JP2007235806A - Image processor, photographic device, image processing method, and control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately correct an image including uneven blurring in a screen. <P>SOLUTION: A control section 10 for controlling a portable video camera 1 obtains a blurring angle in photographing the image, sets a reference position of the blurring amount in the photographed image based on a photographing condition, finds the blurring among at the set reference position based on the obtained blurring angle, and correct the blurring of the photographed image based on the found blurring amount. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image processing apparatus that processes a captured image to generate an output image, an imaging apparatus having the function of the image processing apparatus, an image processing method in the image processing apparatus, and a control program.

2. Description of the Related Art Conventionally, an image correction process for correcting an image including a shake due to camera shake at the time of shooting is known. As an example of an apparatus that performs such image correction processing, there is an imaging apparatus that changes correction conditions for correcting an image in accordance with zoom magnification (see, for example, Patent Document 1).
JP-A-7-750001

  By the way, blurring of an image is not always uniform over the entire screen, and there may be a difference in the amount of blurring within the screen. In such a case, it is difficult to determine an appropriate correction amount corresponding to the shake amount, and correction as desired may not be performed.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to appropriately correct an image including non-uniform blur in a screen.

In order to achieve the above object, the present invention provides a blur angle acquisition unit that acquires a blur angle at the time of image shooting, and a reference position setting that sets a reference position of a blur amount in the shot image based on the shooting conditions at the time of shooting. And a shake amount calculating means for obtaining a shake amount at a reference position set by the reference position setting means based on a shake angle obtained by the shake angle obtaining means, and a shake amount obtained by the shake amount calculating means. And a correction means for correcting blur of the photographed image.
According to this configuration, the reference position in the photographed image is determined based on the photographing condition, and the blur of the photographed image is corrected based on the blur amount of the reference position. Therefore, the optimum reference position for an image including uneven blur is determined. The blur at this reference position is corrected particularly well. Accordingly, it is possible to effectively perform shake correction in accordance with the photographer's intention and the characteristics of the captured image.

In the image processing apparatus of the present invention, the reference position setting unit may set a reference position of a blur amount in the captured image based on a zoom magnification at the time of shooting. In this case, the blur correction according to the photographer's intention and the characteristics of the photographed image can be performed at high speed by low-load processing. For example, when the zoom magnification is high, the central subject intended by the photographer is likely to be located in the center of the screen, and the center of the screen is used as the reference position in response to the shallow depth of field. When blur correction is performed and the zoom magnification is low, the photographer is more likely to want to shoot the entire area around the screen and the depth of field is deep. As a reference position, shake correction can be performed, and shake can be corrected effectively.
Further, the reference position setting means may set one of a central portion and a peripheral portion of the photographed image as a reference position for a shake amount in the photographed image. In this case, since effective blur correction can be performed by selecting one of the two types of processing, the above-described effect can be performed at high speed with low load processing.
Further, the correction unit may correct a shake of the photographed image by trimming a specific region in the photographed image and changing a position of the region to be trimmed based on a blur amount. As a result, it is possible to efficiently perform shake correction according to the amount of shake by low-load processing.

  In order to achieve the above object, the present invention provides a photographing unit that performs photographing and outputs a photographed image, a blur angle obtaining unit that obtains a blur angle at the time of photographing by the photographing unit, and a photographing condition in the photographing unit. Based on the reference position setting means for setting the reference position of the shake amount in the captured image, and the shake amount at the reference position set by the reference position setting means based on the shake angle acquired by the shake angle acquisition means There is provided a photographing apparatus comprising: a blur amount calculating means for obtaining a correction amount; and a correcting means for correcting a blur of the photographed image based on the blur amount obtained by the blur amount calculating means.

  In the configuration of the photographing apparatus, the photographing unit sequentially photographs frames constituting a moving image, the blur angle obtaining unit obtains a blur angle in a photographing period of the frame, and the correction unit includes the correction unit The frames may be corrected sequentially.

  In order to solve the above-described problem, the present invention acquires a blur angle at the time of image shooting, sets a reference position for the amount of blur in the shot image based on the shooting conditions at the time of shooting, and sets the acquired blur angle. The present invention provides an image processing method characterized in that a blur amount at a set reference position is obtained and the blur of the photographed image is corrected based on the obtained blur amount.

  In order to solve the above-described problem, the present invention provides a control program executed by a computer for controlling an image processing apparatus, wherein the computer is a shake angle acquisition unit that acquires a shake angle at the time of image shooting. The reference position setting means for setting the reference position of the shake amount in the photographed image based on the shooting conditions at the time of shooting, and the reference position setting means based on the shake angle acquired by the shake angle acquisition means. There is provided a control program that functions as a shake amount calculation unit that calculates a shake amount at a reference position, and a correction unit that corrects the shake of the photographed image based on the shake amount obtained by the shake amount calculation unit. .

  In addition to being applied to the above-described image processing apparatus, photographing apparatus, image processing method, and control program, the present invention enables the control program to be downloaded via an electrical communication line, or a magnetic recording medium, optical recording It can also be implemented in such a manner that it is stored in a computer-readable recording medium such as a medium or a semiconductor recording medium and distributed.

  According to the above configuration, an optimum reference position is determined for an image including non-uniform blur, and the blur at this reference position is corrected particularly well, so that it is effective in accordance with the photographer's intention and the characteristics of the photographed image. Blur correction can be performed.

