JP4516456B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging apparatus, and more particularly to a digital camera and digital video camera equipped with a camera shake correction mechanism.

  Various camera shake correction methods have been proposed in which camera shake vibration is detected using an angular velocity sensor, image data, and the like, and image blur is corrected based on the output. As a method of camera shake correction, a part of the photographic optical system or the image sensor is mechanically shifted independently in the horizontal and vertical directions in a plane perpendicular to the optical axis in the direction to cancel the shake, There is a known method of suppressing the blur of the camera.

  In addition, an electronic hand that fluctuates the image output range so as to capture a range wider than the image output range and cancel the movement amount between frames of the subject image formed by the imaging optical system caused by the blur of the imaging device. The blur correction method is also widely used mainly in video cameras.

Furthermore, when the above-described two camera shake correction methods are combined to aim at a subject to be displayed and photographed, an electronic camera shake correction method is used, and when the photographer presses the release button to record an image A method of preventing excessive energy consumption by switching to a typical camera shake correction is known (for example, see Patent Document 1).
JP 2000-69351 A

  However, in the correction method described in Patent Document 1, electronic camera shake correction cuts out a part of the imaging range and suppresses camera shake, whereas mechanical camera shake correction is The entire imaging range can be recorded. Therefore, the angle of view displayed when aiming at the subject is different from the angle of view of the recorded image to be recorded, and there is a problem that a photograph with an angle of view not intended by the photographer is taken.

  Accordingly, an object of the present invention is to provide an imaging apparatus that can obtain a photographed image having an angle of view intended by a photographer in an imaging apparatus that uses both electronic camera shake correction and mechanical camera shake correction.

That according to Claim 1 invention, the projection optical system shooting, imaging means for generating an image signal by photoelectrically converting an object image the photographing optical system forms, given the image signal said imaging means has generated Processing means for generating image data by performing processing, recording means for recording image data generated by the processing means, display means for displaying a subject image based on an imaging signal generated by the imaging means, An image generated between frames by changing the cutout position of an image pickup signal output at a predetermined frame rate from the image pickup means based on the shake detection means for detecting the shake of the photographing apparatus and the output of the shake detection means a first shake correction means for correcting the blurring, based on the output of said shake detecting means be to change the portion of the image pickup means or the image-pickup optical system, generated during the exposure operation That a second shake correction means for correcting an image blur, when displaying the object image on the display means before the photographing operation in the moving image by operating the first blur correction means, the still image during photographing operation anda control means Ru is operated the second shake correction means, the control means causes the image data to the processing means has generated, the photographing operation at the start of the first shake correction means and grant the clipping position information, wherein the benzalkonium be recorded to said recording means.

According to a second aspect of the invention, a projection optical system shooting, imaging means for generating an image signal by photoelectrically converting an object image the photographing optical system forms a predetermined process on an image pickup signal the image pickup means is generated Processing means for generating image data by performing processing, recording means for recording image data generated by the processing means, display means for displaying a subject image based on an imaging signal generated by the imaging means, and photographing A blur detection unit for detecting a blur of the apparatus, and by changing a cutout position of an imaging signal output at a predetermined frame rate from the imaging unit based on an output of the blur detection unit, an image generated between frames is changed. first and blur correction means, based on an output of said shake detecting means be to change the portion of the image pickup means or the image-pickup optical system, an image generated during the exposure operation for correcting the shake A second blur correction unit that corrects blur; and when the subject image is displayed as a moving image on the display unit before the shooting operation, the first blur correction unit is operated to perform a still image shooting operation. is provided with a control means Ru is operated the second shake correction means, wherein said control means, in response to the cut-out position information from the imaging operation start of the first shake correction means, said processing means the image data trimming characterized and Turkey be recorded to said recording means.

  According to a third aspect of the present invention, in the first aspect of the present invention, the image data is read from the recording means, and a predetermined area of the image data is defined according to the cutout position information recorded together with the image data. The image display device further includes an image reproducing unit to be displayed on the display unit.

  The invention described in claim 4 is the invention described in claim 1, wherein the image data can be read and trimmed and edited from the recording means, and the cut-out position information recorded together with the image data is Trimming means for displaying the image data as a trimming area on the display means is further provided.

  According to a fifth aspect of the present invention, in the first aspect of the invention, the cut-out position information of the first blur correction unit at the start of the photographing operation is recorded as header information of image data. Features.

  According to the present invention, it is possible to provide an imaging apparatus capable of obtaining a photographed image having an angle of view intended by a photographer in an imaging apparatus using both electronic camera shake correction and mechanical camera shake correction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a camera system as an imaging apparatus according to the first embodiment of the present invention.

  In FIG. 1, the camera system is mainly composed of a lens unit 10 and a body unit 20.

  The lens unit 10 includes a photographic lens 11, a lens frame 12 that supports the photographic lens 11, a shutter 13, a shutter drive mechanism 14, a lens drive mechanism 15, a lens drive circuit 16, and a shutter drive circuit 16. It is comprised.

  The photographing lens 11 forms an imaging optical system, receives an output from the lens driving circuit 16, and is driven in the optical axis direction by a DC motor (not shown) existing in the lens driving mechanism 15. Thereby, adjustments such as zoom and focus are performed. The shutter 13 receives an output from the shutter drive circuit 17 and is driven by a motor (not shown) in the shutter drive mechanism 14. The lens driving circuit 16 and the shutter driving circuit 17 are controlled in accordance with commands from a camera control controller 25 described later.

