JP4845796B2 - IMAGING DEVICE AND IMAGING DEVICE CONTROL METHOD - Google Patents

Description

  The present invention relates to an imaging apparatus and a control method for the imaging apparatus.

  When a subject including a subject with high brightness such as sunlight is photographed in outdoor photography, the subject image may include streaky, almost white gradation noise (smear). This smear causes deterioration of the image quality of the photographed image.

In view of this problem, a technique for subtracting the output signal of the pixel in the region where the signal is not read out from the output signal of the pixel in the region where the signal is read out in interlaced scanning such as NTSC is proposed (Patent Document 1). See). As a result, the smear signal component can be corrected to some extent from the output signal of the pixel in the region where the signal is read out.
Japanese Patent Laid-Open No. 1-193012

  However, the technique disclosed in Patent Document 1 may not be able to appropriately correct a smear region where smear has occurred.

  For example, if the angle of view and the shooting range of the image (see the right diagram in FIG. 9) when the smear correction is not changed with respect to the image when the smear occurs (see the left diagram in FIG. 9), the smear signal component By subtracting, an image from which smear has been removed can be obtained. However, for example, when the angle of view of the image (see the right figure in FIG. 10) when the smear is corrected fluctuates with respect to the image when the smear occurs (see the left figure in FIG. 10), the smear signal component is subtracted. Then, the following phenomenon may occur. That is, the target area from which the smear signal component is subtracted is different from the smear area where the smear has occurred, so as shown in the right diagram of FIG. 10, oversubtraction is performed near the end of the smear area and black streaks are generated. .

  On the other hand, in an imaging apparatus capable of program shift, there is also a method of reducing the occurrence of smear by reducing the amount of incident light by performing program shift in the direction of narrowing the aperture when smear occurs. Even with this method, the smear region may not be corrected appropriately.

  For example, when the width of the smear area where smear has occurred is equal to or greater than a predetermined value, when the program shift is performed, smear may not be reduced and thin gray streaks may remain in the subject image.

  An object of the present invention is to provide an imaging apparatus and an imaging apparatus control method that can appropriately correct a smear region.

The image pickup apparatus according to the first aspect of the present invention includes a smear detection unit that detects a smear region in which smear has occurred and detects a width of the smear region from the image data of the subject acquired by the image pickup unit, and the imaging A smear signal component acquisition unit that acquires a smear signal component of the smear from data output from pixels in a non-readout region or a light shielding region of the unit; and a diaphragm that drives the aperture to adjust the amount of light incident on the imaging unit Means, subtraction processing means for subtracting the smear signal component from the image data acquired by the imaging means, and a predetermined condition including that the width of the smear region is less than a predetermined width. When satisfying, it is possible to reduce smear by causing the diaphragm means to throttle, and that the width of the smear area is not less than a predetermined width. If no predetermined conditions are satisfied, a correction control means for controlling the acquired image data by the imaging means to the subtraction processing means so as to perform correction to reduce the smear by subtracting the smear signal component It is characterized by providing.

An image pickup apparatus according to a second aspect of the present invention includes a smear detection unit that detects a smear region where smear has occurred and detects a movement amount of the smear region from image data of a subject acquired by the image pickup unit. A smear signal component acquisition means for acquiring a smear signal component of the smear from data output from pixels in a non-readout area or a light shielding area of the imaging means; and a diaphragm for adjusting the amount of light incident on the imaging means. Including a diaphragm means for driving, a subtraction processing means for subtracting the smear signal component from the image data acquired by the imaging means, and a movement amount of the smear region being less than a predetermined movement amount in advance. When the predetermined condition is satisfied, the subtraction processing unit subtracts the smear signal component from the image data acquired by the imaging unit. The smear is reduced by reducing the smear by causing the throttling means to reduce the smear when a predetermined condition including that the movement amount of the smear region is equal to or greater than a predetermined movement amount is satisfied. And a correction control unit that controls to perform correction.
An imaging apparatus according to a third aspect of the present invention includes a smear detection unit that detects a smear region where smear has occurred from image data of a subject acquired by the imaging unit, and a non-reading region or a light shielding region of the imaging unit. The smear signal component acquisition unit that acquires the smear signal component of the smear from the data output from the pixel, the aperture unit that drives the aperture to adjust the amount of light incident on the imaging unit, and the imaging unit Subtraction processing means for subtracting the smear signal component from the image data obtained, face detection means for detecting a face area recognized as the face of the subject from the image data of the subject, and a position of the smear region, Calculating means for calculating a degree of coincidence indicating the degree of overlap between the smear area and the face area from the position of the face area; and the degree of coincidence is determined in advance. When a predetermined condition including being equal to or higher than a predetermined matching degree is satisfied, smear is reduced by narrowing the diaphragm to the throttling means, and the matching degree is less than a predetermined matching degree. Correction control means for performing control to reduce smear by subtracting the smear signal component from the image data acquired by the imaging means to the subtraction processing means when a predetermined condition is included. It is characterized by providing.

