JP2009284101A - Imaging device and control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device which suppresses deterioration in image quality of a peripheral part that an image photographed using an optical hand shake correcting mechanism may have. <P>SOLUTION: Based on, for example, a shutter speed during photography, the degree of an amount of hand shake correction of the image by the optical hand shake correcting mechanism during the photography is determined. A parameter which is larger in correction amount of peripheral part pixels of the image is set, as a parameter used for correction processing, for an image determined to be slow in shutter speed and high in the degree of the amount of hand shake correction than for an image determined to be low in degree of the amount of hand shake correction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus and a control method thereof, and more particularly, to an imaging apparatus having an optical image stabilization mechanism and a control method thereof.

  Some recent image pickup apparatuses have a camera shake correction mechanism for reducing a camera shake phenomenon in which the image pickup apparatus moves during hand-held shooting and a photographed image is blurred. Various types of camera shake correction mechanisms have been proposed, and among them, an optical camera shake correction mechanism is known as one having a high effect of camera shake correction (Patent Document 1).

  The optical camera shake correction mechanism is realized by a camera shake detection system and a correction system. The camera shake detection system detects a shake amount and a shake direction of the apparatus from an output of an angular velocity sensor or the like attached to the imaging apparatus. In addition, the correction system moves the optical axis shift lens provided in the incident optical path from the subject so as to cancel the movement of the subject image in the direction and direction of the detected blur, so that the subject light reaching the image sensor To stabilize.

JP 2006-317848 A

  Strictly speaking, an image photographed using the optical image stabilization mechanism is equivalent to an image obtained by multiple exposure of a subject image in a state where the optical axis shift lens is moved to various positions during photographing (during exposure). It can be said.

  At this time, the blur is effectively corrected in the portion where the light passing through the vicinity of the optical axis of the lens is subjected to multiple exposure, that is, the central portion of the image, and an image with high resolution is obtained. However, there is a problem that the degree of blurring and blurring may be relatively larger in the portion where light passing through the lens peripheral portion having low optical performance is exposed, that is, in the peripheral portion of the image than in the central portion of the image. there were. This problem is considered to increase as the number of images subjected to multiple exposure increases, that is, as the amount of movement of the optical axis shift lens during exposure increases, and as the exposure time increases (the shutter speed decreases).

  The present invention has been made in view of the above-described problems of the prior art, and provides an imaging apparatus and a control method therefor that suppress deterioration in image quality in the peripheral portion that may occur in an image captured using an optical camera shake correction mechanism. The purpose is to do.

  An object of the present invention is an image pickup apparatus having an optical image stabilization mechanism, an image processing unit that performs correction processing on a captured image, and a parameter that the image processing unit uses for correction processing. And setting means for setting the image processing means, and the setting means determines the degree of camera shake correction amount by the optical camera shake correction mechanism at the time of image shooting, and determines that the degree of camera shake correction amount is high. In contrast, an image pickup apparatus is characterized in that a parameter that increases a correction amount for peripheral pixels of an image is determined as a parameter used for correction processing, compared to an image that is determined to have a low degree of camera shake correction amount. Achieved by:

  Another object of the present invention is to provide a method for controlling an image pickup apparatus having an optical image stabilization mechanism and an image processing unit that performs correction processing on a captured image. The image processing unit sets parameters used for correction processing. A setting step for determining and setting the determined parameters in the image processing means. In the setting step, the degree of camera shake correction by the optical camera shake correction mechanism at the time of image capture is determined, and the degree of camera shake correction is high. For an image to be discriminated, a parameter that increases the correction amount for the peripheral pixels of the image is determined as a parameter to be used for correction processing, compared to an image that is discriminated that the degree of camera shake correction is low. This can also be achieved by the control method of the imaging apparatus.

  With such a configuration, according to the present invention, it is possible to suppress deterioration in image quality at the peripheral portion that may occur in an image shot using the optical camera shake correction mechanism.

(First embodiment)
Hereinafter, exemplary and preferred embodiments of the present invention will be described in detail with reference to the drawings.
(Configuration of imaging device)
FIG. 1 is a block diagram illustrating a schematic configuration example of an imaging apparatus according to the first embodiment of the present invention. The imaging apparatus of the present embodiment has an optical camera shake correction mechanism.