  On the other hand, the body unit 20 is configured as follows.

  An optical low-pass filter 21 and a CCD unit 22 for photoelectrically converting a subject image that has passed through the optical system are provided on the optical axis of the imaging optical system. The shutter drive circuit 17 drives the shutter 13 during photographing. Then, the light flux that has passed through the photographing lens 11 is imaged on the imaging surface of the CCD unit 22.

  The body unit 20 includes a camera control controller (hereinafter abbreviated as Mμcom) 25 that controls the control operation of the entire camera. The Mμcom 25 has an image processing circuit 24 that is a processing means for performing image processing. Image data from a CCD interface circuit 23 connected to the CCD unit 22 is input to the image processing circuit 24.

  In addition to the CCD interface circuit 23, the Mμcom 25 is connected to an SDRAM 31, a FlashRom 32, a recording medium 33 provided as a storage area, a liquid crystal monitor 35, and the like. These are configured so as to be able to provide an electronic imaging function and an electronic recording display function together with the image processing circuit 24.

  The image data is converted into a video signal by the image processing circuit 24, and then output and displayed on a liquid crystal monitor 35 as display means. The operator can confirm from the display image on the liquid crystal monitor 35 the image at the time of live view display (live view display) before shooting and the shot image.

  The SDRAM 31 is a memory for temporarily storing image data, and is used as a work area when image data is converted. This image data is set to be stored in the recording medium 33 after being converted into JPEG data or the like.

  The recording medium 33 is an external recording medium such as various memory cards or an external hard disk drive (HDD) that can be attached to and detached from the body unit 20 via a camera interface (not shown). Further, as other storage areas, a nonvolatile memory 36 made of, for example, an EEPROM is provided so as to be accessible from the Mμcom 25 as nonvolatile storage means for storing predetermined control parameters necessary for camera control.

  The Mμcom 25 further includes a strobe device 29 via a strobe control circuit 28, a camera shake correction unit 38, a camera operation switch (SW) 40, a battery 42 serving as a power source via a power supply circuit 41, and the above-mentioned. A lens driving circuit 16 and a shutter driving circuit 17 are connected.

  The strobe device 29 is a flash light emitting device that has a flash light emitting tube (not shown) and irradiates a subject with flash light. Then, in the strobe control circuit 28, charge control necessary for light emission from the flash light emission tube of the strobe device 29 and light emission control of the strobe device 29 are performed.

  The camera shake correction unit 38 is for correcting camera shake based on an instruction from the Mμcom 25. The details of the camera shake correction unit 38 will be described later.

  The camera operation switch 40 includes a switch group including operation buttons necessary for operating the camera, such as a release switch for instructing execution of a shooting operation, a mode change switch for switching a shooting mode and an image display mode, and a power switch. Consists of.

  Further, the power supply circuit 41 is provided for converting the voltage of the battery 42 as a power supply into a voltage required for each circuit unit of the camera system and supplying it.

  FIG. 2 is a block diagram showing a configuration of the camera shake correction unit 38 shown in FIG.

  In FIG. 2, the camera shake correction unit 38 is connected to the CCD unit 22. The camera shake correction unit 38 includes a camera shake correction control microcomputer (hereinafter abbreviated as Tμcom) 60, a camera shake detection unit 61, a camera shake correction drive circuit 62, and a camera shake correction drive circuit 62. A correction drive mechanism 63 and a position detection sensor 64 are included.

  In the Tμcom 60, blur correction is controlled, and an operation is performed in accordance with an instruction from the Mμcom 25 that is electrically connected to the Tμcom 60. Camera shake is detected by a shake detection unit 61 that is a shake detection means, and is input to the Tμcom 60. In Tμcom 60, the amount of blur correction is calculated based on the input signal.

  When the operator instructs the start of the still image shooting preparation operation, a signal corresponding to the blur correction amount is transmitted to the Mμcom 25 via the communication line. In Mμcom 25, based on the received signal corresponding to the amount of blur correction, the image processing circuit 24 is instructed about the image cutout position for blur correction, and the live view image with the blur corrected is displayed on the liquid crystal monitor 35.

  When the start of still image shooting is instructed by the operator, a signal corresponding to the blur correction amount is transmitted to the blur correction drive circuit 62. The CCD unit 22 is driven by a motor (not shown) in the shake correction drive mechanism 63. This motor is operated by an electric signal generated by the blur correction drive circuit 62. Further, the drive position of the CCD unit 22 is detected by the position detection sensor 64, and sent from here to the Tμcom 60 for feedback control.

  Next, with reference to a flowchart of FIG. 3A, an operation example in the still image shooting mode of the camera system in the present embodiment will be described.

  When the camera is set to the still image shooting mode by the operator, this routine is started. First, in step S1, output of live view display on the liquid crystal monitor 35 is started. Next, in step S2, the operator waits for a half-pressing operation (first release; 1R) of the shutter button corresponding to the release switch, instructing the start of the still image shooting preparation operation by the operator. If the first release is turned on, the process proceeds to step S3.

