JP7259115B2 - LENS UNIT, CONTROL METHOD AND CONTROL PROGRAM THEREOF - Google Patents

Description

The present invention relates to a lens unit, its control method and control program.

In general, an image pickup apparatus having an image blur correction function has, for example, a gyro sensor as a shake detection section, and performs image shake correction on an imaging plane based on the shake of the image pickup apparatus detected by the shake detection section. ing.

By the way, in a state where image blur correction is unnecessary (for example, in a state where the imaging device is fixed to a tripod), the shake detection unit may react to noise or the like, and image blur correction may be performed. In such a case, an unnatural image may be picked up.

For this reason, there is a conventional imaging apparatus that determines whether or not image blur correction is necessary, and prohibits image blur correction if it is determined that image blur correction is unnecessary. For example, there is an imaging device that compares the amount of shake of the imaging device detected by a shake detection unit with a predetermined threshold value, and determines whether or not image shake correction is necessary according to the comparison result ( See Patent Document 1).

JP 2010-147761 A

However, in the image pickup apparatus described in Patent Document 1 above, if both the image pickup apparatus body and the interchangeable lens are provided with an image blur correction function, the determination result as to whether or not the image shake correction is necessary is determined by the image pickup apparatus. There may be differences between the main body and the interchangeable lens. In such a case, image blur correction is performed only on the side determined to require image blur correction. In other words, in an image pickup apparatus in which both the image pickup apparatus main body and the interchangeable lens have shake correction functions, it is assumed that image shake correction is performed by combining both image shake corrections. Therefore, if image blur correction is performed only on one of them, an unnatural image may be captured.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lens unit, a control method thereof, and a control program that can prevent unnatural image pickup when an image pickup apparatus body and an interchangeable lens are provided with an image blur correction function. to provide.

In order to achieve the above object, the lens unit according to the present invention is a lens unit that can be attached to an image pickup apparatus, and comprises a photographing lens and a first detection result for detecting vibration of the lens unit. detection means; first image blur correction means for performing image blur correction by driving and controlling the photographing lens based on the first detection result; and the first image blur correction selected from a plurality of correction modes. and a communication means for communicating with the imaging device, wherein the imaging device receives a second shake detection sensor and a detection result of the second shake detection sensor. and a selection means for selecting a correction mode of the second image blur correction means based on the detection result of the second blur detection sensor, The communication means receives information indicating the correction mode selected by the selection means from the imaging device, and the setting means selects the first detection result and the correction mode selected by the selection means. The correction mode of the first image blur correction means is set based on the above.

According to the present invention, when the imaging apparatus main body and the lens unit each have an image blur correction function, the operation of the image blur correction function is mutually referred to, thereby preventing unnatural image pickup. can do.

1 is a block diagram showing the configuration of an example of an imaging device according to a first embodiment of the present invention; FIG. 2 is a diagram for explaining an example of vibration amount detection by a shake detection unit shown in FIG. 1; FIG. 2 is a flowchart for explaining processing performed by the camera body shown in FIG. 1; 2 is a flowchart for explaining processing performed in the lens unit shown in FIG. 1; FIG. 4 is a flowchart for explaining tripod detection timer interrupt processing 1 shown in FIG. 3 ; FIG. FIG. 4 is a flowchart for explaining tripod detection timer interrupt processing 2 shown in FIG. 3 ; FIG. FIG. 4 is a flowchart for explaining gyro readout timer interrupt processing shown in FIG. 3; FIG. 5 is a flowchart for explaining tripod detection timer interrupt processing 3 shown in FIG. 4; 9 is a flowchart for explaining tripod detection timer interrupt processing 1 performed in the camera body of the camera according to the second embodiment of the present invention; 10 is a flowchart for explaining tripod detection timer interrupt processing 3 performed by the lens unit in the camera according to the second embodiment of the present invention; FIG. 11 is a flow chart for explaining processing performed in a camera body in a camera according to a third embodiment of the present invention; FIG. FIG. 11 is a flow chart for explaining processing performed by a lens unit in a camera according to a third embodiment of the present invention; FIG. 12 is a flowchart for explaining tripod detection timer interrupt processing 1 shown in FIG. 11; 13 is a flowchart for explaining tripod detection timer interrupt processing 3 shown in FIG. 12; FIG. 12 is a block diagram showing the configuration of an example of a camera according to a fourth embodiment of the present invention; FIG. FIG. 16 is a flowchart for explaining processing performed by the camera body shown in FIG. 15; FIG. FIG. 16 is a flowchart for explaining processing performed by the lens unit shown in FIG. 15; FIG. FIG. 17 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 shown in FIG. 16; FIG. FIG. 17 is a flowchart for explaining shake correction mode determination timer interrupt processing 2 shown in FIG. 16; FIG. FIG. 18 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 shown in FIG. 17; FIG. FIG. 16 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 performed in the camera body in the camera according to the fifth embodiment of the present invention; FIG. FIG. 16 is a flow chart for explaining shake correction mode determination timer interrupt processing 3 performed in the lens unit in the camera according to the fifth embodiment of the present invention; FIG. FIG. 16 is a flow chart for explaining processing performed in a camera body in a camera according to a sixth embodiment of the present invention; FIG. FIG. 16 is a flow chart for explaining processing performed by a lens unit in a camera according to a sixth embodiment of the present invention; FIG. FIG. 24 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 shown in FIG. 23; FIG. FIG. 25 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 shown in FIG. 24; FIG. FIG. 20 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 performed by the camera body in the camera according to the seventh embodiment of the present invention; FIG. FIG. 21 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 performed in the lens unit in the camera according to the seventh embodiment of the present invention; FIG. FIG. 29 is a flowchart for explaining shake correction section mode operation section input reflecting processing shown in FIG. 28; FIG.

An example of an imaging device according to an embodiment of the present invention will be described below with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing the configuration of an example of an imaging device according to the first embodiment of the present invention.

The illustrated imaging device is, for example, a digital camera (hereinafter simply referred to as a camera) and has a camera body (imaging device body) 100 and a lens unit 200 . The lens unit 200 is attachable to and detachable from the camera body 100 . That is, the lens unit 200 is a replaceable lens unit.

Lens unit 200 is attached to camera body 100 by lens mounts 102 and 202 . The camera body 100 is provided with an imaging element 121 such as a CMOS image sensor, and an optical image (object image) is formed on the imaging element 121 via the lens unit 200 and the shutter 144 . Note that the lens unit 200 is provided with a photographing lens 210 and a diaphragm 211 .

The imaging device 121 outputs an electrical signal (analog signal) corresponding to the optical image. The A/D converter 122 converts the analog signal output from the imaging element 121 into a digital signal by A/D conversion. Then, the digital signal is stored in the memory 127 as image data by the memory control section 124 under the control of the system control section 120 .

The image processing unit 123 performs image processing such as predetermined pixel interpolation processing or color conversion processing on the digital signal output from the A/D conversion unit 122 or the image data read from the memory 127 by the memory control unit 124 . Apply. The image processing unit 123 includes a compression/expansion circuit that compresses and expands image data by adaptive discrete cosine transform (ADCT) or the like.

The image processing unit 123 reads the image data stored in the memory 127 , performs compression processing or decompression processing, and writes the processed image data to the memory 127 . Further, the image processing unit 123 electronically corrects image blur according to the amount of camera shake detected by the shake detection unit 151 under the control of the system control unit 120 .

The image calculation unit 129 obtains the contrast value in the image data and determines the focused state of the image data according to the contrast value. Furthermore, the image calculation unit 129 obtains a correlation value between the image data stored in the memory 127 and the image data obtained by the image pickup device 121, and searches for a region with the highest correlation in these image data.

Memory control unit 124 controls transmission and reception of image data between A/D conversion unit 122 , image processing unit 123 , display unit 110 , external removable memory unit 130 and memory 127 . The digital signal output from the A/D converter 122 is written in the memory 127 via the image processor 123 and memory controller 124 or directly via the memory controller 124 .

The display unit 110 has a liquid crystal panel display unit and a backlight illumination unit, and sequentially displays images based on image data according to the output of the imaging device 121 as through images in real time. This allows the user to perform so-called live view photography. During live view shooting, an AF frame indicating an AF area is superimposed on the image and displayed on the display unit 110 so that the user can recognize the position of the subject for AF. At this time, if the display unit 110 is provided with a touch panel, the user can perform touch AF for designating the position of the subject for AF.

