JP2010239267A - Imaging apparatus, method for controlling peripheral darkening correction, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain a peripheral darkening correction naturally in accordance with presence/absence of a moving object. <P>SOLUTION: The moving object is detected from a through-image by a motion detector 203 in S1. The detection of the moving object is performed by detecting a motion vector. When the moving object is detected, processing is progressed to S2 for implementing shading correction due to gain increase. If no moving object is detected, processing is progressed to S4 for correcting peripheral darkening using a plurality of images. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an imaging apparatus capable of correcting peripheral light reduction by image processing.

An imaging apparatus disclosed in Patent Literature 1 corrects a positional deviation of a plurality of captured images including the same subject and generates a composite image, and optical system peripheral dimming with respect to the composite image generated by the composite unit Peripheral light reduction correction means for performing peripheral light attenuation correction in consideration of characteristics.
JP 2008-92548 A

  When the moving object as shown in FIG. 10 is within the angle of view, the peripheral light reduction correction for combining a plurality of images as in the cited document 1 causes the moving objects at different times to overlap each other, so that a natural image can be obtained. Have difficulty. The present invention enables natural peripheral dimming correction depending on the presence or absence of moving objects.

  An image pickup apparatus according to the present invention includes an image pickup unit that photoelectrically converts an object image formed through an image pickup optical system and outputs an image, and a target image based on a desired reference image output from the image pickup unit. A moving body detection unit that detects motion, a first correction unit that performs peripheral light attenuation correction by increasing the gain of an image signal of the image, and a desired correction target image output from the imaging unit, and output from the imaging unit A second correction unit that performs peripheral attenuation correction by adding another image obtained from the imaging unit to a desired correction target image, and detection of movement of the subject from the reference image by the moving object detection unit A control unit that performs control to switch the peripheral light reduction correction method of the correction target image to the correction of the first correction unit or the correction of the second correction unit according to the presence or absence.

  According to the present invention, natural peripheral dimming correction can be performed by properly using the peripheral dimming correction method depending on the presence or absence of a moving object within the shooting angle of view.

  The moving object detection unit detects the movement of the subject within a predetermined correction range set in the reference image.

  This speeds up the process.

  The moving body detection unit detects the movement of the subject for each predetermined section set in the reference image, and the control unit detects whether the movement of the subject in each section of the reference image is detected by the moving body detection unit, For each section of the correction target image corresponding to the section, control is performed to switch the peripheral light reduction correction method of the correction target image to the correction of the first correction unit or the correction of the second correction unit.

  By subdividing the range in which the peripheral dimming correction is switched, more natural image correction can be performed.

  The moving body detection unit detects a motion vector of the subject based on the plurality of reference images output from the imaging unit, and detects the motion of the subject based on whether or not the motion vector is detected.

 The moving body detection unit detects the face area of the subject based on the reference image, and presumes that the movement of the subject is detected according to whether or not the face area is detected.

  Prediction of moving objects by face detection increases the accuracy of correction compared to motion vector detection.

  In the peripheral dimming correction control method according to the present invention, an imaging device converts a subject image formed through an imaging optical system into a desired reference image output from an imaging unit that photoelectrically converts an object image and outputs an image. A step of detecting the movement of the subject based on the image, a step of performing peripheral light attenuation correction by increasing the gain of the image signal of the image with respect to a desired correction target image output from the imaging unit, and a desired output output from the imaging unit. Correction is performed according to the step of performing peripheral dimming correction by adding another image obtained from the imaging unit to the correction target image and whether or not the motion of the subject is detected from the reference image by the moving object detection unit. And a step of performing control to switch the peripheral light reduction correction method of the target image to the correction of the first correction unit or the correction of the second correction unit.

  A peripheral dimming correction control program for causing the imaging apparatus to execute the peripheral dimming correction control method is also included in the present invention.