  In step S3, the operation of the blur detection unit 61 is started. Thereafter, in step S4, the blur correction amount calculation is started. The blur correction amount calculated here is transmitted to Mμcom 25 in step S5. In subsequent step S6, the live view image is corrected for blur by changing the cutout position of the image formed on the CCD unit 22 by an amount corresponding to the blur correction amount.

  Here, in step S7, the first release state is detected. As a result, as long as the first release is on, blur correction of the live view image is always performed. On the other hand, when the first release is turned off, the live view image correction is completed, and the process proceeds to step S2 to return to the first release waiting state.

  In step S8, the state of the full press operation (second release; 2R) of the shutter button corresponding to the release switch is detected. Then, when the second release is turned on while the first release is on, the process proceeds to step S9, and the cut-out position of the live view image immediately before is stored in a RAM (not shown) in the Mμcom 25. Next, the display of the live view image ends in step S10. On the other hand, if the second release is not on in step S8, the display of the live view image is continued.

  Thereafter, in step S11, the transmission destination of the blur correction amount is switched from the Mμcom 25 to the blur correction drive circuit 62. Next, in step S12, the blur correction drive mechanism 63 is driven, and shift correction of the CCD unit 22 is started.

  Next, in step S13, an exposure operation is performed. When this exposure operation ends, shift correction of the CCD unit 22 is stopped and driven to the initial position in step S14. Thereafter, in step S15, the display of the live view image is started again. In step S16, the captured still image is converted into JPEG data inside the Mμcom 25, and the above-described image cutout position is recorded on the recording medium 33 together with the image data as header information compliant with Exif.

  For example, in FIG. 4, when the imaging range is 70 and the image output range is 71, a subject image 72 formed on the CCD unit 22 before the occurrence of camera shake is shown in FIG. It becomes like this. FIG. 4B is a diagram illustrating a state in which the position of the subject 72 has moved due to blurring, and FIG. 4C is a diagram illustrating a state in which the image output range 71 has moved by the amount of movement of the subject 72.

  When the image cut-out position immediately before the exposure of the still image is the position shown in FIG. 4C, the coordinates of the positions of the two points A and B shown in FIG. 5A are recorded. Thereafter, the process proceeds to step S2 to enter the first release waiting state.

  In addition, the captured still image is converted into JPEG data after the image portion displayed just before shooting is cut out according to the image cut-out position stored in the Mμcom 25, and is recorded on the recording medium 33. You may do it.

  In this case, the operation process in the still image shooting mode of the camera system according to the present embodiment may be performed according to the flowchart of FIG. The flowchart in FIG. 3B is the same as the flowchart in FIG. 3A except that step S16 in the flowchart in FIG. 3A is replaced with step S16 ′. Therefore, the operation process in steps S1 to S15 is the same as that in FIG.

  That is, in step S16 ′, image data is trimmed according to the cut-out position information, and an image file is created from the trimmed image and stored in the recording medium 33.

  Next, an operation example when the camera is set to the still image reproduction mode or the image trimming mode by the operator will be described with reference to the flowchart of FIG.

  When the camera is set to the still image reproduction mode or the image trimming mode by the operator, first, in step S21, the initial value of the frame number of the image to be reproduced, that is, the frame number of the last photographed image is set. Is done. In step S22, the image data of the frame number set in step S21 is read from the recording medium 33. In step S23, the header cut-out position information is read out, and a frame indicating the cut-out position information is synthesized on the image and displayed on the liquid crystal monitor 35.

  For example, when the reproduction of the image of the subject 78 shown in FIG. 5A is selected, the image is as shown in FIG. That is, when the cutout image range is 76 with respect to the entire recorded image range 75, an image including the subject 78 is displayed together with the frame 77.

  Next, in step S24, it is determined whether or not a frame number change switch (SW) (not shown) in the camera operation switch 40 has been operated by the operator. If the frame number change switch is operated, the process proceeds to step S25, and if not operated, the process proceeds to step S26.

  In step S25, the frame number is increased (UP) / down (DOWN) in accordance with the operation of the switch, and the image displayed on the liquid crystal monitor 35 is changed. Thereafter, the process proceeds to step S22.

  In step S26, it is determined whether or not a trimming position setting switch (SW) (not shown) in the camera operation switch 40 has been operated. When the trimming position setting switch is operated, the process proceeds to step S27, and the position of the frame indicating the cutout position information displayed on the liquid crystal monitor 35 is changed according to the operation of the switch. Thereafter, the process proceeds to step S28. If the trimming position setting switch is not operated in step S26, step S27 is skipped.

  In step S28, it is determined whether or not a storage switch (SW) (not shown) in the camera operation switch 40 has been operated by the operator. If the storage switch is not operated, the process proceeds to step S24 and the subsequent processing is repeated. On the other hand, if the storage switch is operated, the process proceeds to step S29.

  In step S29, the image data is trimmed according to the frame position indicating the cutout position information, and converted into a JPEG file. In step S30, data is stored in the recording medium 33. Thereafter, the process proceeds to step S24, and the subsequent processing is repeated.

  As described above, according to the first embodiment, even when the angle of view of the live view image display immediately before shooting a still image and the shot still image are different from the intention of the photographer, the intended angle of view is displayed. The still image can be easily reproduced.

  In the first embodiment described above, the camera shake correction unit is provided on the body unit 20 side and the CCD unit 22 is driven to perform the camera shake correction. However, the present invention is not limited to this.