A system control unit 120 controls the entire camera. Note that the system control unit 120 also controls the lens unit 200 .

The memory 127 stores still images and moving images obtained as a result of photographing, as well as image data for reproduction display. The memory 127 has a sufficient storage capacity for storing a predetermined number of still images and moving images. The memory 127 has a program stack area, a status storage area, an arithmetic area, a work area, and an image display data area for the system control unit 120 . Various calculations are performed by the system control unit 120 using the calculation area of the memory 127 .

The non-volatile memory 128 is an electrically erasable/recordable memory, such as flash memory or EEPROM. A non-volatile memory 128 stores a program for controlling the camera as well as saving the photographing state.

The external removable memory section 130 includes a recording medium such as a compact flash (registered trademark) or an SD card, and is removable from the camera body 100 . An image file is recorded in the external removable memory unit 130 .

The power supply unit 131 includes a battery, a battery detection circuit, a DC-DC converter, a switch circuit for switching blocks to be energized, and the like. The power supply unit 131 detects whether or not a battery is attached, the type of battery, and the remaining battery level. Also, the power supply unit 131 controls the DC-DC converter based on the detection result and an instruction from the system control unit 120 to supply necessary voltage to each block unit for a necessary period.

Under the control of the system control unit 120 , the shutter control unit 141 controls the shutter 144 in cooperation with the lens control unit 203 that controls the diaphragm 211 based on the photometry result obtained by the photometry unit 142 .

A photometry unit 142 is a block for performing AE (automatic exposure) processing. An optical image that has entered the lens 210 enters the photometry unit 142 via a diaphragm 211, lens mounts 202 and 102, and a photometry lens (not shown). Then, the photometry unit 142 measures the exposure state based on the optical image to obtain a photometry result.

A distance measuring unit 143 is a block for performing AF processing. The optical image incident on the lens 210 enters the distance measuring unit 143 via the diaphragm 211, the lens mounts 202 and 102, and the distance measuring mirror (not shown). Then, the distance measuring unit 143 measures the focused state according to the optical image and obtains the distance measurement result.

During live view shooting, the system control unit 120 measures the focused state of image data according to the contrast value obtained by the image calculation unit 129 .

A shutter 144 is arranged in front of the image sensor 121 and shields the image sensor 121 from light during non-shooting. When photographing, under the control of the system control unit 120 , the shutter control unit 141 opens the shutter 144 to form an optical image on the image sensor 121 .

The operation unit 132 is operated by the user and gives various operation instructions to the system control unit 120 . The operation unit 132 includes, for example, switches and dials, pointing by line-of-sight detection, a voice recognition device, and the like. Note that the operation unit 132 may be provided with at least one of these switches and dials, pointing by line-of-sight detection, and a voice recognition device. The shake detection unit 151 is, for example, a gyro sensor, and detects the amount of vibration of the camera.

FIG. 2 is a diagram for explaining an example of vibration amount detection by a shake detection unit shown in FIG.

The shake detection unit 151 detects the vibration and vibration amount in three axial directions of the pitch direction, yaw direction, and roll direction in the camera body 100 .

Referring to FIG. 1 again, the camera body 100 is provided with a lens mount 102 and the lens unit 200 is provided with a lens mount 202 . Lens mounts 102 and 202 connect lens unit 200 to camera body 100 . At this time, the camera body 100 is electrically connected to the lens unit 200 by the connectors 101 and 201 . The system controller 120 detects attachment of the lens unit 200 via the connectors 101 and 201 and communicates with the lens controller 203 .

As described above, the lens unit 200 is equipped with the photographing lens 210 and the diaphragm 211 . A lens control unit 203 controls the entire lens unit 200 . The lens control unit 203 is provided with a memory that stores constants, variables, programs, and the like for operation. Further, the lens control unit 203 has a non-volatile memory that holds identification information such as a number unique to the lens unit 200, management information, functional information such as the maximum aperture value and minimum aperture value, focal length, and current and past setting values. memory is provided.

A lens control unit 203 controls focusing of the photographing lens 210 based on the distance measurement result measured by the distance measurement unit 143 or the image processing unit 123 . As a result, the imaging position of the optical image incident on the image sensor 121 is changed, and the AF operation is performed. Note that the lens control unit 203 controls the diaphragm 211 and the zooming of the photographing lens 210 .

A lens driving unit 204 drives and controls a photographing lens 210 and a diaphragm 211 under the control of the lens control unit 203 . For example, the lens driving unit 204 drives the photographing lens 210 based on the focusing control signal, zooming control signal, and image blur correction control signal sent from the lens control unit 203 . Further, the lens driving section 204 drives the diaphragm 211 according to the diaphragm control signal sent from the lens control section 203 .

Note that the lens driving unit 204 includes a focusing control mechanism, a zooming control mechanism, an image blur correction control mechanism, and an aperture control mechanism.

A shake detection unit 205 is, for example, a gyro sensor, and detects the amount of vibration of the lens unit 200 . The shake detection unit 205 detects the vibration and the amount of vibration in two axial directions of the Pitch direction and the Yaw direction among the Pitch direction, the Yaw direction, and the Roll direction shown in FIG.

In the camera shown in FIG. 1, the lens control unit 203 controls the photographing lens 210 according to the shake amount detected by the shake detection unit 205 to perform optical shake correction. Further, under the control of the system control unit 120 , the image processing unit 123 electronically corrects the image according to the amount of shake detected by the shake detection unit 151 .

FIG. 3 is a flowchart for explaining processing performed by the camera body shown in FIG. Note that the processing related to the illustrated flowchart is performed under the control of the system control unit 120 .

When the camera body processing is started in response to the operation of the operation section 132, the system control section 120 determines whether or not the lens unit 200 is attached to the camera body 100 (step S300). If lens unit 200 is not attached (NO in step S300), system control unit 120 waits.

When the lens unit 200 is attached (YES in step S300), the system control section 120 starts communication with the lens control section 203 (step S301: lens communication). Then, the system control unit 120 acquires lens information (ID) for determining the type of the lens unit 200 from the lens control unit 203 (step S302). Here, as the lens information, for example, the lens ID and optical correction value information specific to the lens are acquired.

Subsequently, based on the lens information, the system control unit 120 determines whether or not the lens unit 200 is a lens unit capable of communicating the tripod detection result (step S303). It should be noted that tripod detection means detecting whether or not the amount of shake in camera body 100 and lens unit 200 is small enough to eliminate the need for shake correction. For example, when the camera is fixed to a tripod, the shake amount is reduced to the extent that shake correction is unnecessary.

If the tripod detection determination result can be communicated (YES in step S303), the system control unit 120 starts first tripod detection timer interrupt processing (tripod detection timer interrupt processing 1) described later (step S304). ). Thereafter, the tripod detection timer interrupt process 1 is repeated at predetermined time intervals.

If communication of the tripod detection determination result is not possible (NO in step S303), the system control unit 120 starts second tripod detection timer interrupt processing (tripod detection timer interrupt processing 2) described later (step S305). . Thereafter, the tripod detection timer interrupt process 2 is repeated at predetermined time intervals.

After the process of step S304 or S305, the system control unit 120 starts gyro readout timer interrupt process (step S306). Thereafter, the gyro readout timer interrupt process is repeated at predetermined time intervals. Then, the system control unit 120 ends the camera body processing.

FIG. 4 is a flow chart for explaining the processing performed by the lens unit shown in FIG. Note that the processing related to the illustrated flowchart is performed under the control of the lens control unit 203 .

When the lens unit 200 is attached to the camera body 100 and lens communication starts, the lens control unit 203 transmits lens information to the system control unit 120 (step S401). Subsequently, the lens control unit 203 starts third tripod detection timer interruption processing (tripod detection timer interruption processing 3) described later (step S402). Thereafter, the tripod detection timer interrupt process 3 is repeated at predetermined time intervals.

Next, the lens control unit 203 starts gyro readout timer interrupt processing, which will be described later (step S403). Thereafter, the gyro readout timer interrupt process is repeated at predetermined time intervals. Then, the lens control unit 203 ends the lens unit processing.