  According to the present invention, it is possible to appropriately correct the smear region.

  An imaging apparatus 100 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of an imaging apparatus 100 according to the first embodiment of the present invention.

  The imaging device 100 is a digital camera, for example. The imaging device 100 includes the following components.

  The operation unit 101 includes switches, buttons, and the like that are operated by an operator of the imaging apparatus 100 to input various instructions to the imaging apparatus 100. The operation unit 101 also includes a shutter switch. When the shutter switch is half-pressed, the signal SW1 is notified from the operation unit 101 to the control unit 102. When the shutter switch is fully pressed, the signal SW2 is notified from the operation unit 101 to the control unit 102.

  The image pickup unit 103 receives light incident through the lens 108a and the diaphragm 109a and generates a charge corresponding to the amount of light. That is, the imaging unit 103 captures an object and acquires an image signal. The imaging means 103 includes an imaging area where a signal is read out (imaged) from a pixel, a non-readout area where a signal is not read out from the pixel, and a light-shielded light-shielding area. In the imaging unit 103, for example, photodiodes (pixels) are arranged in the imaging region and the non-reading region, and a CCD (charge coupled device) is arranged in the light shielding region. Alternatively, in the imaging unit 103, in order to obtain an optical black signal, a photodiode (pixel) may be arranged in a part of the light shielding region.

  The A / D conversion unit 104 performs sampling, gain adjustment, A / D conversion, and the like on the analog image signal output from the imaging unit 103, and outputs a digital image signal (image data).

  The image processing unit 105 performs various types of image processing on the digital image signal (image data) output from the A / D conversion unit 104 and outputs a processed digital image signal (image data). For example, the image processing unit 105 converts the digital image signal received from the A / D conversion unit 104 into a YUV image signal and outputs the YUV image signal. Further, the image processing unit 105 includes a subtraction processing unit 123. The subtraction processing unit 123 can perform smear correction processing by subtracting the smear signal component from the image data corresponding to the image signal acquired by the imaging unit 103. This image data is, for example, data corresponding to an image signal acquired from a pixel in the imaging area of the imaging unit 103. The smear signal component is, for example, data corresponding to an image signal acquired from a pixel in a non-readout area of the imaging unit 103. Or a smear signal component is the data according to the image signal acquired from the pixel of the light-shielding area | region of the imaging means 103, for example.

  The smear detection means 106 detects a smear area where smear has occurred and also detects smear information from the digital image signal received from the A / D converter 104, that is, from the image of the subject. The smear information is information relating to the width of the smear area and the amount of movement. The smear detection unit 106 notifies the control unit 102 of smear information.

  The AF processing unit 108 drives the lens 108a to perform AF processing.

  The AE processing unit 109 drives the aperture 109a to perform AE processing. The AE processing unit 109 includes program shift means 122. For example, the program shift unit 122 can perform smear correction processing by driving the aperture 109a and reducing the aperture 109a.

  Here, the subtraction processing means 123 and the program shift means 122 are smear correction means for performing a plurality of smear correction processes for correcting the levels of pixels included in the smear area by different methods.