  For example, as shown in FIG. 7, a camera shake correction unit may be provided on the lens unit side, and the camera shake correction may be performed by shifting a part of the photographing lens.

  In FIG. 7, a blur correction lens 51 is provided between the photographing lens 11 and the shutter 13 in the lens unit 50. The shake correction lens 51 is driven in a direction orthogonal to the optical axis of the shake correction lens 51 by a camera shake correction unit.

  Since the configuration of the other parts of the camera system shown in FIG. 7 and the basic operation of the system are the same as those in the first embodiment shown in FIGS. 1 to 6, these configurations and operations are as follows. The same parts are denoted by the same reference numerals, and illustration and description thereof are omitted.

  FIG. 8 is a diagram illustrating an example in which the above-described cutout position information is recorded in a separate file instead of the image header.

  As a method for recording the image cut-out position information, there is a method for storing the image cut-out position information as a separate file in association with the image, as shown in FIG. 8, in addition to the method for recording as the header information of the image file.

  In FIG. 8, two folders 82 and 83 are formed under the DCIM of a folder (directory) 81 for recording images. For example, 100IMG of the folder 82 stores image files (for example, JPEG files) 1, 2, 3,. Also. In the TRIIMMG of the folder 83, files of cut-out position information 1, 2, 3,... That are files in which management information is recorded are stored in, for example, a TEXT file format.

  The correspondence between the image file and the cutout position information file is made by a number attached to the file name. For example, the cut-out position information of “image file 3” is stored in “cut-out position information 3”.

  As described above, the image cutout position information may be stored as a separate file in association with the image.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 9 is a block diagram showing a camera system configuration as an imaging apparatus according to the second embodiment of the present invention.

  In FIG. 9, the camera system mainly includes a detachable lens unit 90 and a body unit 100.

  The lens unit 90 includes a photographing lens 91, a diaphragm 92, a lens driving mechanism 93, a diaphragm driving mechanism 94, and a lens control microcomputer (hereinafter abbreviated as Lμcom) 95. .

  The photographic lens 91 receives an output from the lens driving mechanism 93 and is driven in the optical axis direction by a DC motor (not shown) existing in the lens driving mechanism 93. Thereby, adjustments such as zoom and focus are performed. The diaphragm 92 receives an output from the diaphragm driving mechanism 94 and is driven by a motor (not shown) in the diaphragm driving mechanism 94. The lens driving mechanism 93 and the aperture driving mechanism 94 are controlled by the Lμcom 95 in accordance with a command from a camera body control microcomputer 125 described later.

  On the other hand, the body unit 100 is configured as follows.

  A light beam from a subject (not shown) that is incident through a photographing lens 91 and a diaphragm 92 in the lens unit 90 is reflected by a quick return mirror 101 as a first mirror, and is reflected by a second mirror 102, a third mirror 103, and a fourth mirror. It reaches an eyepiece (eyepiece) 105 of the eyepiece optical system via a finder optical system (see FIGS. 10 to 12, details will be described later) including a mirror 104 and the like. Further, a part of the subject light beam reflected by the quick return mirror 101 is guided to the AF sensor unit 107 and the photometric sensor 108 which are focus position detecting means for performing automatic distance measurement via the second mirror 102.

  Behind the quick return mirror 101 is a focal plane shutter 111, an optical low-pass filter 112, and a CCD unit 113 for photoelectrically converting a subject image that has passed through the optical system on the optical axis of the photographing lens 91. Is provided. That is, when the quick return mirror 101 is retracted from the optical path, the light flux that has passed through the photographing lens 91 and the diaphragm 92 is imaged on the imaging surface of the CCD unit 113.

  Note that the longitudinal direction of the CCD imaging range of the CCD unit 113 coincides with the longitudinal direction of the camera (body unit 100). Further, the longitudinal direction of the photographing field range of the camera system is also the same as the longitudinal direction of the camera.

  The body unit 100 includes an image processing controller 116 for performing image processing. The image processing controller 116 includes a CCD interface circuit 115 connected to the CCD unit 113 and an SDRAM 118 provided as a storage area. , FlashRom 119, recording medium 120, liquid crystal monitor 121, and the like are connected.

  Further, an image processing controller 124 is connected to the liquid crystal monitor 121. The image processing controller 124 is connected to an imaging unit 129 disposed on the back surface of a third mirror 103 described later via a CCD interface circuit 128. These are configured to provide an electronic recording display function together with an electronic imaging function.

  The recording medium 120 is an external recording medium such as various memory cards or an external hard disk drive (HDD) that can be attached to and detached from the body unit 100 via a camera interface (not shown).

  The image processing controllers 116 and 124 include a photometric sensor 108 via a photometric circuit 130, a strobe device 132 via a strobe control circuit 131, an AF sensor drive circuit 133, a mirror drive mechanism 134, and a shutter control circuit 135. A shutter charge mechanism 136, a nonvolatile memory (EEPROM) 137, and the like are connected to a body control microcomputer (hereinafter abbreviated as Bμcom) 125 for controlling each part in the body unit 100.

  The Bμcom 125 is further connected to an operation display LCD 141 for notifying the photographer of the operation state of the camera by display output, a camera operation switch (SW) 142, and a battery 144 via a power supply circuit 143. ing.