FIG. 5 is a flowchart for explaining tripod detection timer interrupt processing 1 shown in FIG.

When the tripod detection timer interrupt process 1 is started, the system control unit 120 requests the lens control unit 203 to send the tripod detection determination result in the lens unit 200 (step S501). Accordingly, the system control unit 120 receives the tripod detection determination result in the lens unit 200 from the lens control unit 203 (step S502).

The system control unit 120 determines whether or not the tripod detection determination result is "no tripod" (step S503). Here, "without a tripod" refers to a state in which the amount of shake is large and camera shake correction is required, and "with a tripod" refers to a state in which the amount of shake is sufficiently small and camera shake correction is unnecessary. In other words, "without a tripod" means that the amount of shake is greater than a predetermined threshold and requires image stabilization, and "with a tripod" means that the amount of shake is less than the predetermined threshold and does not require image stabilization. say.

If "without tripod" (YES in step S503), system control unit 120 turns on the shake correction function in camera body 100 (step S504). On the other hand, if "with a tripod" (NO in step S503), the system control unit 120 turns off the shake correction function in the camera body 100 (step S505).

After the process of step S504 or S505, the system control unit 120 ends the tripod detection timer interrupt process 1. FIG.

FIG. 6 is a flowchart for explaining tripod detection timer interrupt processing 2 shown in FIG.

When the tripod detection timer interrupt process 2 is started, the system control unit 120 determines whether or not the number of shake amount data (gyro data) detected by the shake detection unit 151 is equal to or greater than a predetermined number of samples (eg, 500 samples). is determined (step S601).

If the predetermined number of samples or more have not been obtained (NO in step S601), the system control unit 120 terminates the tripod detection timer interrupt process 2. FIG. On the other hand, if the predetermined number or more of samples have been obtained (YES in step S601), the system control unit 120 checks the most recent predetermined number of samples (eg, 500 samples) in the shake amount data detected by the shake detection unit 151. . Then, the system control unit 120 determines whether or not there is a sample in which the shake amount exceeds a preset threshold (step S602).

If there are samples exceeding the preset threshold (YES in step S602), the system control unit 120 determines that there is no tripod and turns on the shake correction function in the camera body 100 (step S603). Then, the system control unit 120 terminates the tripod detection timer interrupt process 2 .

If there are no samples exceeding the preset threshold (NO in step S602), the system control unit 120 determines that "a tripod is present" and turns off the shake correction function in the camera body 100 (step S604). Then, the system control unit 120 terminates the tripod detection timer interrupt process 2 .

FIG. 7 is a flowchart for explaining the gyro readout timer interrupt process shown in FIG. Note that the gyro read timer interrupt processing shown in FIG. 4 is also performed by the lens control unit 203 according to the flowchart shown in FIG.

When the gyro readout timer interrupt process is started, the system control unit 120 acquires gyro data detected by the shake detection unit 151 (step S701). Then, the system control unit 120 terminates the gyro readout timer interrupt processing. In the lens unit 200, the lens control section 203 acquires the gyro data detected by the shake detection section 205. FIG.

FIG. 8 is a flowchart for explaining tripod detection timer interrupt processing 3 shown in FIG.

When the tripod detection timer interrupt process 3 is started, the lens control unit 203 determines whether or not the number of shake amount data (gyro data) detected by the shake detection unit 205 is equal to or greater than a predetermined number of samples (eg, 500 samples). is determined (step S801).

If the predetermined number of samples or more have not been obtained (NO in step S801), the lens control unit 203 terminates the tripod detection timer interrupt process 3. FIG. On the other hand, if a predetermined number or more of samples have been obtained (YES in step S801), the lens control unit 203 checks the latest predetermined number of samples (eg, 500 samples) in the shake amount data detected by the shake detection unit 205. . Then, the lens control unit 203 determines whether or not there is a sample in which the shake amount exceeds a preset threshold (step S802).

If there are samples exceeding the preset threshold (YES in step S802), the lens control unit 203 determines that "no tripod" and turns on the shake correction function in the lens unit 200 (step S803). If there are no samples exceeding the preset threshold (NO in step S802), the lens control unit 203 determines that "a tripod is present" and turns off the shake correction function in the lens unit 200 (step S804).

After the process of step S803 or S804, the lens control unit 203 determines whether or not there is a request from the system control unit 120 to transmit the tripod detection determination result (step S805). If there is a transmission request (YES in step S805), the lens control unit 203 sends the tripod detection determination result to the system control unit 120 (step S806). Then, the lens control unit 203 ends the tripod detection timer interrupt process 3 .

On the other hand, if there is no request to transmit the tripod detection determination result (NO in step S805), the lens control unit 203 terminates the tripod detection timer interrupt process 3. FIG.

Thus, in the first embodiment of the present invention, the tripod detection determination result in the lens unit 200 is prioritized, and the determination result of whether or not to perform shake correction in the camera body 100 matches the determination result in the lens unit 200. Let As a result, it is possible to prevent an unnatural image from being captured by turning on the shake correction function of only one of the camera body 100 and the lens unit 200 .

In the first embodiment described above, the tripod detection determination result of the lens unit 200 is prioritized, but the tripod detection determination result of the camera body 100 may be prioritized.

[Second embodiment]
Next, an example of a camera according to a second embodiment of the invention will be described. The configuration of the camera according to the second embodiment is the same as that of the camera shown in FIG. Also, camera body processing, lens unit processing, tripod detection timer interrupt processing 2, and gyro sensor readout timer interrupt processing in the second embodiment are the same as the processing shown in FIGS. is.

FIG. 9 is a flowchart for explaining tripod detection timer interrupt processing 1 performed in the camera body of the camera according to the second embodiment of the present invention.

When the tripod detection timer interrupt process 1 is started, the system control unit 120 determines whether or not the number of shake amount data (gyro data) detected by the shake detection unit 151 is equal to or greater than a predetermined number of samples (eg, 500 samples). is determined (step S901).

If the predetermined number of samples or more have not been acquired (NO in step S901), the system control unit 120 terminates the tripod detection timer interrupt process 1. FIG. On the other hand, if the predetermined number or more of samples have been obtained (YES in step S901), the system control unit 120 checks the most recent predetermined number of samples (eg, 500 samples) in the shake amount data detected by the shake detection unit 151. . Then, the system control unit 120 determines whether or not there is a sample in which the shake amount exceeds a preset threshold (step S902).

If there is a sample whose shake amount exceeds the preset threshold value (YES in step S902), the system control unit 120 determines that "no tripod" (step S903). On the other hand, if there is no sample whose shake amount exceeds the preset threshold value (NO in step S902), the system control unit 120 determines that "a tripod is present" (step S904).

After the process of step S903 or S904, the system control unit 120 determines whether or not the tripod detection determination result in the camera body 100 is the same as the determination result previously transmitted to the lens unit 200 (step S905). If the tripod detection determination results are not the same (NO in step S905), the system control unit 120 transmits the tripod detection determination result in the camera body 100 to the lens control unit 203 (step S906). The system control unit 120 performs the processing of step S906 even when the tripod detection determination result in the camera body 100 has not yet been transmitted to the lens unit 200 .

Subsequently, the system control unit 120 checks the tripod detection determination result received last from the lens unit 200 . Then, the system control unit 120 determines whether the tripod detection determination result in the camera body 100 is "no tripod" and whether the tripod detection determination result in the lens unit 200 is "no tripod" (step S907). Note that if the tripod detection determination results are the same (YES in step S905), the system control unit 120 proceeds to the process of step S907.

If the tripod detection determination results for both the camera body 100 and the lens unit 200 are "no tripod" (YES in step S907), the system control unit 120 turns on the shake correction function in the camera body 100 (step S908). Then, the system control unit 120 terminates the tripod detection timer interrupt process 1 .

If the tripod detection determination results for at least one of the camera body 100 and the lens unit 200 are both "tripod present" (NO in step S907), the system control unit 120 turns off the shake correction function in the camera body 100 (step S909). Then, the system control unit 120 terminates the tripod detection timer interrupt process 1 .

FIG. 10 is a flowchart for explaining tripod detection timer interrupt processing 3 performed by the lens unit in the camera according to the second embodiment of the present invention.