  The EF processing unit 110 receives a flash-on instruction from the control unit 102 when the control unit 102 determines that a flash is necessary. The EF processing unit 110 controls the flash unit 111 in response to a flash-on instruction. Thereby, the flash unit 111 emits light.

  The EVF display unit 107 includes a small liquid crystal screen and displays an image according to the image data processed by the image processing unit 105. That is, the EVF display unit 107 functions as an EVF (electronic viewfinder).

  The format conversion unit 112 converts the format of the digital image signal (image data) output from the image processing unit 105 into a format such as JPEG, and outputs the converted format to the image recording unit 113.

  The image recording unit 113 records the format-converted image data received from the format conversion unit 112 in a memory (not shown) in the imaging apparatus 100, an external memory inserted in the imaging apparatus 100, or the like. Do.

  The external connection unit 114 functions as an interface for connecting the imaging device 100 to an external device such as a PC (personal computer) or a printer.

  The control unit 102 controls the operation of each unit of the imaging apparatus 100. The control unit 102 controls each unit in response to an instruction from the operation unit 101, for example. The control unit 102 includes correction control means 124. The correction control means 124 selects one of a plurality of smear correction processes (a smear correction process by the subtraction process means 123 and a smear correction process by the program shift means 122) according to the smear information, and the smear correction means (122, 123). ).

  Next, the operation of the imaging apparatus 100 when shooting using the imaging apparatus 100 will be described.

  When the operator of the imaging apparatus 100 turns on the power switch included in the operation unit 101, the control unit 102 detects this and supplies power to each unit constituting the imaging apparatus 100. When power is supplied to each part constituting the imaging apparatus 100, a shutter (not shown) is opened, so that an optical image of the subject is formed on the imaging means 103 via the lens 108a and the diaphragm 109a. That is, the imaging unit 103 captures an object and acquires an image signal. The imaging unit 103 outputs the acquired analog image signal to the A / D conversion unit 104.

  The A / D conversion unit 104 performs sampling, gain adjustment, A / D conversion, and the like on the analog image signal output from the imaging unit 103 to generate and output a digital image signal.

  The smear detection means 106 detects a smear area and smear information from the image of the subject indicated by the digital image signal received from the A / D conversion unit 104. The smear information is information relating to the width of the smear area and the amount of movement. The smear detection unit 106 notifies the control unit 102 of smear information.

  Further, when the control unit 102 (correction control unit 124) receives the smear information, any of a plurality of smear correction processes (smear correction processing by the program shift unit 122, smear correction processing by the subtraction processing unit 123) according to the smear information. Select or to make corrections.

  For example, the correction control unit 124 selects one of a plurality of smear correction processes according to the width of the smear region and causes the smear correction unit to perform correction. If the width of the smear region is less than the first threshold (TH_SumiaAmount shown in FIG. 2), the correction control unit 124 selects the smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction (FIG. 3). reference).

  Alternatively, for example, the correction control unit 124 selects one of a plurality of smear correction processes according to the amount of movement of the smear region, and causes the smear correction unit to perform correction. When the amount of movement of the smear region is less than the second threshold (TH_SumiaMove shown in FIG. 2), the correction control unit 124 selects the smear correction process using the subtraction processing unit 123 and causes the smear correction unit to perform correction (FIG. 4).

  The image processing unit 105 performs various types of image processing on the digital image signal (image data) output from the A / D conversion unit 104, and outputs a processed digital image signal (image data). Further, the image processing unit 105 outputs the processed image data to the EVF display unit 107. The EVF display unit 107 displays an image according to the processed image data.

  In accordance with the image acquired by the image processing unit 105, the AF processing unit 108 drives and controls the lens 108a to focus on the subject, for example, by a contrast detection method. Thereby, the AF processing unit 108 performs AF processing.

  Further, according to the image acquired by the image processing unit 105, the AE processing unit 109 controls the driving of the diaphragm 109a so that the screen is exposed to an optimum exposure. Thereby, the AE processing unit 109 performs AE processing.