  The Bμcom 125 and the Lμcom 95 are electrically connected to each other via the communication connector 126 when the lens unit 90 is mounted. As a digital camera, the Lμcom 95 is operated in cooperation with the Bμcom 125 in a dependent manner.

  The photometric circuit 130 is a circuit that performs photometric processing based on the electrical signal of the photometric sensor 108. The mirror driving mechanism 134 is a mechanism for driving and controlling the quick return mirror 101, and the AF sensor driving circuit 133 is a circuit for driving and controlling the AF sensor unit 107.

  The shutter charge mechanism 136 charges a spring that drives the front curtain and the rear curtain of the shutter 111. The shutter control circuit 135 controls the movement of the front curtain and the rear curtain of the shutter 111, and exchanges a signal for controlling the opening / closing operation of the shutter and a signal synchronized with the strobe with the Bμcom 125.

  The non-volatile memory 137 is a storage unit that stores predetermined control parameters required for camera control as a storage area other than the SDRAM 118, the FlashRom 119, and the recording medium 120 described above, and is provided so as to be accessible from the Bμcom 125.

  The strobe device 132 is a flashlight device that has a flashlight tube (not shown) and irradiates a subject with flashlight. Then, in the strobe control circuit 131, charge control necessary for light emission of the flash tube of the strobe device 132 and light emission control of the strobe device 132 are performed.

  The operation display LCD 141 is used to notify the operator of the operation state of the camera by display output. The camera operation switch 142 serves as switching means, for example, a release switch for instructing execution of a shooting operation and switching the quick return mirror 101 in and out of the shooting optical path as will be described later, a mode change switch for switching between the shooting mode and the image display mode, and power The switch group includes a switch group including operation buttons necessary for operating the camera.

  Further, the power supply circuit 143 is provided for converting the voltage of the battery 144 as a power supply into a voltage required by each circuit unit of the camera system and supplying the converted voltage.

  Next, the finder optical system described above will be described with reference to FIGS.

  FIGS. 10 to 12 show the arrangement in the finder observation state in the second embodiment, in which the main components of the finder optical system and the AF sensor unit 107 are incorporated in the camera body. FIG. 11 is a front view as seen from the photographic lens side, FIG. 11 is a view as seen from the upper surface side of the camera body, and FIG. 12 is a perspective view showing the arrangement of main components.

  In the following description, the normal use state of the camera, that is, the state of the camera when the photographer holds the camera at the time of normal photographing, is the horizontal position, and the longitudinal direction of the body unit 100 is the longitudinal direction of the visual field range. To match the horizontal direction.

  The finder optical system includes a plurality of mirrors for guiding a light beam from a subject that has passed through the photographing lens 91 in the lens unit 90 to the eyepiece 105, that is, a quick return mirror 101 as a first mirror, a second mirror 102, A third mirror 103, a fourth mirror 104, and a screen 151 are included.

  The quick return mirror 101 has a first reflecting surface (first optical reflecting surface), and the second mirror 102, the third mirror 103, and the fourth mirror 104 are each a second reflecting surface (second reflecting surface). An optical reflection surface), a third reflection surface (third optical reflection surface), and a fourth reflection surface (fourth optical reflection surface).

  In addition, the 2nd mirror 102 and the 3rd mirror 103 are comprised by the half mirror. Here, the optical member that transmits a part of the light beam at a predetermined ratio is referred to as a half mirror or a semi-transmissive mirror, but it is not necessarily 50%, and may be 30%, for example.

  The light flux from the subject that has passed through the photographing lens 91 reaches the quick return mirror 101 as a first reflecting surface (first optical reflecting surface) that can be rotated in the direction of the arrow C in the drawing. The quick return mirror 101 is disposed between the photographing lens 91 and the CCD unit 113 in the photographing optical path of the photographing lens 91 as shown by a solid line in FIG. At the time of imaging, the quick return mirror 101 is moved to a position indicated by a two-dot chain line in FIG. 10 by the mirror driving mechanism 134, that is, retracted from the photographing optical path, and the light flux from the subject is converted into the shutter 111, the optical low-pass filter. It is guided to the CCD unit 113 via 112. Reference numeral 114 denotes a seal member for sealing between the CCD unit 113 and the optical low-pass filter 112.

  At the time of observing the subject, the subject luminous flux incident from the photographic lens 91 at the quick return mirror (first reflective surface) 101 serving as the first reflecting member has an angle of about 90 ° with respect to the optical axis of the photographic lens 91. Thus, the light is reflected in a direction along the longitudinal direction of the body unit 100. That is, it is reflected in the right direction in FIG.

  The light beam reflected by the first reflection surface of the quick return mirror 101 forms an image on the screen 151 disposed on the reflection optical axis of the first reflection surface. Further, the light beam from the image on the screen 151 is reflected by the second mirror 102 as the second reflecting member.

  The second mirror 102, which is the second reflecting surface, is on the reflection optical axis from the quick return mirror 101, and the second reflecting surface which is the reflecting surface is the reflected optical axis from the first reflecting surface. On the other hand, they are arranged at a predetermined angle. Then, the reflected light beam from the quick return mirror 101 that has entered the second mirror 102 is reflected upward of the body unit 100 in FIG. 11 by the second reflecting surface of the second mirror 102.