  A light beam representing a subject image is collected by a lens system 1 including an optical axis shift lens and is incident on an image sensor 2 such as a CCD image sensor or a CMOS image sensor. The analog signal processing circuit 3 performs analog signal processing such as correlated double sampling on the pixel-by-pixel video signal output from the image sensor 2. The video signal output from the analog signal processing circuit 3 is converted into digital data by the A / D conversion circuit 4 and input to the control circuit 11 and the image processing circuit 6.

  The image quality parameter setting circuit 5 determines image quality parameters (contrast correction amount, edge enhancement correction amount) for correction processing performed by the image processing circuit 6, and sets the determined image quality parameters in the image processing circuit 6. In the present embodiment, the image quality parameter setting circuit 5 determines the image quality parameter based on the shooting conditions. Further, the image quality parameters are stored in advance in the image quality parameter setting circuit 5 as a table or a function, for example.

FIG. 3 is a diagram illustrating an example of a plurality of gamma characteristic curves that receive a luminance signal.
In the image quality parameter setting circuit 5, a gamma characteristic curve for performing contrast correction processing on the photographed image is selected from a plurality of gamma characteristic curves 301 to 303 shown in FIG. 3 according to the shutter speed (exposure time). To the image processing circuit 6. This contrast correction process is performed on the entire image in accordance with the luminance signal, regardless of the actual movement locus of the optical shift lens.

  For example, the gamma characteristic curve 301 is a gamma characteristic curve for obtaining an image having a standard contrast with respect to the input image, and performs a contrast correction process on an image shot under shooting conditions in which camera shake correction is practically unnecessary. Select when.

  As described above, when the use of the optical image stabilization mechanism is set (hereinafter referred to as “optical image stabilization is effective”) and the shutter speed is slow (exposure time is long), blurring and blurring in the peripheral portion of the image are caused. It tends to occur. For this reason, in the present embodiment, the image quality parameter setting circuit 5 displays the gamma characteristic curves 302 and 303 that increase the contrast of the low-brightness portion of the input image when the optical camera shake correction is effective and the shutter speed is slow. Select (decide). As a result, blurring and blurring in the peripheral portion of the image due to the effect of optical camera shake correction can be made inconspicuous (apparently reduced).

  Further, the image quality parameter setting circuit 5 selects not only the parameters for contrast correction processing but also the parameters for edge enhancement processing from a plurality of characteristics according to the shutter speed and sets them in the image processing circuit 6.

  In edge enhancement processing, first, an edge component is extracted by applying a bandpass filter to the input image, signal components below a predetermined level are removed from the extracted edge component (coring processing), and then the edge enhancement gain is set. By multiplying, the level of the edge component is adjusted. Then, the edge component whose level is adjusted is added to the original input image to obtain an image in which the edge is emphasized.

  FIG. 4 is a diagram illustrating an example of a plurality of edge enhancement gain characteristic curves having different edge enhancement gain increasing characteristics with respect to image height. An edge enhancement gain characteristic curve for performing edge enhancement processing on a captured image is selected (determined) from a plurality of edge enhancement gain characteristic curves 401 to 403 shown in FIG. Set in the image processing circuit 6. This edge enhancement processing is performed on the entire image using the center of the obtained image as the reference position of the image height, regardless of the actual movement locus of the optical shift lens.

  The longer the distance from the center of the image, the better the resolution, even if there is no blur due to factors such as the lower resolution of the lens at the periphery than the vicinity of the optical axis and the effect of aberrations. Result in a low-blurred image. Therefore, as shown in the edge enhancement gain characteristic curve 401, by performing edge enhancement processing that increases the edge enhancement gain as the distance from the image center increases (the image height increases), the appropriateness that the blur is apparently reduced. Can be obtained. In this embodiment, three types of parameters (edge enhancement gain characteristics) having different edge enhancement gain increase rates with respect to an increase in image height are prepared, and parameters used for correction processing are determined from these.

  Further, when the optical camera shake correction is effective and the shutter speed is slow, not only the blur at the periphery of the image but also the image quality deterioration due to the camera shake correction becomes large. For this reason, the image quality parameter setting circuit 5 selects the edge enhancement gain characteristic curves 402 and 403 that have a higher increase rate of the edge enhancement gain for the peripheral pixels of the image. Accordingly, even when the optical axis shift lens is moved during photographing (during exposure) by the operation of the optical camera shake correction mechanism, it is possible to apparently reduce the image quality degradation that occurs in the peripheral portion of the image.