  The control unit 102 repeats the above process as long as the SW1 signal is not notified from the shutter switch (that is, the shutter switch is half-pressed). When the control unit 102 receives a notification of the signal SW1 signal from the shutter switch, AF and AE processes are performed using the image at this time, and the optimum focus and exposure setting conditions for photographing are acquired.

  Then, the control unit 102 returns the process before the notification of the SW1 signal and repeats the above process unless receiving the notification of the SW2 signal from the shutter switch (that is, the notification of the full press of the shutter switch). When the control unit 102 receives notification of the SW2 signal from the shutter switch, it determines whether or not to emit the flash. Whether or not to emit the flash may be determined in advance by using the operation unit 101 and may be determined by reading the setting data, or may be automatically determined by detecting the darkness of the surroundings. You may do it.

  As a result of this determination, when performing flash emission, the control unit 102 controls the EF processing unit 110 to cause the flash unit 111 to perform pre-emission, and performs processing such as calculation of the emission amount and weighting of the EF frame. Then, the control unit 102 causes the flash unit 111 to emit light with the main light emission amount calculated by the pre-light emission. Then, the control unit 102 captures an image via the imaging unit 103. In the case of non-flash emission, the process proceeds to the following process without the above dimming control.

  In the actual photographing, light from the outside world enters the image pickup means 103 through the lens 108a and the diaphragm 109a, so that each pixel in the image pickup area of the image pickup means 103 has a charge corresponding to the amount of the incident light. Accumulated. That is, the imaging unit 103 captures an object and acquires an image signal. The imaging unit 103 outputs the acquired image signal to the A / D conversion unit 104.

  The A / D conversion unit 104 performs sampling, gain adjustment, A / D conversion, and the like on the analog image signal output from the imaging unit 103 to generate and output a digital image signal.

  The image processing unit 105 performs various types of image processing on the digital image signal output from the A / D conversion unit 104, and outputs a processed digital image signal.

  The format conversion unit 112 converts the format of the digital image signal (image data) output from the image processing unit 105 into a format such as JPEG and outputs the format to the image recording unit 113. The image recording unit 113 performs processing for recording the format-converted image data in a predetermined memory.

  By the process described above, the optimum correction process can be selectively performed on the smear area where the smear has occurred, so that the smear area can be appropriately corrected. This makes it possible to perform appropriate shooting for both live images and still images.

  Next, a flow of processing in which the imaging apparatus 100 corrects the smear area will be described with reference to FIG. FIG. 2 is a flowchart illustrating a flow of processing in which the imaging apparatus 100 corrects the smear region.

  In step S201, the control unit 102 accesses the AE processing unit 109 to acquire the current exposure setting values (Av, Tv, Gain).

  In step S202, the smear detection means 106 detects a smear region from the image of the subject. For example, the smear detection unit 106 detects a smear area based on image data of pixels in the imaging area and image data of pixels in the non-readout area. Alternatively, for example, the smear detection unit 106 detects the smear area based on the image data of the pixels in the imaging area and the image data of the pixels in the light shielding area.

  In step S203, the smear detection means 106 detects smear information from the image of the subject. The smear information is information relating to the width of the smear area and the amount of movement.

  For example, the smear detection unit 106 counts the number of pixels arranged in the direction perpendicular to the longitudinal direction of the detected smear area, detects the width of the smear area, and includes information on the width of the smear area in the smear information.

  For example, the smear detection unit 106 accesses the image recording unit 113 and acquires information on a smear region generated in the image of the immediately preceding frame. The smear detection means 106 compares the detected smear area with the smear area of the immediately preceding frame, detects the amount of movement of the smear area, and includes information on the amount of movement of the smear area in the smear information.

  In step S204, the correction control means 124 of the control unit 102 determines whether or not the smear region width is less than the first threshold (TH_SumiaAmount) and the aperture value (Av) is less than the maximum (AvMax). If the correction control unit 124 determines that the width of the smear region is less than the first threshold and the aperture value is less than the maximum, the process proceeds to step S205. Here, the maximum aperture value indicates a state in which the aperture 109a is most contracted. If the correction control unit 124 determines that the width of the smear region is not less than the first threshold value or the aperture value is not less than the maximum, the process proceeds to step S206.