  The light beam reflected by the second reflecting surface of the second mirror 102 is on the reflection optical axis of the second reflecting surface, and the third reflecting surface that is the reflecting surface is the second reflecting surface. Is incident on a third mirror 103 which is disposed at a predetermined angle with respect to the reflected optical axis.

  The reflected light beam from the second mirror 102 that has entered the third mirror 103 that is the third reflecting surface is reflected by the third reflecting surface of the third mirror 103 on the reflected optical axis from the second reflecting surface. The light is reflected in a direction opposite to the reflection direction by the first reflecting surface of the quick return mirror 101 at an angle of approximately 90 °. That is, the reflected light beam from the second reflecting surface of the second mirror 102 is reflected by the third reflecting surface of the third mirror 103 toward the left direction of the body unit 100 in FIG. In other words, the light beam reflected by the first reflecting surface of the quick return mirror 101 is guided by the second and third mirrors 102 and 103 so as to be reflected by the third reflecting surface of the third mirror 103. The optical axis is substantially parallel to the reflected optical axis of the first reflecting surface of the quick return mirror 101.

  The light beam reflected by the third reflecting surface of the third mirror 103 is on the reflection optical axis of the third reflecting surface, and the fourth reflecting surface that is the reflecting surface of the third mirror 103 is the third reflecting surface of the third mirror 103. The light enters the fourth mirror 104 that is disposed at a predetermined angle with respect to the reflected optical axis of the third reflecting surface.

  The reflected light beam from the third mirror 103 that has entered the fourth mirror 104 that is the fourth reflecting surface is reflected by the fourth reflecting surface of the fourth mirror 104 with respect to the reflected optical axis from the third mirror 103. The angle is approximately 90 °, and the light is reflected from the photographing lens 91 in a direction opposite to the incident direction to the quick return mirror 101. That is, the reflected light beam from the third reflecting surface of the third mirror 103 is reflected by the fourth reflecting surface of the fourth mirror 104 upward in FIG. 10, that is, toward the rear of the body unit 100. The reflected optical axis of the fourth reflecting surface is substantially parallel to the optical axis of the photographing lens 91. Further, the light beam reflected by the fourth reflecting surface of the fourth mirror 104 enters the eyepiece 105 disposed on the reflection optical axis of the fourth reflecting surface.

  Thus, the subject luminous flux from the photographic lens 91 is inverted by the first to fourth reflecting surfaces described above so that the image becomes an erect image and guided to the eyepiece 105. As a result, the subject image formed on the screen 151 by the photographer's eyes can be observed through the eyepiece 105.

  An AF sensor unit 107 is disposed on the back side of the second mirror 102. Since the second mirror 102 is constituted by a half mirror, a part of the light beam guided to the screen 151 passes through the second mirror 102 and enters the AF sensor unit 107 as described above.

  The AF sensor unit 107 is arranged to face the screen 151, and constitutes a phase difference type AF sensor unit by dividing the pupil image formed by the secondary imaging lens into the photoelectric element. ing. Here, by disposing the AF sensor unit 107 on the back side of the second reflecting surface of the second mirror 102, it is possible to realize a wide-field AF that covers the entire screen.

  Similarly, the photometric sensor 108 that outputs an electric signal to the light beam from the screen 151 intersects the reflection optical axis of the first reflection surface of the quick return mirror 101 and the second reflection of the second mirror 102. It is provided on the back side of the surface. Based on the electrical signal of the photometric sensor 108, the photometric circuit 130 performs photometric processing.

  An imaging unit 129 is disposed on the back side of the third reflecting surface of the third mirror 103. Since the third mirror 103 is also composed of a half mirror, an image is formed by an optical system that forms a secondary image with respect to the light beam from the screen 151. The formed image is photoelectrically converted by the imaging unit 129, processed by the CCD interface circuit 128 and the image processing controller 127, and then displayed on the liquid crystal monitor 121 as a finder function.

  The imaging unit 129 includes an optical system 129a and a CCD 129b, and is disposed on the back side of the fourth reflecting surface of the fourth mirror 104. Therefore, the imaging unit 129 does not block the light beam of the optical viewfinder, and both the optical viewfinder display and the electronic image display can be easily realized.

  In this embodiment, as shown in FIGS. 10 to 12, the quick return mirror 101, the second mirror 102, the third mirror 103, and the fourth mirror 104 are at an angle of about 90 ° with respect to the incident light beam. Although it arrange | positions so that it may reflect, it is not restricted to this.

  Next, the operation of each part of the camera system configured as described above will be described.

  The image processing controller 116 controls the CCD interface circuit 115 in accordance with a command from the Bμcom 125 and takes in image data from the CCD unit 113. This image data is converted into a video signal by the image processing controller 116 and output and displayed on the liquid crystal monitor 121. The operator can confirm the image of the photographed image from the display image on the liquid crystal monitor 121.

  The SDRAM 118 is a memory for temporarily storing image data, and is used as a work area when image data is converted. The image data is set to be stored in the recording medium 120 after being converted into JPEG data.

  The mirror drive mechanism 134 is a mechanism for driving the quick return mirror 101 to the photographing position and the viewfinder observation position. When the quick return mirror 101 is at the finder observation position, the light beam from the photographing lens 91 is divided and guided to the AF sensor unit 107 side and the finder side by the second mirror 102 constituting the half mirror. The output from the AF sensor in the AF sensor unit 107 is transmitted to the Bμcom 125 via the AF sensor driving circuit 133, and a known distance measurement process is performed.