When the tripod detection timer interrupt process 3 is started, the lens control unit 203 determines whether or not the number of shake amount data (gyro data) detected by the shake detection unit 205 is equal to or greater than a predetermined number of samples (eg, 500 samples). is determined (step S1001).

If the predetermined number of samples or more have not been obtained (NO in step S1001), the lens control unit 203 terminates the tripod detection timer interrupt process 3. FIG. On the other hand, if a predetermined number or more of samples have been obtained (YES in step S1001), the lens control unit 203 checks the most recent predetermined number of samples (eg, 500 samples) in the shake amount data detected by the shake detection unit 205. . Then, the lens control unit 203 determines whether or not there is a sample in which the shake amount exceeds a preset threshold (step S1002).

If there is a sample whose shake amount exceeds the preset threshold value (YES in step S1002), the lens control unit 203 determines "no tripod" (step S1003). On the other hand, if there is no sample whose shake amount exceeds the preset threshold value (NO in step S1002), the lens control unit 203 determines that "there is a tripod" (step S1004).

After the processing in step S1003 or S1004, the lens control unit 203 determines whether or not the tripod detection determination result in the lens unit 200 is the same as the determination result previously transmitted to the camera body 100 (step S1005). If the tripod detection determination results are not the same (NO in step S1005), the lens control unit 203 transmits the tripod detection determination result in the lens unit 200 to the system control unit 120 (step S1006). The lens control unit 203 performs the processing of step S1006 even when the tripod detection determination result in the lens unit 200 has not yet been transmitted to the camera body 100 .

Subsequently, the lens control unit 203 checks the tripod detection determination result received last from the camera body 100 . Then, the lens control unit 203 determines whether the tripod detection determination result in the lens unit 200 is "no tripod" and whether the tripod detection determination result in the camera body 100 is "no tripod" (step S1007). Note that if the tripod detection determination results are the same (YES in step S1005), the lens control unit 203 proceeds to the process of step S1007.

If the tripod detection determination results for both the lens unit 200 and the camera body 100 are "no tripod" (YES in step S1007), the lens control unit 203 turns on the shake correction function in the lens unit 200 (step S1008). Then, the lens control unit 203 ends the tripod detection timer interrupt process 3 .

If the tripod detection determination results for at least one of the lens unit 200 and camera body 100 are both "tripod present" (NO in step S1007), the lens control unit 203 turns off the shake correction function in the lens unit 200 (step S1009). Then, the system control unit 120 terminates the tripod detection timer interrupt process 3 .

As described above, in the second embodiment of the present invention, when the amount of shake in at least one of the camera body 100 and the lens unit 200 is equal to or less than the threshold, neither the camera body 100 nor the lens unit 200 performs shake correction. make it As a result, when the shake amount is sufficiently small, even if one of the detected shake amounts is incorrect, the shake correction function of one of the shake correction functions is turned on to prevent an unnatural image from being captured. be able to.

Furthermore, in the second embodiment, the system control unit 120 and the lens control unit 203 transmit and receive the determination result only when the tripod detection determination result differs from the previous determination result. As a result, the frequency of communication between the camera body 100 and the lens unit 20 can be reduced.

[Third embodiment]
Next, an example of a camera according to a third embodiment of the invention will be described. The configuration of the camera according to the third embodiment is the same as that of the camera shown in FIG.

FIG. 11 is a flow chart for explaining the processing performed by the camera body in the camera according to the third embodiment of the present invention. In FIG. 11, the same steps as those in the flowchart shown in FIG. 3 are given the same reference numerals, and description thereof will be omitted.

In step S303, if the tripod detection determination result can be communicated (YES in step S303), the system control unit 120 receives information (reliability information) regarding the reliability of the detection result by the shake detection unit (gyro) 205 from the lens control unit 203. information) is received (step S1104). Here, as the reliability information, for example, information about the S/N ratio of the detection result by the shake detection unit 205 is received.

Subsequently, the system control unit 120 sends information (reliability information) regarding the reliability of the detection result by the shake detection unit 151 to the lens control unit 203 (step S1105). Here, as the reliability information, for example, information about the S/N ratio of the detection result by the shake detection unit 151 is sent. Then, the system control unit 120 starts tripod detection timer interrupt processing 1, which will be described later. Thereafter, this tripod detection timer interrupt process 1 is repeated at predetermined time intervals. After that, the system control unit 120 proceeds to the process of step S306.

FIG. 12 is a flowchart for explaining the processing performed by the lens unit in the camera according to the third embodiment of the invention. 12, the same steps as in the flowchart shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

Following the processing of step S401, the lens control unit 203 sends reliability information related to the detection result of the shake detection unit 205 to the system control unit 120 (step S1202). Then, the lens control unit 203 receives reliability information related to the detection result by the shake detection unit 151 from the system control unit 120 (step S1203).

Subsequently, the lens control unit 302 enables tripod detection timer interrupt processing 3, which will be described later (step S1204). Thereafter, this tripod detection timer interrupt process 3 is repeated at predetermined time intervals. After that, the lens control unit 203 proceeds to the process of step S403.

FIG. 13 is a flowchart for explaining tripod detection timer interrupt processing 1 shown in FIG. 13, the same steps as in the flowchart shown in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

When the tripod detection timer interrupt process 1 is started, the system control unit 120 determines whether or not the reliability of the shake detection unit 151 is higher than the reliability of the shake detection unit 205 based on the reliability information (step S1301). ). If the reliability of shake detection unit 151 is higher than that of shake detection unit 205 (YES in step S1301), system control unit 120 proceeds to the process of step S901.

In FIG. 13, the process of step S908 is performed after the process of step S903. Moreover, the process of step S909 is performed after the process of step S904. After the process of step S908 or S909, the system control unit 120 performs the process of step S905. If the tripod detection determination results are not the same (NO in step S905), the system control unit 120 performs the processing of step S906 and terminates the tripod detection timer interrupt processing 1. FIG. If the tripod detection determination results are the same (YES in step S905), system control unit 120 terminates tripod detection timer interrupt process 1. FIG.

If the reliability of the shake detection unit 151 is lower than or equal to the reliability of the shake detection unit 205 (NO in step S1301), the system control unit 120 checks the tripod detection determination result received last from the lens unit 200. FIG. Then, the system control unit 120 determines whether or not the tripod detection determination result is "no tripod" (step S1302).

If the tripod detection determination result is "no tripod" (YES in step S1302), the system control unit 120 turns on the shake correction function of the camera body 100 (step S1303). Then, the system control unit 120 terminates the tripod detection timer interrupt process 1 .

On the other hand, if the tripod detection determination result is "with a tripod" (NO in step S1302), the system control unit 120 turns off the shake correction function of the camera body 100 (step S1304). Then, the system control unit 120 terminates the tripod detection timer interrupt process 1 .

FIG. 14 is a flowchart for explaining tripod detection timer interrupt processing 3 shown in FIG. 14, the same steps as in the flowchart shown in FIG. 10 are denoted by the same reference numerals, and descriptions thereof are omitted.

When the tripod detection timer interrupt process 3 is started, the lens control unit 203 determines whether or not the reliability of the shake detection unit 151 is higher than the reliability of the shake detection unit 205 based on the reliability information (step S1401). ). If the reliability of the shake detection unit 151 is not higher than that of the shake detection unit 205 (NO in step S1401), the lens control unit 203 proceeds to the process of step S1001.

In FIG. 14, the process of step S1008 is performed after the process of step S1003. Moreover, the process of step S1009 is performed after the process of step S1004. After the process of step S1008 or S1009, the lens control unit 203 performs the process of step S1005. If the tripod detection determination results are not the same (NO in step S1005), the lens control unit 203 performs the process of step S1006 and ends the tripod detection timer interrupt process 3. FIG. If the tripod detection determination results are the same (YES in step S1005), the lens control unit 203 terminates the tripod detection timer interrupt process 3. FIG.

If the reliability of the shake detection unit 151 is higher than that of the shake detection unit 205 (YES in step S1401), the lens control unit 203 checks the tripod detection determination result received last from the camera body 100. FIG. Then, the lens control unit 203 determines whether or not the tripod detection determination result is "no tripod" (step S1402).