  In step S205, the correction control unit 124 selects smear correction processing using the program shift unit 122 and causes the smear correction unit to perform correction. The program shift means 122 drives the aperture 109a to reduce the aperture 109a. As a result, the correction control unit 124 corrects the smear region in the image shown in the left diagram of FIG. 3 to obtain the image shown in the right diagram of FIG. 3.

  In step S206, the correction control means 124 of the control unit 102 determines whether or not the amount of movement of the smear region is less than the second threshold value (TH_SumiaMove). If the correction control unit 124 determines that the movement amount of the smear region is less than the second threshold value, the correction control unit 124 proceeds to step S207. If the correction control unit 124 determines that the movement amount of the smear region is not less than the second threshold value, the process proceeds to step S210. Proceed to

  In step S207, the correction control unit 124 selects a smear correction process using the subtraction processing unit 123 and causes the smear correction unit to perform correction (see FIG. 4). The subtraction processing unit 123 subtracts the smear signal component from the image data corresponding to the image signal acquired by the imaging unit 103. This image data is, for example, data corresponding to an image signal acquired from a pixel in the imaging area of the imaging unit 103. The smear signal component is, for example, data corresponding to an image signal acquired from a pixel in a non-readout area of the imaging unit 103. Or a smear signal component is the data according to the image signal acquired from the pixel of the light-shielding area | region of the imaging means 103, for example. Thereby, the correction control means 124 corrects the smear region in the image shown in the left diagram of FIG. 4 to obtain the image shown in the right diagram of FIG.

  In step S210, the correction control unit 124 selects a smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction. The program shift means 122 drives the aperture 109a to reduce the aperture 109a. Thereby, the correction control means 124 corrects the smear region in the image shown in the left diagram of FIG. 5 to obtain the image shown in the right diagram of FIG.

  As described above, when the width of the smear region is less than the first threshold, the correction control unit 124 selects the smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction. When the width of the smear region is equal to or greater than the first threshold value, the correction control unit 124 prompts the user to select another smear correction process. As a result, it is possible to prevent a thin gray streak from being left without smear being reduced in the subject image.

  Further, when the movement amount of the smear region is less than the second threshold, the correction control unit 124 selects a smear correction process using the subtraction processing unit 123 and causes the smear correction unit to perform correction. When the amount of movement of the smear region is equal to or greater than the second threshold, the correction control unit 124 selects a smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction. Thereby, it is possible to reduce the occurrence of black streak due to excessive subtraction at the end of the smear region.

  In this way, the smear region can be appropriately corrected.

  The smear information may be information related to at least one of the width, movement amount, and position of the smear area. In this case, the processing flow in which the imaging apparatus 100 corrects the smear area may be a processing flow different from that in FIG. 2 corresponding to the smear information.

  Next, an imaging apparatus 500 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a configuration diagram of an imaging apparatus 500 according to the second embodiment of the present invention. Below, it demonstrates centering on a different part from 1st Embodiment, and abbreviate | omits description about the same part.

  The basic configuration of the imaging apparatus 500 is the same as that of the first embodiment, but differs from the first embodiment in that it includes a face detection unit 515, a smear detection unit 506, and a control unit 502. That is, it differs from the first embodiment in the following points.

  The face detection unit 515 detects a face area and face information from the digital image signal received from the A / D conversion unit 104, that is, from the image of the subject. The face area is an area recognized as the face of the subject. The face information is information related to the position of the face area.

  The smear detection means 506 detects a smear area and smear information from the image of the subject. The smear information is information relating to the width, movement amount, and position of the smear area.

  The control unit 502 includes a calculation unit 525. The calculation unit 525 receives face information from the face detection unit 515 and receives smear information from the smear detection unit 506. The calculating means 525 calculates the relative positions of the smear area and the face area based on the smear information and the face information. That is, the calculating means 525 calculates the degree of coincidence based on the smear information and the face information. The degree of coincidence indicates the degree of overlap between the smear area and the face area.