  In addition, the operator can view the subject from the eyepiece 105 adjacent to the fourth mirror 104. On the other hand, a part of the imaged light flux of the screen 151 that has passed through the second mirror 102 is guided to the photometric sensor 108, and a well-known photometric process is performed by the photometric circuit 130 based on the amount of light detected here.

  In FIG. 2, the camera shake correction unit 140 is configured by replacing the camera control controller (Mμcom) 25 with a body control microcomputer (Bμcom) 125, and replacing the optical low-pass filter 21 and the CCD unit 22 with the optical low-pass filter 112, respectively. Since the configuration is the same as that replaced with the CCD unit 113, the respective constituent members are replaced, and the description of the other configurations will be omitted here with reference to the description of the camera shake correction unit 38 of FIG.

  When the operator instructs the start of the still image shooting preparation operation, a signal corresponding to the blur correction amount is transmitted to the Bμcom 125 via the communication line. In Bμcom 125, based on the received signal corresponding to the amount of blur correction, the image processing controller 124 is instructed of an image cutout position for blur correction, and a live view image with the blur corrected is displayed on the liquid crystal monitor 121.

  When the start of still image shooting is instructed by the operator, a signal corresponding to the blur correction amount is transmitted to the blur correction drive circuit 62. The CCD unit 113 is driven by a motor (not shown) in a shake correction drive mechanism 63 that operates based on an electric signal generated by the shake correction drive circuit 62. The drive position of the CCD unit 113 is detected by the position detection sensor 64 and sent to the Tμcom 60 for feedback control.

  Next, with reference to the flowchart of FIG. 13, an example of the operation at the time of shooting of the camera system in the second embodiment of the present invention will be described.

  When the camera is turned on, first, in step S41, output display of the live view image on the liquid crystal monitor 121 is started. Next, in step S42, a half-press operation (first release; 1R) of the shutter button corresponding to the release switch is waited. Here, when the first release is turned on, the process proceeds to step S43.

  In step S43, the operation of the blur detection unit 61 is started. Thereafter, the blur correction amount calculation is started in step S44. The blur correction amount calculated here is transmitted to Bμcom 125 in step S45. Then, in the subsequent step S46, blur correction of the live view image is performed by changing the cutout position of the image formed on the imaging unit 129 by an amount corresponding to the blur correction amount.

  At step S47, the first release state is detected. As a result, as long as the first release is on, blur correction of the live view image is always performed. On the other hand, when the first release is turned off, the correction of the live view image ends, and the process proceeds to step S42 to return to the first release waiting state.

  In step S48, the state of the fully-pressing operation of the shutter button corresponding to the release switch (second release; 2R) is detected. When the second release is turned on while the first release is kept on, the process proceeds to step S49, and the display of the live view image ends. Further, in step S50, the quick return mirror 101 is retracted from the optical path. On the other hand, if the second release is not on in step S48, the display of the live view image is continued.

  Thereafter, in step S51, the transmission destination of the blur correction amount is switched from Bμcom 125 to the blur correction drive circuit 62. Next, in step S52, the blur correction drive mechanism 63 is driven, and shift correction of the CCD unit 113 is started.

  Next, an exposure operation is performed in step S53, and when this exposure operation is completed, the shift correction of the CCD unit 113 is stopped and driven to the initial position in step S54. Thereafter, when the quick return mirror 101 is returned from the retracted position to the optical path in step S55, the display of the live view image is started again in step S56. After the operation according to the flowchart described above, the captured still image is converted into JPEG data inside the Bμcom 125 and recorded on the recording medium 120.

  Thereafter, the process proceeds to step S42 to enter a 1R wait state.

  Here, the relationship between the CCD unit 113 and the imaging unit 129 will be described with reference to FIG.

  In FIG. 14, the circle shown on the outside is an image circle 155 formed by the lens unit 90. The outer rectangle in the image circle 155 is the imaging range of the imaging unit 129, and the inner rectangle is the imaging range of the CCD unit 113. That is, in the image circle 155, the imaging range of the imaging unit 129 is set wider than the imaging range of the CCD unit 113.

  When displaying a live view image, an image having the same size as the imaging range of the CCD unit 113 in the imaging range of the imaging unit 129 is cut out and displayed on the liquid crystal monitor 121. When the blur correction of the live view image is performed, the cutout of the image is changed using the hatched area shown in FIG. 14 that is the difference between the two imaging ranges.

  As described above, according to the second embodiment, in an imaging apparatus having two types of imaging elements, that is, an imaging element for live view image display and an imaging element for still image shooting, a live view image is displayed. Even when shake correction is performed electronically and pre-correction during still image shooting is performed mechanically, the angle of view of the live view image display and the angle of view of the shot still image can be made the same.

  In the above-described second embodiment, the structure for shifting the position of the CCD is shown as an example of mechanical blur correction. However, the present invention is not limited to this. For example, as shown in FIG. 7, the blur correction lens 51 that is a part of the photographing lens may be shifted in a direction perpendicular to the photographing optical axis.

  As mentioned above, although embodiment of this invention was described, in the range which does not deviate from the summary of this invention other than embodiment mentioned above, this invention can be variously modified.