  According to the present invention, natural peripheral dimming correction can be performed by properly using the peripheral dimming correction method depending on the presence or absence of a moving object within the shooting angle of view.

  FIG. 1 is a block diagram illustrating a main configuration of the imaging apparatus 10. The imaging device 10 is a digital camera having a function of recording and reproducing still images and moving images, and the overall operation of the imaging device 10 is controlled by a central processing unit (CPU) 50. The CPU 50 functions as control means for controlling the camera system according to a predetermined program, and performs various calculations such as automatic exposure (AE) calculation, automatic focus adjustment (AF) calculation, and white balance (WB) adjustment calculation. Functions as a means. The power supply circuit 150 supplies power to each block of the camera system.

  A ROM (Read Only Memory) 56 and a flash memory 58 are connected to the CPU 50 via a bus 54. The ROM 56 stores programs executed by the CPU 50 and various data necessary for control, and the flash memory 58 is a built-in memory built in the imaging apparatus 10 and includes CCD pixel defect information and various constants / information relating to camera operation. Etc. are stored.

  A memory (SDRAM, Synchronous Dynamic Random Access Memory) 60 is used as a program development area and a calculation work area for the CPU 50, and also as a temporary recording area for image data and audio data. A video random access memory (VRAM) 62 is a temporary recording memory dedicated to image data, and includes an A area 62A and a B area 62B. Note that the memory 60 and the VRAM 62 can be shared.

  The flash memory 58 is a non-volatile memory, and the memory 60 is a volatile memory.

  The operation switch group 64 is a block including the shutter button 20 and a power switch. Signals from these various operation switches are input to the CPU 50, and the CPU 50 controls each circuit of the imaging apparatus 10 based on the input signals. For example, lens drive control, imaging operation control, image processing control, and image data recording / recording Playback control, display control of the image display device 28, and the like are performed.

  The imaging device 10 includes a media socket (media mounting unit), and a recording medium 68 that is a removable memory that is detachable from the imaging device 10 can be mounted in the media socket. As the form of the recording medium 68, various media such as a semiconductor memory card represented by xD-PictureCard (trademark) and smart media (trademark), a portable small hard disk, a magnetic disk, an optical disk, a magneto-optical disk, and the like may be used. it can. The media controller 70 performs necessary signal conversion in order to exchange input / output signals suitable for the recording medium 68 attached to the media socket.

  In addition, the imaging apparatus 10 includes an external connection interface (I / F) unit 72 as a communication unit for connecting to a personal computer or other external devices. The imaging device 10 can exchange data with the external device by connecting the imaging device 10 and the external device using a USB cable (not shown) or the like. The communication method with the external device is not limited to USB, and IEEE1394, Bluetooth, and other communication methods may be applied.

  Next, the imaging function of the imaging device 10 will be described. When the imaging mode is selected by the mode switch of the operation switch group 64, power is supplied to the imaging unit including the solid-state imaging device 74 (which will be described as CCD in the following description, but may be CMOS or the like), and imaging is possible. It becomes a state.

  The lens unit is an optical unit that includes a photographing lens 14 including a focus lens and a zoom lens, and a mechanical shutter 82 that also serves as an aperture. Focusing of the photographing lens 14 is performed by moving the focus lens by a focus motor (not shown), and zooming is performed by moving the zoom lens by a zoom motor (not shown). The focus motor and the zoom motor are driven and controlled by a lens motor driver 78, respectively. The CPU 50 controls the lens motor driver 78 by outputting a control signal.

  The diaphragm 82 is a so-called turret-type diaphragm, and changes the diaphragm value (F value) by rotating a turret plate in which diaphragm holes F2.8 to F8 are formed. The diaphragm 82 is driven by an iris motor (not shown). The iris motor is driven and controlled by an iris motor driver 80. The CPU 50 controls the iris motor driver 80 by outputting a control signal.