  The correction control means 524 of the control unit 502 selects one of a plurality of smear correction processes according to the information obtained according to the smear information, that is, the relative position of the smear area to the face area, and performs smear correction. Let the means do the correction. That is, when the degree of coincidence is equal to or greater than the third threshold (TH shown in FIG. 7), the correction control unit 524 selects the smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction (FIG. 8). reference).

  Further, as shown in FIG. 7, the flow of processing in which the imaging apparatus 500 corrects the smear region is different from that of the first embodiment in the following points. FIG. 7 is a flowchart showing a flow of processing in which the imaging apparatus 500 corrects the smear region.

  In step S603, the smear detection unit 506 detects smear information from the image of the subject. The smear information is information relating to the width, movement amount, and position of the smear area.

  For example, the smear detection unit 506 detects the position of the smear region by detecting the position of the pixel belonging to the detected smear region in the imaging region, and includes information on the position of the smear region in the smear information. The other processes are the same as step S203 shown in FIG.

  In step S608, the face detection unit 515 detects a face area from the subject image. The face area is an area recognized as the face of the subject.

  Note that a known face detection technique is used for the face detection in the present invention. As a known face detection technique, a method using learning typified by a neural network, a part having a characteristic shape such as an eye, nose, or mouth is searched from an image area using template matching, and is regarded as a face if the similarity is high. Techniques are listed. In addition, many other methods have been proposed, such as methods that detect image features such as skin color and eye shape and use statistical analysis. In general, multiple methods are used to recognize faces. Is common.

  Specific examples include a face detection method using wavelet transform and image feature amount described in JP-A-2002-251380.

  In step S609, the face detection unit 515 detects face information from the image of the subject. The face information is information related to the position of the face area.

  For example, the face detection unit 515 detects the position of the face area by detecting the position of the pixel belonging to the detected face area in the imaging area, and includes information on the position of the face area in the face information.

  In step S611, the calculation unit 525 of the control unit 502 receives face information from the face detection unit 515 and receives smear information from the smear detection unit 506. The calculating means 525 calculates the relative positions of the smear area and the face area based on the smear information and the face information. That is, the calculating means 525 calculates the degree of coincidence based on the smear information and the face information. The degree of coincidence is an index indicating the degree of overlap between the smear area and the face area, and is calculated by, for example, the following Equation 1.

α = (Area area where smear area and face area overlap)
÷ (Area of the face area) ... Equation 1
In step S612, the correction control means 524 determines whether or not the degree of coincidence is greater than or equal to the third threshold value (TH). Correction control means 524, if the match degree is judged to be the third threshold value or more, the process proceeds to step S 6 10, if it is determined that the degree of coincidence is not the third threshold value or more, the process proceeds to step S207.

  In step S610, the correction control unit 524 selects a smear correction process using the program shift unit 122 and causes the smear correction unit to perform correction. The program shift means 122 drives the aperture 109a to reduce the aperture 109a. Thereby, the correction control means 524 corrects the smear region in the image shown in the left diagram of FIG. 8 to obtain the image shown in the right diagram of FIG.

  As described above, the correction control unit 524 selects the smear correction process using the program shift unit 122 when the degree of coincidence indicating the degree of overlap between the smear region and the face region is equal to or greater than the third threshold value, and sets the smear correction unit to the smear correction unit. Make corrections. When the degree of coincidence is less than the third threshold, the correction control unit 524 selects a smear correction process using the subtraction processing unit 123 and causes the smear correction unit to perform correction. Thereby, when the smear region is applied to the face of the subject, it is possible to reduce the occurrence of black stripes on the face in the image of the subject.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes modifications and the like without departing from the gist of the present invention. For example, when correcting the smear area, the correction control means does not select the smear correction process using either the program shift means 122 or the subtraction processing means 123, but makes the weights different from each other while using them together. It doesn't matter. For example, in step S207 in FIG. 2 and FIG. 7, not only the smear signal component subtraction process by the subtraction processing means 123 but also the program shift means 122 may reduce the aperture 109a in parallel. The smear area is roughly corrected by the subtraction processing means 123, and the rest is corrected by the program shift means 122, so that the risk of oversubtraction is suppressed, but the smear area is corrected only by the program shift means 122. Results may be obtained.