  Based on the image quality parameters set by the image quality parameter setting circuit 5, the image processing circuit 6 performs, for example, white balance processing, contrast correction processing, and edge enhancement processing on the image data output from the A / D conversion circuit 4. Perform correction processing. The image data output from the image processing circuit 6 is sent to the display unit 10 such as an LCD via the memory 7. Then, a subject image is displayed on the display screen of the display unit 10. When the shutter button included in the operation unit 13 is pressed, the subject is imaged again as described above, and image data representing the subject image is obtained. The image data is given from the image processing circuit 6 to the memory 7 and temporarily stored. The image data is read from the memory 7 and recorded by a recording control circuit 8 on a memory card 9 as an example of a recording medium.

  On the other hand, the gyro sensor 12 is a three-dimensional angular velocity sensor. At the time of shooting when the optical camera shake correction is valid, the control circuit 11 sequentially detects the movement direction (hand shake direction) and the movement amount (hand shake amount) of the imaging apparatus during exposure from the output of the gyro sensor 12. Then, the control circuit 11 controls a mechanism (actuator or the like) that drives the optical axis shift lens included in the lens system 1 and moves the optical axis shift lens so as to cancel the movement of the subject image due to the detected movement of the imaging device. Let

  The control circuit 11 includes, for example, a microprocessor, a program ROM, and a RAM, and controls the operation of the entire imaging apparatus by loading a control program stored in advance in the program ROM into the RAM and executing it.

  The operation unit 13 is an input device group such as buttons, switches, and dials for the user to give various instructions and settings to the imaging apparatus, and typically includes a shutter button, menu button, direction button, execution button, and the like. It is.

FIG. 2 is a flowchart for explaining the imaging processing operation of the imaging apparatus of the present embodiment.
When the photographer inputs a photographing instruction by fully pressing the shutter button included in the operation unit 13, the control circuit 11 detects this (S201).

  In step S202, the control circuit 11 performs shooting after performing automatic exposure control (AE), automatic focusing control (AF), and the like so that the brightness and focus of the shooting area are optimized. Note that AE and AF may be performed when half-pressing of the shutter button is detected, and shooting may be performed when full-pressing is detected. Further, since the AE and AF processes are not directly related to the present invention and a known method can be applied, detailed description thereof is omitted.

  In S203, an image signal conversion process is performed on a video signal obtained by exposing the image sensor 2. Specifically, after analog signal processing such as correlated double sampling is performed in the analog signal processing circuit 3, it is converted into digital image data in the A / D conversion circuit 4 and supplied to the image processing circuit 6.

  In S204, the image quality parameter setting circuit 5 refers to, for example, a non-volatile storage device (not shown) in which setting values are stored to determine whether or not camera shake correction is set to be used, that is, whether or not camera shake correction is enabled. judge. If the camera shake correction is not effective, the process proceeds to S207. If the camera shake correction is effective, the process proceeds to S205.

  In S205, the image quality parameter setting circuit 5 determines whether or not the shutter speed (Tv (second)) set in the AE process by the control circuit 11 is 1/30 second or more. If 1/30 seconds ≦ Tv, the process proceeds to S206. If 1/30 seconds> Tv, the process proceeds to S207.

  In S206, the image quality parameter setting circuit 5 further determines whether or not the shutter speed (Tv (second)) is 1/8 second or more. If 1/8 second ≦ Tv, the process proceeds to S209. If 1/8 second> Tv (1/8 second> Tv ≧ 1/30 second), the process proceeds to S208. As described above, the image quality parameter setting circuit 5 determines image quality parameters to be used by the image processing circuit 6 in S204 to S206.

  In S207, S208, and S209, the image quality parameter setting circuit 5 selects image quality parameter settings A, B, and C, respectively, and sets them in the image processing circuit 6.

  FIG. 5 shows an example of the parameters of the contrast correction processing and edge enhancement processing included in the image quality parameter settings A, B, and C set by the image quality parameter setting circuit 5 in the image processing circuit 6, as shown in FIG. 3 and FIG. It is the figure shown using.

  The image quality parameter setting A set in S207 is a parameter when camera shake correction is disabled or when the shutter speed is less than 1/30 seconds. Under such shooting conditions, even if the camera shake correction is effective, it is considered that the camera is practically not operating, or the influence of the camera shake correction on the image quality at the periphery of the image is slight.

  Therefore, the image quality parameter setting circuit 5 sets the corresponding parameters (gamma correction curve 301 and edge enhancement gain characteristic curve 401) in the image processing circuit 6 so as to perform standard contrast correction processing and edge enhancement processing.