  The light that has passed through the lens unit forms an image on the light receiving surface of the CCD 74. A large number of photodiodes (light receiving elements) are two-dimensionally arranged on the light receiving surface of the CCD 74, and red (R), green (G), and blue (B) primary color filters corresponding to each photodiode. They are arranged in a predetermined arrangement structure (Bayer, G stripe, etc.). The CCD 74 has an electronic shutter function for controlling the charge accumulation time (shutter speed) of each photodiode. The CPU 50 controls the charge accumulation time in the CCD 74 via the timing generator (TG) 84.

  The subject image formed on the light receiving surface of the CCD 74 is converted into a signal charge corresponding to the amount of incident light by each photodiode. The signal charge accumulated in each photodiode is sequentially read out as a voltage signal (image signal) corresponding to the signal charge based on a drive pulse given from the TG 84 in accordance with a command from the CPU 50.

  The signal output from the CCD 74 is sent to an analog processing unit (CDS / AMP) 86, where the R, G, and B signals for each pixel are sampled and held (correlated double sampling processing), amplified, and then A / Applied to the D converter 88. The dot sequential R, G, B signals converted into digital signals by the A / D converter 88 are recorded in the memory 60 via the image input controller 90.

  The image signal processing circuit 92 processes the R, G, and B signals recorded in the memory 60 in accordance with instructions from the CPU 50. That is, the image signal processing circuit 92 includes a synchronization circuit (a processing circuit that converts a color signal into a simultaneous expression by interpolating a spatial shift of the color signal associated with the color filter array of the single CCD), a white balance correction circuit, It functions as an image processing means including a gamma correction circuit, a contour correction circuit, a luminance / color difference signal generation circuit, etc., and performs predetermined signal processing using the memory 60 in accordance with commands from the CPU 50.

  The RGB image data input to the image signal processing circuit 92 is converted into a luminance signal (Y signal) and a color difference signal (Cr, Cb signal) by the image signal processing circuit 92, and predetermined processing such as gamma correction is performed. Applied. The image data processed by the image signal processing circuit 92 is stored in the memory 60.

  When the captured image is output to the image display device 28 on a monitor, the image data is read from the VRAM 62 and sent to the video encoder 94 via the bus 54. The video encoder 94 converts the input image data into a predetermined signal for display (for example, an NTSC color composite image signal) and outputs the signal to the image display device 28.

  With the image signal output from the CCD 74, image data representing an image for one frame is rewritten alternately in the A area 62A and the B area 62B of the VRAM 62. Of the A area 62A and B area 62B of the VRAM 62, the written image data is read from an area other than the area where the image data is rewritten. In this way, the image data in the VRAM 62 is periodically rewritten, and an image signal generated from the image data is supplied to the image display device 28, whereby the image being captured is displayed on the image display device 28 in real time. Is done. The photographer can confirm the angle of view of the image by the video (through image) displayed on the image display device 28.

  When the shutter button 20 is half-pressed, the imaging device 10 starts AE and AF processing. That is, the image signal output from the CCD 74 is input to the AF detection circuit 96 and the AE / AWB detection circuit 98 via the image input controller 90 after A / D conversion.

  The AE / AWB detection circuit 98 includes a circuit that divides one screen into a plurality of areas (for example, 8 × 8 or 16 × 16) and integrates RGB signals for each divided area, and provides the integrated value to the CPU 50. . The CPU 50 detects the brightness of the subject (subject luminance) based on the integrated value obtained from the AE / AWB detection circuit 98, and calculates an exposure value (imaging EV value) suitable for imaging. According to the obtained exposure value and a predetermined program diagram, the aperture value and the shutter speed are determined, and the CPU 50 controls the electronic shutter and iris of the CCD 74 to obtain an appropriate exposure amount.