1 is a configuration diagram of an imaging apparatus according to a first embodiment of the present invention. 6 is a flowchart showing a flow of processing in which the imaging apparatus corrects a smear region. The figure which shows the smear area | region in the image | photograph of a to-be-photographed object. The figure which shows the smear area | region in the image | photograph of a to-be-photographed object. The figure which shows the smear area | region in the image | photograph of a to-be-photographed object. The block diagram of the imaging device which concerns on 2nd Embodiment of this invention. 6 is a flowchart showing a flow of processing in which the imaging apparatus corrects a smear region. The figure which shows the smear area | region in the image | photograph of a to-be-photographed object. The figure explaining the subject of this invention. The figure explaining the subject of this invention.

Explanation of symbols

101 Operation Unit 102 Control Unit 103 Imaging Unit 104 A / D Conversion Unit 105 Image Processing Unit 106 Smear Detection Unit 107 EVF Display Unit 108 AF Processing Unit 108a Lens 109 AE Processing Unit 109a Mechanical Mechanism 110 EF Processing Unit 111 Flash Unit 112 Format Conversion Unit 113 image recording unit 114 external connection unit 201 operation unit 202 control unit 203 imaging unit 204 A / D conversion unit 205 image processing unit 206 smear detection unit 207 EVF display unit 208 AF processing unit 208a lens 209 AE processing unit 209a mechanical mechanism 210 EF processing unit 211 flash unit 212 format conversion unit 213 image recording unit 214 external connection unit 215 subject detection unit

Claims (8)