1 is a block diagram illustrating a configuration of a camera system as an imaging apparatus according to a first embodiment of the present invention. It is a block diagram which shows the structure of the camera-shake correction unit 38 shown by FIG. 6 is a flowchart for explaining an operation example in a still image shooting mode of the camera system according to the first embodiment of the present invention. It is the figure which showed the example of the imaging range and the image output range. It is the figure which showed the example of the whole recording image range and the cutout image range. 10 is a flowchart for explaining an operation example when the camera is set to a still image reproduction mode or an image trimming mode by an operator. It is a block diagram which shows another structural example of the camera system as an imaging device which concerns on the 1st Embodiment of this invention. It is the figure which showed the example which records cutout position information on another file instead of the header of an image. It is a block diagram which shows the camera system structure as an imaging device which concerns on the 2nd Embodiment of this invention. In the second embodiment of the present invention, the finder observation state is shown in which the main components of the finder optical system and the AF sensor unit 107 are incorporated in the camera body, as viewed from the photographing lens side. It is a front view. In the second embodiment of the present invention, the arrangement is shown in the finder observation state in which the main components of the finder optical system and the AF sensor unit 107 are incorporated in the camera body. FIG. In the second embodiment of the present invention, the arrangement of the main components of the finder optical system and the AF sensor unit 107 in the finder observation state is shown in the camera body. It is the shown perspective view. It is a flowchart explaining the operation example at the time of imaging | photography of the camera system in the 2nd Embodiment of this invention. It is a figure explaining the relationship between the CCD unit 113 and the imaging unit 129.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Lens unit, 11 ... Shooting lens, 12 ... Lens frame, 13 ... Shutter, 14 ... Shutter drive mechanism, 15 ... Lens drive mechanism, 16 ... Lens drive circuit, 17 ... Shutter drive circuit, 20 ... Body unit, 21 ... Optical low-pass filter, 22 ... CCD unit, 23 ... CCD interface circuit, 24 ... Image processing circuit, 25 ... Camera control controller (M [mu] com), 28 ... Strobe control circuit, 29 ... Strobe device, 31 ... SDRAM, 32 ... FlashRom, 33 ... Recording medium, 35 ... Liquid crystal monitor, 36 ... Non-volatile memory (EEPROM), 38 ... Camera shake correction unit, 40 ... Camera operation switch (SW), 41 ... Power supply circuit, 60 ... Microcomputer for camera shake correction control ( T.mu.com), 61 ... blur detection unit, 62 ... blur correction drive Circuit 63 ... Blur correction drive mechanism 64 ... Position detection sensor.

Claims (5)

And a projection optical system shooting,
Imaging means for photoelectrically converting the subject image formed by the imaging optical system to generate an imaging signal;
Processing means for generating image data by applying predetermined processing to the imaging signal generated by the imaging means;
Recording means for recording the image data generated by the processing means;
Display means for displaying a subject image based on an imaging signal generated by the imaging means;
Blur detecting means for detecting blur of the photographing apparatus;
A first blur correction unit that corrects a blur of an image generated between frames by changing a cutout position of an imaging signal output at a predetermined frame rate from the imaging unit based on an output of the blur detection unit; ,
A second blur correction unit that corrects a blur of an image generated during an exposure operation by shifting a part of the imaging unit or the imaging optical system based on an output of the blur detection unit;
When displaying the object image on the display means before the photographing operation in the moving image by operating the first blur correction means, in a still image photographing operation is Ru operates the second shake correction means Control means,
The control means, the image data which the processing means is generated, the imaging by applying a cut-out position information of the photographing operation start of the first blur correction means, wherein the benzalkonium be recorded to said recording means device . And a projection optical system shooting,
Imaging means for photoelectrically converting the subject image formed by the imaging optical system to generate an imaging signal;
Processing means for generating image data by performing predetermined processing on the imaging signal generated by the imaging means;
Recording means for recording the image data generated by the processing means;
Display means for displaying a subject image based on the imaging signal generated by the imaging means;
Blur detecting means for detecting blur of the photographing device;
A first blur correction unit that corrects a blur of an image generated between frames by changing a cutout position of an imaging signal output at a predetermined frame rate from the imaging unit based on an output of the blur detection unit; ,
A second blur correction unit that corrects a blur of an image generated during an exposure operation by shifting a part of the imaging unit or the imaging optical system based on an output of the blur detection unit;
When displaying the object image on the display means before the photographing operation in the moving image by operating the first blur correction means, in a still image photographing operation is Ru operates the second shake correction means Control means,
The control means, in response to the cut-out position information from the imaging operation start of the first shake correction means, the processing means imaging apparatus according to claim and Turkey be recorded to said recording means the image data is trimmed .   2. An image reproducing means for reading image data from the recording means and displaying a predetermined area of the image data on the display means in accordance with the cut-out position information recorded together with the image data. The imaging apparatus according to 1.   Trimming means that reads out the image data from the recording means and can perform trim editing, and further displays the cut-out position information recorded together with the image data on the display means together with the image data as a trimming area. The imaging apparatus according to claim 1.   2. The imaging apparatus according to claim 1, wherein the cut-out position information of the first blur correction unit at the start of the photographing operation is recorded as header information of image data.

Images