  The image quality parameter setting B set in S208 is a parameter setting when camera shake correction is enabled and 1/30 seconds ≦ Tv <1/8 seconds. In the case of this photographing condition, the influence of blurring and blurring on the peripheral portion of the image due to the movement amount (camera shake correction amount) of the optical axis shift lens by the camera shake correction operation is slightly larger than usual. For this reason, the image quality parameter setting circuit 5 performs edge enhancement processing in which edge enhancement is performed slightly stronger than usual in the peripheral portion of the image, and contrast correction processing so that an image quality with a slightly higher resolution than normal is obtained. Corresponding parameters are set in the image processing circuit 6. Specifically, the image quality parameter setting circuit 5 sets the gamma correction curve 302 and the edge enhancement gain characteristic curve 402 in the image processing circuit 6.

  The image quality parameter setting C set in S209 is a parameter setting when camera shake correction is enabled and 1/8 second ≦ Tv. In the case of this photographing condition, the amount of movement (camera shake correction amount) of the optical axis shift lens by the camera shake correction operation is large, and the influence of blurring and blurring on the periphery of the image is further increased. For this reason, the image quality parameter setting circuit 5 assigns corresponding parameters to the image processing circuit so as to perform edge enhancement processing in which strong edge enhancement is performed in the peripheral portion of the image and contrast correction processing in which an image quality with higher resolution is obtained. Set to 6. Specifically, the image quality parameter setting circuit 5 sets the gamma correction curve 303 and the edge enhancement gain characteristic curve 403 in the image processing circuit 6.

  In S210, the image processing circuit 6 performs image processing according to the image quality parameters set in S207, S208, and S209.

  As described above, in the present embodiment, when optical image stabilization is enabled, uniform image correction is not performed regardless of shooting conditions, but the degree of image correction is set according to the shutter speed. change. Specifically, when the shutter speed is slow, the amount of camera shake correction is large, and the amount of blur and blurring at the periphery of the image due to camera shake compensation is greater than when the shutter speed is fast. Make the degree of correction stronger than the hour. In other words, the present embodiment selects and sets an image quality parameter having a higher degree of image correction as the camera shake correction amount estimated based on the shutter speed or the movement amount of the optical axis shift lens is larger.

  As a result, it is possible to perform image correction according to the correction amount of optical camera shake correction, and it is possible to suppress blurring and blurring at the periphery of the image particularly when the shutter speed is slow.

  In the present embodiment, in order to facilitate explanation and understanding, contrast correction processing and edge enhancement processing are illustrated as image processing for changing the degree of correction. However, the present invention is not limited to these processes, and the degree of correction can be changed for any image process that corrects the image quality affected by the optical camera shake correction.

  In addition, as an example of changing the degree of correction, an example of selecting one of three parameters having different characteristics has been described. However, one of four or more or less than three options may be selected. good. In S205 and S206, the shutter speed used as the threshold value is an example, and other values may be used. Moreover, you may comprise so that it may change dynamically according to imaging | photography conditions. For example, according to the ISO sensitivity setting, when the sensitivity is high, the shutter speed serving as a threshold value may be changed to be slow.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
In the first embodiment, the parameter that defines the degree of image quality correction processing is selected (changed) according to the shutter speed. In the present embodiment, the parameter is selected (changed) according to the amount of camera shake detected. ) Is different.
Note that the configuration of the imaging apparatus according to the present embodiment may be the same as that of the first embodiment, and thus a duplicate description is omitted.

  FIG. 6 is a flowchart showing a flow of imaging processing of the imaging apparatus of the present embodiment. In FIG. 6, the same processes as those in FIG. 2 are denoted by the same reference numerals, and redundant description is omitted.

  When camera shake correction is enabled in S204, the image quality parameter setting circuit 5 determines the degree of camera shake based on the camera shake amount (movement amount) detected by the control circuit 11 from the output of the gyro sensor 12 during exposure in S605. Determine whether it is larger. Specifically, the degree can be determined based on a comparison result between the total amount of camera shake detected during exposure and a predetermined threshold value. Here, it is assumed that the degree of camera shake is classified into three levels of large, medium, and small in S605 and S606 using two threshold values. However, the number of classifications of the degree of camera shake may be 4 or more, or less than 3.

  If it is determined in S605 and S606 that the degree of camera shake is large, the process proceeds to S209. If the degree of camera shake is determined to be medium, the process proceeds to S208. If it is determined that the degree of camera shake is small, the process proceeds to S207. Proceed with each process.