  The AE / AWB detection circuit 98 calculates an average integrated value for each color of the RGB signals for each divided area during automatic white balance adjustment, and provides the calculation result to the CPU 50. The CPU 50 obtains an integrated value of R, an integrated value of B, and an integrated value of G, obtains a ratio of R / G and B / G for each divided area, and calculates R / G and R / G of the values of B / G. The light source type is determined based on the distribution in the color space of the G, B / G axis coordinates, and the gain value (white balance correction value) for the R, G, B signals of the white balance adjustment circuit according to the determined light source type. To correct the signal of each color channel. Details of the white balance adjustment will be described later.

  For example, contrast AF that moves the focus lens so that the high-frequency component of the G signal of the image signal is maximized is applied to the AF control in the imaging apparatus 10. That is, the AF detection circuit 96 cuts out a signal in a focus target area set in advance in a high-pass filter that passes only a high-frequency component of the G signal, an absolute value processing unit, and a screen (for example, the center of the screen). An area extraction unit and an integration unit that integrates absolute value data in the AF area are configured.

  The integrated value data obtained by the AF detection circuit 96 is notified to the CPU 50. The CPU 50 calculates a focus evaluation value (AF evaluation value) at a plurality of AF detection points while controlling the lens motor driver 78 to move the focus lens, and determines a lens position where the evaluation value is a maximum as a focus position. To do. Then, the CPU 50 controls the lens motor driver 78 so as to move the focus lens to the obtained in-focus position. The calculation of the AF evaluation value is not limited to a mode using the G signal, and a luminance signal (Y signal) may be used.

  The shutter button 20 is half-pressed, AE / AF processing is performed, the shutter button 20 is fully pressed, and a recording imaging operation starts. The image data acquired in response to the full press of the shutter button 20 is converted into a luminance / color difference signal (Y / C signal) in the image signal processing circuit 92 and subjected to predetermined processing such as gamma correction, and then the memory. 60.

  The Y / C signal stored in the memory 60 is compressed according to a predetermined format by the compression / decompression circuit 100 and then recorded on the recording medium 68 via the media controller 70. For example, a still image is recorded in JPEG (Joint Photographic Experts Group) format.

  When the playback mode is selected by the mode switch, the compressed data of the last image file (last recorded file) recorded on the recording medium 68 is read. When the file related to the last recording is a still image file, the read image compression data is decompressed to an uncompressed YC signal via the compression / decompression circuit 100, and via the image signal processing circuit 92 and the video encoder 94. After being converted into a display signal, it is output to the image display device 28. Thereby, the image content of the file is displayed on the screen of the image display device 28.

  During single-frame playback of a still image (including playback of the first frame of a moving image), the file to be played back can be selected by operating the strobe button (right key) or macro button (left key) included in the operation switch group 64. Switching (forward frame / reverse frame) is possible. The image file at the frame-advanced position is read from the recording medium 68, and still images and moving images are reproduced and displayed on the image display device 28 in the same manner as described above.

  When an external display such as a personal computer or a television is connected to the imaging device 10 via the video input / output terminal in the playback mode, the image data recorded on the recording medium 68 is output by the video output circuit 104. It is processed and displayed on this external display.

  Further, an audio input / output circuit 106 is connected to the CPU 50. A speaker 108 and a microphone 110 are connected to the audio input / output circuit 106, and various operation sounds in an imaging mode and a playback mode are reproduced and output, and an audio signal at the time of moving image imaging is input.

  By starting the power supply to the flash control unit 51 under the control of the CPU 50, the light emission capacitor of the flash light 52 is charged, and a light emission signal is sent from the CPU 50 to the flash control unit 51 at a predetermined timing, and a xenon tube, an LED, etc. The flashlight 52 constituted by emits light. The CPU 50 emits light from the flashlight 52 at the time of shooting when “forced light emission” is designated from the operation switch group 64 or when the subject brightness detected by the AE process is less than a predetermined value, for example, the subject brightness falls below 9.1 Ev. I do.

  A real time clock (RTC) 53 outputs current time information to the CPU 50.