If the tripod detection determination result is "no tripod" (YES in step S1402), the lens control unit 203 turns on the shake correction function of the lens unit 200 (step S1403). Then, the lens control unit 203 ends the tripod detection timer interrupt process 3 .

On the other hand, if the tripod detection determination result is "with tripod" (NO in step S1402), the lens control unit 203 turns off the shake correction function of the lens unit 200 (step S1404). Then, the lens control unit 203 ends the tripod detection timer interrupt process 3 .

As described above, in the third embodiment of the present invention, whether or not to perform shake correction is determined using the detection result of one of the shake detection units 151 and 205 based on the reliability information of the shake detection unit 151 and the shake detection unit 205. do. As a result, it is possible to prevent an unnatural image from being captured by turning on the shake correction function of only one of the camera body 100 and the lens unit 200 .

In the first to third embodiments described above, tripod detection for detecting whether or not a tripod is used has been described as an example. It suffices to determine whether or not.

In the above-described first to third embodiments, the processing associated with the tripod detection determination has been described. Not exclusively. In the following, processing associated with shake correction mode determination will be described instead of processing associated with tripod detection determination.

[Fourth embodiment]
Next, an example of a camera according to a fourth embodiment of the invention will be described.

FIG. 15 is a block diagram showing the configuration of an example of a camera according to the fourth embodiment of the invention. In FIG. 15, the same reference numerals are given to the same blocks as those of the camera shown in FIG. 1, and the description thereof will be omitted.

In the illustrated camera, the lens unit 200 is provided with a shake correction mode operation section 206 . An image processing unit 123 provided in the camera body 100 performs shake correction processing according to a set shake correction mode among a plurality of shake correction modes described later. Further, the lens driving unit 204 provided in the lens unit 200 drives the shake correction control mechanism under the control of the lens control unit 203 according to the shake correction mode set among the plurality of shake correction modes.

The shake correction mode operation unit 206 is, for example, a mechanical switch, and the user operates the shake correction mode operation unit 206 to fix the shake correction mode in the lens driving unit 204 to the user-selected shake correction mode, or It is possible to set whether to select the shake correction mode by automatic determination. When the shake correction mode is not fixed by the shake correction mode operation unit 206, the lens control unit 203 determines the shake correction mode of the lens driving unit 204 and sets the shake correction mode according to the determination result.

Here, the plurality of shake correction modes include, for example, a normal mode, a panning mode, a tripod mode, a correction mode only during exposure, and a shake correction off mode.

The normal mode is a shake correction mode suitable for shooting while holding the camera in hand. image stabilization is performed.

The panning mode is a shake correction mode suitable for so-called panning, and when the user is shaking the camera to follow the subject, only the shake correction in the direction in which the camera is being shaken is turned off.

Tripod mode is a shake correction mode suitable for shooting with the camera fixed to a tripod. is prohibited. Instead, in tripod mode, shake correction is performed specifically for shake caused by release vibration, which is easily affected when the camera is fixed on a tripod.

The only correction mode during exposure is a vibration correction mode that is suitable for tracking a fast-moving subject through the viewfinder. This prevents the followability of the finder image from being impaired due to shake correction.

Note that the shake correction off mode is a mode in which shake correction is prohibited regardless of the amount of shake. Also, the lens driving unit 204 and the image processing unit 123 may perform driving and processing in a shake correction mode other than the shake correction mode described above.

FIG. 16 is a flowchart for explaining the processing performed by the camera body shown in FIG. 15; Note that the processing related to the illustrated flowchart is performed under the control of the system control unit 120 . Also, the processing of steps S1600 to 1602 shown in FIG. 16 is the same as the processing of steps S300 to 302 shown in FIG. 3, respectively, so the description thereof is omitted.

After the processing of step S1602, the system control unit 120 determines whether or not the lens unit 200 is a lens unit capable of communicating the determination result of the shake correction mode based on the lens information (step S1603). If the determination result of the shake correction mode can be communicated (YES in step S1603), the system control unit 120 performs first shake correction mode determination timer interrupt processing (shake correction mode determination timer interrupt processing 1) described later. is started (step S1604). Thereafter, shake correction mode determination timer interrupt processing 1 is repeated at predetermined time intervals.

If the shake correction mode determination result cannot be communicated (NO in step S1603), the system control unit 120 starts second shake correction mode determination timer interrupt processing (shake correction mode determination timer interrupt processing 2), which will be described later. (step S1605). After that, the shake correction mode determination timer interrupt process 2 is repeated at predetermined time intervals.

After the processing of step S1604 or S1605, the system control unit 120 starts gyro readout timer interrupt processing in step S1606. Note that the processing of step S1606 is the same as the processing of step S306 shown in FIG. 3, so the description is omitted.

After step S1606, the system control unit 120 performs shake correction by the image processing unit 123 according to the shake correction mode set in step S1604 or S1605. Then, the system control unit 120 ends the camera body processing.

FIG. 17 is a flowchart for explaining the processing performed by the lens unit shown in FIG. 15; Note that the processing related to the illustrated flowchart is performed under the control of the lens control unit 203 . Further, the processing of S1701 shown in FIG. 17 is the same as the processing of S401 shown in FIG. 4, so the explanation is omitted.

After the process of step S1701, the lens control unit 203 starts a third shake correction mode determination timer interrupt process (shake correction mode determination timer interrupt process 3) (step S1702). Thereafter, the shake correction mode determination timer interrupt process 3 is repeated at predetermined time intervals.

Next, in step S1703, the lens control unit 203 starts gyro read timer interrupt processing in the same manner as in step S403 described with reference to FIG. Then, the lens control unit 203 executes shake correction by the lens driving unit 204 according to the shake correction mode set in step S1702. After that, the lens control unit 203 ends the lens unit processing.

FIG. 18 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 shown in FIG.

When the shake correction mode determination timer interrupt process 1 is started, the system control unit 120 requests the lens control unit 203 to send the determination result of the shake correction mode in the lens unit 200 (step S1801). Accordingly, the system control unit 120 receives the shake correction mode determination result in the lens unit 200 from the lens control unit 203 (step S1802).

Subsequently, the system control unit 120 sets the shake correction mode of the image processing unit 123 to the same mode as the determination result of the shake correction mode received from the lens unit 200 (step S1803). Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 .

FIG. 19 is a flowchart for explaining shake correction mode determination timer interrupt processing 2 shown in FIG.

When the shake correction mode determination timer interrupt process 2 is started, the system control unit 120 performs the processes of steps S1901 and S1902. The processing of steps S1901 and S1902 is the same processing as steps S601 and S602 shown in FIG.

If the predetermined number of samples or more have not been acquired (NO in step S1901), system control unit 120 terminates shake correction mode determination timer interrupt processing 2. FIG.

In step S1902, if there is a sample that exceeds the preset threshold (YES in step S1902), system control unit 120 examines shake amount data for the most recent predetermined time period, and checks that all shake amounts in one direction are present. It is determined whether or not it is a predetermined value or more (a predetermined amount or more) (step S1903). If all are not equal to or greater than the predetermined value (NO in step S1903), the system control unit 120 sets the shake correction mode in the camera body 100 to "normal mode" (step S1904). That is, the system control unit 120 sets the shake correction by the image processing unit 123 to the "normal mode". Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 2 .

If all are equal to or greater than the predetermined value (YES in step S1903), the system control unit 120 sets the shake correction mode in the camera body 100 to "panning mode" (step S1905). That is, the system control unit 120 sets the shake correction by the image processing unit 123 to the "panning mode". Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 2 .

In step S1902, if there are no samples exceeding the preset threshold (NO in step S1902), system control unit 120 sets the shake correction mode in camera body 100 to "tripod mode." That is, the system control unit 120 sets the shake correction by the image processing unit 123 to the “tripod mode”. Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 2 .

FIG. 20 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 shown in FIG.

When the shake correction mode determination timer interrupt process 3 is started, the lens control unit 203 performs the processes of steps S2001 and S2002. The processing of steps S2001 and S2002 is the same processing as S801 and S802 shown in FIG.