  Hereinafter, as described in the first embodiment, selection and setting of image quality parameters by the image quality parameter setting circuit 5 and image processing by the image processing circuit 6 based on the set image quality parameters are performed.

  As described above, in this embodiment, the degree of camera shake, in other words, the degree of camera shake correction or the amount of movement of the optical axis shift lens is determined based on the amount of camera shake detected during exposure. Then, an image quality parameter with a higher degree of image correction is selected and set as the degree of camera shake increases.

  Therefore, it is possible to select the image quality parameter with higher accuracy than in the first embodiment, and it is possible to effectively suppress blurring and blurring in the peripheral portion of the image when using optical image stabilization.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
In the first and second embodiments, the parameters used for the contrast correction process are common to the entire image. In contrast, the present embodiment is characterized in that different parameters are used for the central portion and the peripheral portion of the image.

  As described above, the degree of blurring or blurring of the image due to optical camera shake correction is greater in the peripheral portion of the image than in the shutter speed regardless of the central portion of the image. Therefore, in the present embodiment, the image quality parameter setting circuit 5 uses a plurality of gamma characteristic curves 301 to 301 shown in FIG. 3 as the gamma characteristic curves for performing the contrast correction process on the captured image according to the area to be corrected. The image processing circuit 6 is selected from the information 303 and set in the image processing circuit 6.

  For example, since the gamma characteristic curve 301 is a gamma characteristic curve for obtaining an image having a standard contrast with respect to the input image, the gamma characteristic curve 301 is selected and set as a parameter for performing the contrast correction processing on the central pixel of the image.

  On the other hand, the image quality parameter setting circuit 5 selects gamma characteristic curves 302 and 303 that more strongly correct the contrast of the low-brightness portion of the input image as a parameter for performing contrast correction processing on the peripheral pixels of the captured image. Set. In this way, by selecting the gamma characteristic curve 302 or 303 that improves the sense of resolution for the peripheral portion of the image, blurring and blurring in the peripheral portion of the image can be made inconspicuous (apparently reduced).

  In the image processing circuit 6, it is possible to arbitrarily set conditions for discriminating the pixels in the input image from the central pixel and the peripheral pixel. For example, as shown in FIG. 7, a pixel in a region 71 whose image height is a predetermined value (distance (number of pixels) from the center of the image 70) d or less is a central pixel, and a region 72 whose image height exceeds a predetermined value d. A pixel can be identified as a peripheral pixel, and a peripheral parameter can be applied.

  FIG. 8 shows an example of a specific combination of image quality parameters selected and set by the image quality parameter setting circuit 5 in this embodiment. The image quality parameter setting circuit 5 selects and sets these image quality parameter settings in S207 to S209 in FIG. 2 or FIG. Then, in the image processing in S210, the image processing circuit 6 determines whether the process-symmetrical pixel is the central pixel or the peripheral pixel according to a predetermined separation condition between the central portion and the peripheral portion. Then, contrast correction processing is executed using different parameters for the central pixel and the peripheral pixel.

  Note that the edge enhancement processing may be the same processing as in the first and second embodiments because the parameter having the characteristic that the correction amount is originally larger in the peripheral portion.

  As described above, according to the present embodiment, the pixel position or the pixel is included so that the correction amount for the peripheral pixel that has a strong influence on the image quality due to the optical image stabilization is larger than the correction amount for the central pixel. The image quality parameter is switched according to the area to be displayed. Accordingly, it is possible to realize effective correction for the peripheral pixels while suppressing excessive correction for the central pixels.

(Other embodiments)
The above-described embodiment can also be realized in software by a computer of a system or apparatus (or CPU, MPU, etc.).

  Therefore, the computer program itself supplied to the computer in order to implement the above-described embodiment by the computer also realizes the present invention. That is, the computer program itself for realizing the functions of the above-described embodiments is also one aspect of the present invention.

  The computer program for realizing the above-described embodiment may be in any form as long as it can be read by a computer. For example, it can be composed of object code, a program executed by an interpreter, script data supplied to the OS, but is not limited thereto.

  A computer program for realizing the above-described embodiment is supplied to a computer via a storage medium or wired / wireless communication. Examples of the storage medium for supplying the program include a magnetic storage medium such as a flexible disk, a hard disk, and a magnetic tape, an optical / magneto-optical storage medium such as an MO, CD, and DVD, and a nonvolatile semiconductor memory.