  A first correction unit 201, a second correction unit 202, a motion detection unit 203, and a face detection unit 204 are connected to the bus 54. These functions will be described later.

  FIG. 2 shows a flowchart of a photographing process executed by the imaging apparatus 10. This process is executed by the CPU 50. A program for causing the CPU 50 to execute this processing is stored in the ROM 56. This process starts in response to the selection of the shooting mode from the operation switch group 64.

  In S1, the motion detection unit 203 detects a moving object from the through image. The moving object is detected by detecting a motion vector. If a moving object is detected, the process proceeds to S2. If not detected, the process proceeds to S4. Various known techniques can be adopted as a method of detecting the motion vector. For example, first, after extracting a region including a moving object (tracking target region) from a through image at a certain time and storing it as a template, a correlation value is obtained while slightly shifting the position of the template on the through image obtained subsequently. A method (pattern matching method) for detecting a motion vector by calculating and obtaining a region having the largest correlation can be employed.

  In S2, a recording image for one sheet is taken.

  In S3, a known shading correction is performed by increasing the gain of the image signal of the image obtained in the shooting of S2 by the first correction unit 201 (for example, Japanese Patent Laid-Open No. 8-79773 or Japanese Patent Laid-Open No. 8-79773). 2007-300360). This shading correction is performed by multiplying the recording image by a correction gain coefficient that takes into account the effect of dimming due to the influence of ambient light caused by the optical system's lens frame, etc., and increasing the gain of the luminance signal or chroma signal to cause uneven luminance. Correct color unevenness. The corrected image is recorded on the recording medium 68.

  In S4, multiframe shooting (continuous shooting) is performed. Multiframe shooting is to obtain a plurality of still images by repeating shooting a predetermined number of times.

  In S5, the second correction unit 202 performs the peripheral light reduction correction using the plurality of images obtained in S4. This is performed as described in a known technique, for example, Patent Document 1. FIG. 3 shows a corrected image I3 obtained by correcting the image I1 using the image I1 in which peripheral light reduction occurs, the image I2 obtained by multi-frame shooting, and the image I2. Image I1 is a correction target image that has been dimmed, and image I2 has the same exposure as image I1, but is a correction image that was shot at a different shutter speed. By adding the correction use region R2 in the image I2 to the corresponding region R1 in the image I1, the peripheral light attenuation of the image I1 is corrected, and a corrected image I3 is obtained. The corrected image I3 is recorded on the recording medium 68.

  With the above processing, if there is a moving object in the through image, the peripheral light is corrected by correcting the single image. If there is no moving object, a plurality of images are synthesized and peripheral light attenuation correction is performed. In this way, it is possible to switch the peripheral dimming correction method depending on the presence or absence of a moving object, and to prevent an unnatural correction on an image in which a moving object exists. It should be noted that the same peripheral dimming correction can be performed for correcting an image that is not recorded, such as a through image. A moving object may be detected from the correction use region R2 itself of the image I2 instead of the through image, and may branch to S2 or S4 depending on the presence or absence thereof.

<Second Embodiment>
FIG. 4 shows a flowchart of the photographing process executed by the imaging apparatus 10. This process is executed by the CPU 50. A program for causing the CPU 50 to execute this processing is stored in the ROM 56. This process starts in response to the selection of the shooting mode from the operation switch group 64.

  In S11, a moving object is detected from a predetermined peripheral region R1 that is to be subjected to correction of peripheral light reduction in the through image. And if a moving body is detected from R1, it will progress to S12, and if not detected, it will progress to S14.

  S12 to S15 are the same as S2 to S5.