In step S2001, if a predetermined number of samples or more have not been obtained (NO in step S2001), the lens control unit 203 ends shake correction mode determination timer interrupt processing 3. FIG. In step S2002, if there is a sample that exceeds the preset threshold (YES in step S2002), the lens control unit 203 checks shake amount data for the most recent predetermined time period, and checks that all shake amounts in one direction are present. It is determined whether or not it is equal to or greater than a predetermined value (step S2003). If all values are not equal to or greater than the predetermined value (NO in step S2003), the lens control unit 203 sets the shake correction mode in the lens unit 200 to "normal mode" (step S2004). That is, the lens control unit 203 sets the shake correction by the lens driving unit 204 to the “normal mode”.

On the other hand, if all are equal to or greater than the predetermined value (YES in step S2003), the lens control unit 203 sets the shake correction mode in the lens unit 200 to the "panning mode" (step S2005). That is, the lens control unit 203 sets the shake correction by the lens driving unit 204 to the "panning mode".

In step S2002, if there is no sample exceeding the preset threshold (NO in step S2002), the lens control unit 203 sets the shake correction mode in the lens unit 200 to "tripod mode" (step S2006). That is, the lens control unit 203 sets the shake correction by the lens driving unit 204 to the “tripod mode”.

After the processing in steps S2004, 2005, or 2006, the lens control unit 203 determines whether or not there is a request from the system control unit 120 to transmit the determination result of the shake correction mode (step S2007). If there is a transmission request (YES in step S2007), the lens control unit 203 notifies the system control unit 120 of the shake correction mode determination result (step S2008). Then, the lens control unit 203 terminates the shake correction mode determination timer interruption process 3 . If there is no transmission request (NO in step S2007), the lens control unit 203 terminates shake correction mode determination timer interrupt processing 3. FIG.

As described above, in the fourth embodiment of the present invention, the shake correction mode of the lens unit 200 is prioritized, and the shake correction mode of the camera body 100 and the shake correction mode of the lens unit 200 are matched. As a result, when the lens unit 200 capable of communicating the determination result of the shake correction mode is attached to the camera body 100, the shake correction modes of the camera body 100 and the lens unit 200 become the same, resulting in an unnatural image. Or it can prevent the video from being generated.

In the fourth embodiment, the camera body 100 and the lens unit 200 are made to match each other by giving priority to the shake correction mode in the lens unit 200. may be given priority.

[Fifth Embodiment]
Next, an example of a camera according to a fifth embodiment of the invention will be described. The configuration of the camera according to the fifth embodiment is the same as that of the camera shown in FIG. 16, 17, 19, and 7 show camera body processing, lens unit processing, shake correction mode determination timer interrupt processing 2, and gyro sensor readout timer interrupt processing in the fifth embodiment. Similar to processing.

FIG. 21 is a flow chart for explaining shake correction mode determination timer interrupt processing 1 performed in the camera body in the camera according to the fifth embodiment of the present invention.

When the shake correction mode determination timer interrupt process 1 is started, the system control unit 120 performs the processes of steps S2101 to S2106. The processing of steps S2101 to S2106 is the same as that of steps S901 to S906 shown in FIG.

In step S2015, if the determination result is the same as the previous time (YES in step S2105), or after the process of step S2106, system control unit 120 proceeds to the process of step S2107.

In step S<b>2107 , the system control unit 120 refers to the determination result of the tripod detection in the camera body 100 and the determination result of the shake correction mode last received from the lens unit 200 . Then, the system control unit 120 determines whether the determination result of the tripod detection in the camera body 100 is "tripod present" or the shake correction mode determination result in the lens unit 200 is "tripod mode".

If the determination result of tripod detection is “tripod present” or the determination result of the shake correction mode received last is not “tripod mode” (NO in step S2107), system control unit 120 proceeds to the processing of step S2108. In step S<b>2108 , the system control unit 120 sets the shake correction mode in the image processing unit 123 to the same mode as the shake correction mode determination result received last from the lens unit 200 . Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 .

On the other hand, if the determination result of the tripod detection is "tripod present" or the determination result of the shake correction mode is "tripod mode" (YES in step S2107), the system control unit 120 sets the shake correction mode in the image processing unit 123 to " tripod mode” (step S2109). Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 .

FIG. 22 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 performed by the lens unit in the camera according to the fifth embodiment of the present invention. 22 are the same as steps S2001 to S2006 shown in FIG.

After the processing of step S2204, S2205, or S2206, the lens control unit 203 determines whether or not the determination result of the shake correction mode in the lens unit 200 is the same as the determination result previously transmitted to the camera body 100 (step S2207). If the determination result is different (NO in step S2207), the lens control unit 203 transmits the determination result of the shake correction mode in the lens unit 200 to the system control unit 120 (step S2208).

If the determination result is the same (YES in step S2207), the lens control unit 203 checks whether or not the last tripod detection determination result received from the camera body 100 is "tripod present" (step S2209). Note that after the process of step S2208, the lens control unit 203 proceeds to the process of step S2209.

If "with tripod" (YES in step S2209), the lens control unit 203 sets the shake correction mode in the lens driving unit 204 to "tripod mode" (step S2210). Then, the lens control unit 203 terminates the shake correction mode determination timer interruption process 3 . In the case of “no tripod” (NO in step S2209), the lens control unit 203 ends shake correction mode determination timer interrupt processing 3. FIG.

Thus, in the fifth embodiment of the present invention, when the shake detection amount in at least one of the shake detection unit 151 and the shake detection unit 205 is equal to or less than the threshold value, the shake correction mode of the camera body 100 and the lens unit 200 is set. to “Tripod Mode”. As a result, even if one of the shake detection unit 151 and the shake detection unit 205 erroneously detects a large amount of shake due to interference of vibration caused by driving the lens, even though the amount of shake is sufficiently small, the "tripod mode" is set. can be prevented from being released.

Further, in the fifth embodiment, the system control unit 120 and the lens control unit 203 communicate the determination result of the shake correction mode and the tripod detection only when the determination result of the shake correction mode is different from the previous determination. Thereby, the frequency of communication between the system control unit 120 and the lens control unit 203 can be reduced.

In the fifth embodiment, "tripod detection" refers to the determination of whether or not the camera body 100 and the lens unit 200 are in a state where the amount of shake is sufficiently small, and whether or not the camera is fixed to a tripod. It is not limited to the determination of whether

[Sixth Embodiment]
Next, an example of a camera according to a sixth embodiment of the invention will be described. The configuration of the camera according to the sixth embodiment is the same as that of the camera shown in FIG.

FIG. 23 is a flow chart for explaining the processing performed by the camera body in the camera according to the sixth embodiment of the present invention.

23, steps S2304 and S2305 are performed between steps S2303 and S2306 corresponding to steps S1603 and S1604 shown in FIG. The processes of steps S2300 to S2303 and S2307 to S2309 shown in the figure are the same as steps S1600 to S1603 and S1605 to S1607 shown in FIG.

If the determination result of the shake correction mode can be communicated (YES in step S2303), the system control unit 120 receives information (reliability information) regarding the reliability of the detection result by the shake detection unit (gyro) 205 from the lens control unit 203. ) is received (step S2304). Here, as the reliability information, for example, information about the S/N ratio of the detection result by the shake detection unit 205 is used.

Subsequently, the system control unit 120 sends information (reliability information) regarding the reliability of the detection result by the shake detection unit 151 to the lens control unit 203 (step S2305). Here, as the reliability information, for example, information about the S/N ratio of the detection result by the shake detection unit 151 is sent. Then, the system control unit 120 starts shake correction mode determination timer interrupt processing 1, which will be described later (step S2306). If the determination result of the shake correction mode cannot be communicated (NO in step S2303), the system control unit 120 starts shake correction mode determination timer interrupt processing 2 (step S2307).

FIG. 24 is a flow chart for explaining the processing performed by the lens unit in the camera according to the sixth embodiment of the present invention. 24, steps S2402 and S2403 are performed between steps S2401 and S2404 corresponding to steps S7701 and S1702 shown in FIG. The processing of steps S2401, S2405, and S2406 shown in the figure is the same processing as steps S1701, S1703, and S1704 shown in FIG.

After the process of step S2401, the lens control unit 203 transmits information regarding the reliability of the output data of the shake detection unit 205 provided in the lens unit 200 to the system control unit 120 (step S2402). For example, information about the S/N ratio of the shake detection unit 205 is transmitted.