Smear detection means for detecting a smear area where smear has occurred from image data of the subject acquired by the imaging means, and detecting a width of the smear area;
Smear signal component acquisition means for acquiring a smear signal component of the smear from data output from a pixel in a non-readout area or a light shielding area of the imaging means;
Diaphragm means for driving the diaphragm to adjust the amount of light incident on the imaging means;
Subtraction processing means for subtracting the smear signal component from the image data obtained by the imaging means;
When a predetermined condition including that the width of the smear region is less than a predetermined width is satisfied, smear is reduced by causing the aperture means to reduce the aperture, and the width of the smear region is determined in advance. When a predetermined condition including being equal to or greater than a predetermined width is satisfied, correction is performed to reduce smear by causing the subtraction processing unit to subtract the smear signal component from the image data acquired by the imaging unit. Correction control means for controlling
An imaging apparatus comprising:   Smear detection means for detecting a smear area where smear has occurred and detecting a movement amount of the smear area from image data of the subject acquired by the imaging means;
  Smear signal component acquisition means for acquiring a smear signal component of the smear from data output from a pixel in a non-readout area or a light shielding area of the imaging means;
  Diaphragm means for driving the diaphragm to adjust the amount of light incident on the imaging means;
  Subtraction processing means for subtracting the smear signal component from the image data obtained by the imaging means;
  When a predetermined condition including that the amount of movement of the smear region is less than a predetermined amount of movement is satisfied, the smear signal component is subtracted from the image data acquired by the imaging unit to the subtraction processing unit. The smear is reduced by reducing the smear area, and when the predetermined amount condition that the movement amount of the smear region is equal to or greater than the predetermined movement amount is satisfied, the throttling means reduces the smear. Correction control means for controlling to perform correction
An imaging apparatus comprising:   Smear detection means for detecting a smear area where smear has occurred from the image data of the subject acquired by the imaging means;
  Smear signal component acquisition means for acquiring a smear signal component of the smear from data output from a pixel in a non-readout area or a light shielding area of the imaging means;
  Diaphragm means for driving the diaphragm to adjust the amount of light incident on the imaging means;
  Subtraction processing means for subtracting the smear signal component from the image data obtained by the imaging means;
  Face detection means for detecting a face area recognized as the face of the subject from the image data of the subject;
  An arithmetic means for calculating a degree of coincidence indicating the degree of overlap between the smear area and the face area from the position of the smear area and the position of the face area;
  When a predetermined condition including that the degree of coincidence is equal to or higher than a predetermined degree of coincidence is satisfied, smear is reduced by narrowing the diaphragm to the diaphragm, and the degree of coincidence is predetermined. In a case where a predetermined condition including that of less than the predetermined condition is satisfied, correction is performed to reduce smear by subtracting the smear signal component from the image data acquired by the imaging unit to the subtraction processing unit. Correction control means to control and
An imaging apparatus comprising:   The smear detection means further detects the amount of movement of the smear region,
  The correction control means causes the diaphragm means to narrow the diaphragm when the width of the smear area is less than a predetermined width or the movement amount of the smear area is greater than or equal to a predetermined movement amount. The imaging apparatus according to claim 1, wherein control is performed so as to perform correction to reduce smear.   The smear detection means further detects a width and a movement amount of the smear region,
  When the width of the smear region is equal to or greater than the predetermined width and the amount of movement of the smear region is less than a predetermined amount of movement or the degree of coincidence is less than a predetermined degree of coincidence, The imaging apparatus according to claim 3, wherein the subtraction processing unit is controlled to perform correction to reduce smear by subtracting the smear signal component from the image data acquired by the imaging unit. .   An imaging apparatus control method comprising: imaging means; and diaphragm means for driving a diaphragm to adjust the amount of light incident on the imaging means,
  A smear detecting step for detecting a smear area where smear has occurred and detecting a width of the smear area from the image data of the subject acquired by the imaging means;
  A smear signal component acquisition unit acquires a smear signal component of the smear from data output from a pixel in a non-readout region or a light shielding region of the imaging unit;
  A first correction for reducing smear by causing the diaphragm means to squeeze the diaphragm when the correction control means satisfies a predetermined condition including that the width of the smear region is less than a predetermined width. Process,
  The correction control means subtracts the smear signal component from the image data acquired by the imaging means when a predetermined condition including that the width of the smear region is equal to or larger than a predetermined width is satisfied. A second correction step for reducing smear by
An image pickup apparatus control method comprising:   An imaging apparatus control method comprising: imaging means; and diaphragm means for driving a diaphragm to adjust the amount of light incident on the imaging means,
  A smear detection step for detecting a smear region where smear has occurred and detecting a movement amount of the smear region from the image data of the subject acquired by the imaging unit;
  A smear signal component acquisition unit acquires a smear signal component of the smear from data output from a pixel in a non-readout region or a light shielding region of the imaging unit;
  The correction control means subtracts the smear signal component from the image data acquired by the imaging means when a predetermined condition including that the movement amount of the smear region is less than a predetermined movement amount is satisfied. A first correction step for reducing smear by causing
  The correction control means reduces the smear by reducing the diaphragm to a diaphragm when a predetermined condition including that the movement amount of the smear region is equal to or greater than a predetermined movement amount is satisfied. Correction process and
An image pickup apparatus control method comprising:   An imaging apparatus control method comprising: imaging means; and diaphragm means for driving a diaphragm to adjust the amount of light incident on the imaging means,
  A smear detection step in which the smear detection means detects a smear area where the smear has occurred from the image data of the subject acquired by the imaging means;
  A smear signal component acquisition unit acquires a smear signal component of the smear from data output from a pixel in a non-readout region or a light shielding region of the imaging unit;
  A face detecting step of detecting a face area recognized as the face of the subject from the image data of the subject;
  A calculating step of calculating a degree of coincidence indicating the degree of overlap between the smear area and the face area from the position of the smear area and the position of the face area;
  A first correction step in which the correction control means reduces smear by causing the diaphragm means to squeeze the diaphragm when a predetermined condition including that the degree of coincidence is equal to or greater than a predetermined degree of coincidence is satisfied. When,
  The correction control means subtracts the smear signal component from the image data acquired by the imaging means when a predetermined condition including that the degree of coincidence is less than a predetermined degree of coincidence is satisfied. A second correction step for reducing smear by
An image pickup apparatus control method comprising:

Images