  FIG. 5 shows a corrected image I3 obtained by correcting the image I1 using the image I1 in which peripheral light reduction has occurred, the image I2 obtained by multi-frame shooting, and the image I2. By adding the correction use region R2 in the image I2 to the correction target region R1 of the corresponding image I1, the image I1 is corrected to obtain a corrected image I3. In the area on the through image corresponding to the non-correction area Rout excluding R2 in the image I2, the moving object M is not detected even if the moving object M exists, and the moving object is detected only in the corresponding area of R2 on the through image. If there is no moving object in the corresponding region of R2 on the through image, the correction usage region R2 in the image I2 is regarded as not including a moving object, and the correction usage region R2 is added to the corresponding region R1 of the image I1, thereby obtaining the image I1. Is corrected to obtain a corrected image I3. Since it is considered that the correction use region R2 does not include moving objects, it is expected that the image quality due to the addition of the correction use region R2 does not deteriorate. Of course, the moving object may be detected from the correction use region R2 itself of the image I2 instead of the through image, and the process may branch to S12 or S14 depending on the presence / absence thereof. In FIG. 5, there is no moving object M in the correction use region R2, and no moving object is detected, and the process proceeds to S14.

  As described above, when there is no moving object at an angle of view that requires peripheral light attenuation correction, peripheral light attenuation correction for combining a plurality of images is performed. Processing can be performed at high speed by not performing moving object detection at an angle of view that does not require peripheral dimming correction.

<Third Embodiment>
FIG. 6 shows a flowchart of a photographing process executed by the imaging apparatus 10. This process is executed by the CPU 50. A program for causing the CPU 50 to execute this processing is stored in the ROM 56. This process starts in response to the selection of the shooting mode from the operation switch group 64.

  In S21, the through image is divided into predetermined sections, and the presence or absence of moving objects is detected for each section. For example, as shown in FIG. 7, the through image It is equally divided into four rectangles R1-1 to R1-4, and the presence / absence of a moving object is determined for each rectangle. In order to speed up the processing, Rout of the second embodiment may be excluded from the rectangles R1-1 to R1-4. The method of determining the partitions is arbitrary, and is divided more than the figure (for example, a rectangle of 4 rows × 4 columns, or the minimum unit of the partition is a pixel), or less than the figure (for example, 1 row × Two rows of compartments) may be provided.

  In S22, multiframe shooting is performed.

  In S23, when the presence of a moving object is detected in any of the divided areas, the same correction as in S3 is performed only for the portion of the correction target image corresponding to the detected divided area of the moving object. If no moving object is detected in any of the divided areas, the same correction as in S5 is performed only for the portion of the correction target image corresponding to the divided area where the moving object is not detected. For example, as shown in FIG. 7, when the through image It is equally divided into four rectangles R1-1 to R1-4 and the presence / absence of a moving object is determined for each rectangle, the rectangle R1-1 from which the moving object is detected is determined. The shading correction of S3 is performed on the area of the correction target image (similar to the image I1 in FIG. 5) corresponding to the above, and the multi-image synthesis correction of S5 is performed on the corresponding areas of the other rectangles R1-1 to R1-4.

  S24-25 is the same as S4-5.

  Thus, since the presence or absence of a moving object is detected for each divided region and the correction process is switched according to the detection result, it is possible to prevent noise from increasing due to correction by increasing the amount of light up to a portion where correction is unnecessary. A divided area may be set in the correction use area R2 itself of the image I2 instead of the through image, a moving object may be detected from each divided area, and the process may branch to S22 or S24 for each divided area depending on the presence or absence of the detection.

<Fourth embodiment>
FIG. 8 shows a flowchart of a photographing process executed by the imaging apparatus 10. This process is executed by the CPU 50. A program for causing the CPU 50 to execute this processing is stored in the ROM 56. This process starts in response to the selection of the shooting mode from the operation switch group 64.

  In S31, the face detection unit 204 performs face detection from the through image. A specific method of face detection is a face detection method by edge detection or shape pattern detection, a feature point vector approximation method by vectorizing feature points that are coordinates of feature parts, and approximating feature point vectors, hue detection or A known method such as a region detection method by skin color detection can be used. If a face is detected, the process proceeds to S32. If not detected, the process proceeds to S34. Note that the face detection area may be limited to R1 as in the second embodiment, or may be divided as in the third embodiment.