Subsequently, the lens control unit 203 receives from the system control unit 120 information regarding the reliability of the output data of the shake detection unit 151 provided in the camera body 100 (step S2403). For example, it receives information about the S/N ratio of the shake detection unit 151 . Then, the lens control unit 203 starts shake correction mode determination timer interrupt processing 3, which will be described later (step S2404).

FIG. 25 is a flowchart for explaining shake correction mode determination timer interrupt processing 1 shown in FIG. Note that in the illustrated flowchart, the processing of step S2501 is the same as that of step S1301 shown in FIG. The processing of steps S2503 and S2504 is the same as that of steps S901 and S902 shown in FIG.

In step S2501, if the reliability of shake detection section 151 is not higher than that of shake detection section 205 (NO in step S2501), system control section 120 proceeds to the process of step S2502. In step S<b>2502 , the system control unit 120 sets the shake correction mode in the image processing unit 123 to the same mode as the shake correction mode determination result received last from the lens unit 200 . Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 .

In step S2503, if a predetermined number of samples or more have not been acquired (NO in step S2503), system control unit 120 terminates shake correction mode determination timer interrupt processing 1. FIG. If there is a sample that exceeds the preset threshold value (YES in step S2504), system control unit 120 checks shake amount data for the most recent predetermined time period, and determines that all shake amounts in one direction are equal to or greater than a predetermined value. It is determined whether or not (step S2505).

If all values are not equal to or greater than the predetermined value (NO in step S2505), the system control unit 120 sets the determination result of the shake correction mode in the camera body 100 to "normal mode". Then, the system control unit 120 sets the shake correction mode in the image processing unit 123 to "normal mode" (step S2506).

If all are equal to or greater than the predetermined value (YES in step S2505), the system control unit 120 sets the determination result of the shake correction mode in the camera body 100 to "panning mode". Then, the system control unit 120 sets the shake correction mode in the image processing unit 123 to the "panning mode" (step S2507).

In step S2504, if there is no sample exceeding the preset threshold (NO in step S2504), system control unit 120 determines the shake correction mode of camera body 100 as "tripod mode". Then, the system control unit 120 sets the shake correction mode in the image processing unit 123 to the "tripod mode" (step S2508).

After the processing of steps S2506, S2507, or S2508, the system control unit 120 determines whether or not the determination result of the shake correction mode in the camera body 100 is the same as the determination result previously transmitted to the lens unit 200 (step S2509).

If the determination result is different (NO in step S2509), the system control unit 120 transmits the determination result of the shake correction mode in the camera body 100 to the lens control unit 203 (step S2510). Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 . If the determination result is the same (YES to step S2509), system control unit 120 terminates shake correction mode determination timer interrupt process 1. FIG.

FIG. 26 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 shown in FIG. Note that in the illustrated flowchart, the processing of step S2601 is the same as that of step S1401 shown in FIG. Also, the processing of steps S2603 to S2610 is the same as that of steps S2201 to S2208 shown in FIG. This is the same processing as S1001 and S1002.

If the reliability of the shake detection unit 151 is higher than that of the shake detection unit 205 in step S2601 (YES in step S2501), the lens control unit 203 proceeds to the process of step S2602. In step S 2602 , the lens control unit 203 sets the shake correction mode in the lens drive unit 204 to the same mode as the determination result of the shake correction mode last received from the camera body 100 . Then, the lens control unit 203 terminates the shake correction mode determination timer interruption process 3 .

Note that after the process of step S2610, the lens control unit 203 terminates the shake correction mode determination timer interrupt process 3. FIG. If the determination results are the same (YES in step S2609), the lens control unit 203 terminates shake correction mode determination timer interrupt processing 3. FIG.

Thus, in the sixth embodiment of the present invention, the system controller 120 and the lens controller 203 transmit and receive information regarding the reliability of the shake detectors 151 and 205 . This makes it possible to determine the shake correction mode of the camera body 100 and the lens unit 200 using the highly reliable output of the shake detection section.

In the sixth embodiment, information on the S/N ratio is used as information on the reliability of the shake detection unit, but other information may be used. For example, information about the temperature of the shake detection unit 151 and the shake detection unit 205 may be used.

[Seventh Embodiment]
Next, an example of a camera according to the seventh embodiment of the invention will be described. The configuration of the camera according to the seventh embodiment is the same as that of the camera shown in FIG. The processing performed by the camera body and the processing performed by the lens unit in the camera according to the seventh embodiment are the same as the processing described with reference to FIGS. 23 and 24. FIG. Other processes are the same as those described in the fourth embodiment.

FIG. 27 is a flow chart for explaining shake correction mode determination timer interrupt processing 1 performed in the camera body in the camera according to the seventh embodiment of the present invention.

When the shake correction mode determination timer interrupt process 1 is started, the system control unit 120 determines whether or not the shake correction mode in the lens unit 200 is specified by the shake correction mode operation unit 206 (step 2701). If the shake correction mode is specified (YES in step S2701), system control unit 120 sets the shake correction mode in image processing unit 123 to the shake correction mode determination result received last from lens unit 200. The same mode is set (step S2702). Then, the system control unit 120 terminates the shake correction mode determination timer interrupt process 1 .

If the shake correction mode has not been designated (NO in step S2701), the lens control unit 203 proceeds to the processing of step S2703. Note that the processing of steps S2703 to S2712 shown in FIG. 27 is the same as the processing of steps S2501 to S2510 shown in FIG. 25, so description thereof will be omitted here.

FIG. 28 is a flowchart for explaining shake correction mode determination timer interrupt processing 3 performed in the lens unit in the camera according to the seventh embodiment of the present invention.

When shake correction mode determination timer interrupt processing 3 is started, the lens control unit 203 performs shake correction unit mode operation unit input reflection processing (step S2801). After that, the lens control unit 203 determines whether or not the shake correction mode in the lens unit 200 has been designated by the shake correction mode operation unit 206 (step S2802). If designated (YES in step S2802), the lens control unit 203 terminates shake correction mode determination timer interrupt processing 3. FIG.

On the other hand, if not specified (NO in step S2802), the lens control unit 203 proceeds to the process of step S2803. Note that the processing of steps S2803 to S2812 shown in FIG. 28 is the same as the processing of steps S2601 to S2610 shown in FIG. 26, so description thereof will be omitted here.

FIG. 29 is a flowchart for explaining shake correction section mode operation section input reflection processing shown in FIG.

When the shake correction mode operation unit input reflection process is started, the lens control unit 203 determines whether shake correction OFF is specified by the shake correction mode operation unit 206 (step S2901). If shake correction OFF is not designated (NO in step S2901), the lens control unit 203 determines whether or not the "following shot mode" is designated as the designated correction mode by the shake correction mode operation unit 206 ( step S2902).

If the "panning mode" is not specified (NO in step S2902), the lens control unit 203 determines whether or not the "correction mode only during exposure" is specified by the shake correction mode operation unit 206 ( step S2903). If the “correction mode only during exposure” is not specified (NO in step S2903), the lens control unit 203 assumes that the shake correction mode operation unit 206 has not specified a shake correction mode, and performs shake correction mode operation unit input reflection processing. finish.

If shake correction OFF is specified (YES in step S2901), the lens control unit 203 sets the determination result of the shake correction mode in the lens unit 200 to "shake correction OFF mode". Then, the lens control unit 203 sets the shake correction mode in the lens driving unit 204 to the "shake correction OFF mode" (step S2904).

If the "following mode" is specified (YES in step S2902), the lens control unit 203 sets the determination result of the shake correction mode in the lens unit 200 to the "following mode". Then, the lens control unit 203 sets the shake correction mode in the lens driving unit 204 to the "panning mode" (step S2905).

If the “correction mode only during exposure” is specified (YES in step S2903), the lens control unit 203 sets the determination result of the blur correction mode in the lens unit 200 to “correction mode only during exposure”. Then, the lens control unit 203 sets the shake correction mode in the lens driving unit 204 to "correction mode only during exposure" (step S2906).

After the process of step S2904, S2905, or S2906, the lens control unit 203 transmits the determination result of the blur correction mode in the lens unit 200 to the system control unit 120 (step S2907). Then, the lens control unit 203 notifies the system control unit 120 that the shake correction mode for the lens unit 200 has been designated by the shake correction mode operation unit 206 (step S2908). After that, the lens control unit 203 ends the shake correction mode operation unit input reflection processing.