  As a computer program supply method using wired / wireless communication, there is a method of using a server on a computer network. In this case, a data file (program file) that can be a computer program forming the present invention is stored in the server. The program file may be an executable format or a source code.

Then, the program file is supplied by downloading to a client computer that has accessed the server. In this case, the program file can be divided into a plurality of segment files, and the segment files can be distributed and arranged on different servers.
That is, a server apparatus that provides a client computer with a program file for realizing the above-described embodiment is also one aspect of the present invention.

In addition, a storage medium in which the computer program for realizing the above-described embodiment is encrypted and distributed is distributed, and key information for decrypting is supplied to a user who satisfies a predetermined condition, and the user's computer Installation may be allowed. The key information can be supplied by being downloaded from a homepage via the Internet, for example.
Further, the computer program for realizing the above-described embodiment may use an OS function already running on the computer.

  Further, a part of the computer program for realizing the above-described embodiment may be configured by firmware such as an expansion board attached to the computer, or may be executed by a CPU provided in the expansion board. Good.

1 is a block diagram illustrating a schematic configuration example of an imaging apparatus according to a first embodiment of the present invention. 5 is a flowchart for explaining an imaging processing operation of the imaging apparatus according to the first embodiment of the present invention. It is a figure which shows the example of the several gamma characteristic curve which inputs a luminance signal. It is a figure which shows the example of the some edge emphasis gain characteristic curve from which the increase characteristic of the edge emphasis gain with respect to image height differs. 6 is a diagram illustrating an example of image quality parameter setting that is set in the image processing circuit 6 by the image quality parameter setting circuit 5 of the imaging device according to the first and second embodiments of the present invention. FIG. It is a flowchart for demonstrating the imaging process operation of the imaging device which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating the example of the method of discriminating a center part pixel and a peripheral part pixel in the imaging device which concerns on the 3rd Embodiment of this invention. It is a figure which shows the example of the image quality parameter setting which the image quality parameter setting circuit 5 of the imaging device which concerns on the 3rd Embodiment of this invention sets to the image processing circuit 6. FIG.

Claims (7)

An imaging apparatus having an optical image stabilization mechanism,
Image processing means for performing correction processing on the photographed image;
Determining a parameter used by the image processing means for the correction processing, and setting the determined parameter in the image processing means;
The setting means determines a degree of camera shake correction amount by the optical camera shake correction mechanism at the time of photographing an image, and for an image determined to have a high degree of camera shake correction amount, a degree of the camera shake correction amount. An image pickup apparatus, wherein a parameter that increases a correction amount for peripheral pixels of an image is determined as a parameter to be used for the correction process, compared to an image determined to be low.   The imaging apparatus according to claim 1, wherein the setting unit determines that the degree of the camera shake correction amount is higher as the shutter speed during shooting is slower. The optical camera shake correction mechanism has a detecting means for detecting a moving direction and a moving amount of the imaging device,
The imaging apparatus according to claim 1, wherein the setting unit determines a degree of the camera shake correction amount from a movement direction and a movement amount of the imaging apparatus detected by the detection unit during photographing. The correction process is a contrast correction process,
The setting unit determines a parameter for increasing the contrast of the low-luminance portion for an image determined to have a high degree of camera shake correction amount than an image determined to have a low degree of camera shake correction amount. The imaging apparatus according to any one of claims 1 to 3, wherein the imaging apparatus is configured as described above. The correction process is a contrast correction process,
The said setting means determines the parameter used for the correction process of the center part pixel of the said image, and the parameter used for the correction process of the peripheral part pixel of the said image, respectively. The imaging apparatus of Claim 1. The correction processing is edge enhancement processing;
For an image in which the setting means is determined to have a high degree of camera shake correction amount, the rate of increase in edge enhancement gain with respect to an increase in image height is higher than an image in which the degree of camera shake correction amount is determined to be low. The imaging apparatus according to claim 1, wherein a parameter having a high value is determined. An optical image stabilization mechanism;
An image pickup apparatus control method comprising image processing means for performing correction processing on a photographed image,
Determining a parameter used by the image processing unit for the correction process, and setting the determined parameter in the image processing unit;
In the setting step, the degree of camera shake correction by the optical camera shake correction mechanism at the time of image shooting is determined, and for an image determined to have a high level of camera shake correction, the degree of camera shake correction is determined. A method for controlling an imaging apparatus, wherein a parameter that increases a correction amount for peripheral pixels of an image is determined as a parameter to be used for the correction process as compared with an image that is determined to be low.

Images