  S32-34 is the same as S2-4. In FIG. 9, since the face area F is detected in the through image (or the image I2 is acceptable), the peripheral light attenuation correction is performed by increasing the gain.

  When a face is detected within the view angle (or image I2), it is predicted that the face will move in advance. Therefore, when a face is detected, it is assumed that a moving object has been detected. The same correction is performed. When a face is not detected, peripheral light reduction correction is performed to synthesize a plurality of images. However, when a face is not detected, moving object detection may be performed in the same manner as in the first to third embodiments, and the correction method may be switched according to the presence or absence of the moving object detection.

Camera block diagram Flowchart of photographing process according to the first embodiment The figure which shows an example of the peripheral darkening correction which concerns on 1st Embodiment Flowchart of photographing process according to the second embodiment The figure which shows an example of the peripheral darkening correction which concerns on 2nd Embodiment Flowchart of photographing process according to the third embodiment The figure which shows an example of the peripheral darkening correction which concerns on 3rd Embodiment Flowchart of photographing process according to the fourth embodiment The figure which shows an example of the peripheral darkening correction which concerns on 4th Embodiment The figure which shows an example of the moving body in a view angle

14: photographing lens, 50: CPU, 52: flash light, 74: CCD, 201: first correction unit, 202: second correction unit, 203: motion detection unit, 204: face detection unit

Claims (7)

An imaging unit that photoelectrically converts an object image formed through an imaging optical system by an imaging element and outputs an image; and
A moving object detection unit that detects a movement of a subject based on a desired reference image output by the imaging unit;
A first correction unit that performs peripheral dimming correction on the desired correction target image output from the imaging unit by increasing the gain of the image signal of the image;
A second correction unit that performs peripheral dimming correction by adding another image obtained from the imaging unit to a desired correction target image output from the imaging unit;
Depending on whether the movement of the subject is detected from the reference image by the moving object detection unit, the correction method of the peripheral light reduction of the correction target image is the correction of the first correction unit or the correction of the second correction unit. A control unit that performs switching control;
An imaging apparatus comprising:   The imaging apparatus according to claim 1, wherein the moving object detection unit detects a movement of a subject within a predetermined correction range set in the reference image. The moving object detection unit detects a movement of a subject for each predetermined section set in the reference image,
The control unit is configured to reduce the peripheral dimming of the correction target image for each section of the correction target image corresponding to the section according to whether or not the motion of the subject in each section of the reference image is detected by the moving body detection unit. The imaging apparatus according to claim 1, wherein control is performed to switch the correction method to correction of the first correction unit or correction of the second correction unit.   The said moving body detection part detects the motion vector of a to-be-photographed object based on the some image for a reference output from the said imaging part, and detects the motion of the said object by the presence or absence of the detection of the said motion vector. The imaging device according to any one of the above. The said moving body detection part detects the face area | region of a to-be-photographed object based on the said reference image, and pretends that the movement of the to-be-photographed object was detected according to the presence or absence of the detection of the said face area | region. The imaging device described. The imaging device
Detecting a movement of a subject based on a desired reference image output by an imaging unit that photoelectrically converts an image of a subject formed through an imaging optical system using an imaging element and outputs the image;
Performing peripheral light reduction correction by increasing the gain of the image signal of the image for a desired correction target image output from the imaging unit;
Performing peripheral dimming correction by adding another image obtained from the imaging unit to a desired correction target image output from the imaging unit;
Depending on whether the movement of the subject is detected from the reference image by the moving object detection unit, the correction method of the peripheral light reduction of the correction target image is the correction of the first correction unit or the correction of the second correction unit. A step of performing switching control;
A peripheral dimming correction control method for executing.   A peripheral dimming correction control program for causing an imaging apparatus to execute the peripheral dimming correction control method according to claim 6.

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