Thus, in the seventh embodiment of the present invention, when the shake correction mode is designated in the lens unit 200, the designated shake correction mode is given priority, and the camera body 100 and the lens unit 200 are set to the shake correction mode. match. As a result, both the camera body 100 and the lens unit 200 can perform shake correction in the shake correction mode specified by the user.

Further, in the seventh embodiment, the lens unit 200 is provided with the shake correction mode operation section 206, but the camera body 100 may be provided with the shake correction mode operation section. In this case, when the camera body 100 designates the shake correction mode, the lens control unit 203 gives priority to the shake correction mode designated by the camera body 100, and matches the shake correction modes of the camera body 100 and the lens unit 200. Let

In the above seven embodiments, an example of performing electronic shake correction for correcting an image has been described as shake correction of the camera body. You may make it correct|amend.

Although the present invention has been described above based on the embodiments, the present invention is not limited to these embodiments, and various forms without departing from the scope of the present invention are also included in the present invention. .

For example, the functions of the above embodiments may be used as a control method, and this control method may be executed by the camera body (imaging device body) or lens unit. Alternatively, a program having the functions of the above-described embodiments may be used as a control program, and the control program may be executed by a computer provided in the camera body or the lens unit. Note that the control program is recorded in, for example, a computer-readable recording medium.

[Other embodiments]
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in the computer of the system or apparatus reads and executes the program. It can also be realized by processing to It can also be implemented by a circuit (for example, ASIC) that implements one or more functions.

100 camera body (imaging device body)
120 system control unit 123 image processing unit 151 shake detection unit 200 lens unit 203 lens control unit 204 lens drive unit 205 shake detection unit

Claims (15)

A lens unit attachable to an imaging device,
a photographic lens and
a first detection means for detecting a shake of the lens unit to obtain a first detection result;
first image blur correction means for performing image blur correction by driving and controlling the photographing lens based on the first detection result;
setting means for setting a correction mode of the first image blur correction means from among a plurality of correction modes;
and a communication means for communicating with the imaging device,
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and selection means for selecting the correction mode of the second image blur correction means based on
The communication means receives information indicating the correction mode selected by the selection means from the imaging device,
The lens unit, wherein the setting means sets the correction mode of the first image blur correction means based on the first detection result and the correction mode selected by the selection means. When the information indicating the selected correction mode is received by the communication means, the setting means sets the correction mode of the first image blur correction means based on the selected correction mode. 2. The lens unit according to claim 1, characterized in that: A lens unit attachable to an imaging device,
a photographic lens and
a first detection means for detecting a shake of the lens unit to obtain a first detection result;
first image blur correction means for performing image blur correction by driving and controlling the photographing lens based on the first detection result;
setting means for setting a correction mode of the first image blur correction means from among a plurality of correction modes;
and a communication means for communicating with the imaging device,
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and selection means for selecting the correction mode of the second image blur correction means based on
The setting means receives second reliability information indicating reliability of a detection result by the second shake detection sensor from the imaging device via the communication means, and sets the reliability indicated by the second reliability information. and setting the correction mode of the first image blur correction means based on the correction mode selected by the selection means when the reliability is higher than the reliability of the first detection result. lens unit. When the reliability indicated by the second reliability information is higher than the reliability of the first detection result, the setting means selects a mode for performing correction by the second image blur correction means by the selection means. 4. A mode according to claim 3, wherein when it indicates that it is selected, the mode for performing correction by said first image blur correction means is set as the correction mode of said first image blur correction means. lens unit. When the reliability of the first detection result is higher than the reliability indicated by the second reliability information, the setting means selects a correction mode based on the first detection result. The lens unit according to claim 3 or 4. When the reliability of the first detection result is higher than the reliability indicated by the second reliability information, the communication means transmits information indicating the correction mode selected based on the first detection result. 6. The lens unit according to claim 5, which transmits to an imaging device. The setting means is capable of selecting a correction mode based on the first detection result at predetermined time intervals and setting the selected correction mode as the correction mode of the first image blur correction means. 7. The lens unit according to any one of claims 1 to 6, characterized by: 8. The lens unit according to claim 7, wherein the communication means transmits the current selection result to the imaging device when the current selection result by the setting means is different from the previous selection result. wherein said communication means transmits information indicating a correction mode of said first image blur correction means to said imaging apparatus after transmitting information indicating a type of said lens unit to said imaging apparatus; Item 9. The lens unit according to any one of Items 1 to 8. The plurality of correction modes include at least a correction mode for performing image blur correction based on the first detection result and a correction mode for stopping image blur correction based on the first detection result;
When the correction mode is selected based on the first detection result, the setting means performs correction by the first image blur correction means when the first detection result exceeds a predetermined threshold. 10. The lens unit according to any one of claims 2 to 9, wherein a mode is selected. a designation means for allowing a user to designate one of the plurality of correction modes as a designated correction mode;
11. The lens according to any one of claims 1 to 10, wherein when the specified correction mode is specified by the specifying means, the communication means sends information indicating the specified correction mode to the imaging device. unit. A control method for a lens unit that can be attached to an imaging device and that includes a photographic lens,
a first detection step of detecting vibration of the lens unit to obtain a first detection result; and a first image blur correction step of driving and controlling the photographing lens based on the first detection result to correct image blur. a correction step;
a setting step of setting a correction mode for the first image blur correction step from among a plurality of correction modes;
and a communication step of communicating with the imaging device,
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and selection means for selecting the correction mode of the second image blur correction means based on
In the communicating step, information indicating the correction mode selected by the selection means is received from the imaging device;
The control method, wherein, in the setting step, a correction mode for the first image blur correction step is set based on the first detection result and the correction mode selected by the selection means. A control method for a lens unit that can be attached to an imaging device and that includes a photographic lens,
a first detection step of detecting vibration of the lens unit to obtain a first detection result; and a first image blur correction step of driving and controlling the photographing lens based on the first detection result to correct image blur. a correction step;
a setting step of setting a correction mode for the first image blur correction step from among a plurality of correction modes;
and a communication step of communicating with the imaging device,
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and a selection means for selecting a correction mode of the second image blur correction means based on the second selection means indicating the reliability of the detection result by the second shake detection sensor from the imaging device in the communication step. Reliability information is received, and if the reliability indicated by the second reliability information is higher than the reliability of the first detection result, in the setting step, the correction mode selected by the selection means is selected. and setting the correction mode of the first image blur correction step based on the above. A control program that is applied to a lens unit that includes a photographing lens and that can be attached to an imaging device, wherein a computer included in the lens unit includes:
a first detection step of detecting vibration of the lens unit to obtain a first detection result; and a first image blur correction step of driving and controlling the photographing lens based on the first detection result to correct image blur. a correction step;
a setting step of setting a correction mode for the first image blur correction step from among a plurality of correction modes;
a communication step of communicating with the imaging device;
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and selection means for selecting the correction mode of the second image blur correction means based on
In the communicating step, information indicating the correction mode selected by the selection means is received from the imaging device;
The control program, wherein in the setting step, the correction mode of the first image blur correction step is set based on the first detection result and the correction mode selected by the selection means. A control program that is applied to a lens unit that includes a photographing lens and that can be attached to an imaging device, wherein a computer included in the lens unit includes:
a first detection step of detecting vibration of the lens unit to obtain a first detection result; and a first image blur correction step of driving and controlling the photographing lens based on the first detection result to correct image blur. a correction step;
a setting step of setting a correction mode for the first image blur correction step from among a plurality of correction modes;
a communication step of communicating with the imaging device;
The imaging device includes a second shake detection sensor, second image shake correction means for performing image shake correction based on the detection result of the second shake detection sensor, and the detection result of the second shake detection sensor. and a selection means for selecting a correction mode of the second image blur correction means based on the second selection means indicating the reliability of the detection result by the second shake detection sensor from the imaging device in the communication step. Reliability information is received, and if the reliability indicated by the second reliability information is higher than the reliability of the first detection result, in the setting step, the correction mode selected by the selection means is selected. a control program for setting the correction mode of the first image blur correction step based on the above.

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