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a case where the present invention is applied to a portable digital video camera (hereinafter simply referred to as a “portable video camera”) as one embodiment of an electronic device will be described.
FIG. 1 is a block diagram showing a configuration of a portable video camera 1 according to the present embodiment. This portable video camera 1 is an application of the image processing device and the photographing device of the present invention. As shown in FIG. 1, the control unit 10, the photographing unit 20, the angular velocity detecting unit 30, the operating unit 40, the removable unit. A medium 50, an I / F unit 51, and a video output terminal 52 are provided.
The portable video camera 1 can capture a still image and a moving image composed of continuous frames, and can correct it as described later. In the present embodiment, a case where a moving image is captured by the portable video camera 1 will be described as an example.

  The control unit 10 has a function of controlling each unit of the portable video camera 1, and includes a CPU 11 that executes various programs and performs arithmetic processing, and a rewritable flash that stores the control program 100 executed by the CPU 11 and various data. A ROM 12, a RAM 13 that functions as a work area for temporarily storing calculation results and various data of the CPU 11, and a timer circuit 14 that counts time are provided. The control program 100 stored in the ROM 12 includes a shake correction program 100A, and the control unit 10 executes the shake correction program 100A at the time of shooting to eliminate the influence of camera shake at the time of shooting. , Realize motion-free video display.

  The control program 100 can be recorded and distributed on a computer-readable recording medium 60 such as a portable memory using a CD-ROM, DVD-ROM, flexible disk, or semiconductor storage element. Further, the personal computer and the portable video camera 1 are communicably connected by a cable or the like, and the control program 100 of the recording medium 60 read by the personal computer is output to the portable video camera 1 so that the flash ROM 12 is controlled. It is also possible to store the program 100.

  The photographing unit 20 functions as photographing means for photographing a subject as a moving image, and includes a camera control circuit 21, a photographing camera 22, a photographing unit RAM 23, and a display panel 24. The camera control circuit 21 controls each unit of the photographing unit 20 under the control of the control unit 10. The photographing camera 22 sequentially outputs frame data (hereinafter simply referred to as “frame”) in which the subject is imaged to the camera control circuit 21 at a predetermined sampling rate. An image sensor in which elements are arranged in a matrix or honeycomb, an optical lens system having a plurality of optical lenses, and a lens driving device for driving the optical lens system to achieve zooming, focusing, a diaphragm, etc. An analog signal image acquired by the image sensor is converted into a digital signal, and an A / D conversion circuit that outputs image data is provided. A moving image shot by the shooting unit 20 is recorded as a set of a plurality of continuous still images of 30 frames per second (30 fps), for example, and image processing can be performed for each frame.

The photographing unit RAM 23 functions as a buffer for temporarily storing frames. Further, the display panel 24 has a function of displaying various information such as a captured moving image and a setting screen, and is configured by a flat display panel such as a liquid crystal display panel or an organic EL panel, for example. The removable medium 50 is a recording medium for storing moving image data at the time of shooting, and includes, for example, a video tape, a recordable optical disk, and a removable hard disk.
Under such a configuration, the frame output from the photographing camera 22 is subjected to predetermined image processing by the camera control circuit 21 and then temporarily stored in the photographing unit RAM 23, and is also removable media via the control unit 10. 50 are sequentially stored as moving image data. The frame stored in the imaging unit RAM 23 is used when displayed on the display panel 24, and the moving image data stored in the removable medium 50 is used when displaying (reproducing) the captured moving image after shooting.

The angular velocity detection unit 30 is a portable type centered on three axes of the X axis, the Y axis, and the Z axis in an XYZ orthogonal space coordinate system virtually set around the main body of the portable video camera 1. The angular velocity of the video camera 1 is detected. In this coordinate system, the X axis is a straight line parallel to the imaging surface of the portable video camera 1, the Y axis is a vertical line parallel to the imaging surface of the portable video camera 1, and the Z axis is a portable type. This corresponds to the normal line of the imaging surface of the video camera 1.
Specifically, the angular velocity detection unit 30 includes an X-axis gyro sensor 31 that detects an angular velocity of rotation about the X axis, a Y-axis gyro sensor 32 that detects an angular velocity of rotation about the Y axis, and a Z axis. Is provided with a Z-axis gyro sensor 33 for detecting an angular velocity of rotation around the axis. Each of the X-axis gyro sensor 31, the Y-axis gyro sensor 32, and the Z-axis gyro sensor 33 outputs an angular velocity detection signal having a voltage value corresponding to the angular velocity to the control unit 10. The control unit 10 takes in the angular velocity detection signals of the respective gyro sensors 31, 32, and 33 in synchronization with the sampling period of the frame 70, calculates the shake angle for each of the X axis, the Y axis, and the Z axis, and associates it with the frame. Alternatively, it is added to the frame and stored in the removable medium 50.

Here, a process of calculating the amount of camera shake based on the angular velocity detected by the angular velocity detection unit 30 will be described.
The control unit 10 calculates the angular velocity (rad / second) based on the angular velocity detection signal output from the angular velocity detection unit 30, and integrates the angular velocity (rad / second) with time (second) to obtain the blur angle θ ( rad) is calculated. The time for integrating the angular velocity is, for example, a frame sampling interval (seconds), that is, a time from the start of the previous frame shooting to the start of the correction target frame shooting. In this case, an easily viewable moving image can be obtained by minimizing the change in the position of the subject between the previous frame and the frame to be processed.
Then, as described below, the control unit 10 calculates the blur amount as the number of pixels (dot) based on the blur angle θ.

FIG. 2 shows the amount of shake when the portable video camera 1 is rotated about a predetermined axis.
In FIG. 2, the symbol A is a point located at the edge of the screen, and the symbol B is a point located at the center of the screen. In the figure, α indicates an angle (rad) corresponding to one half of the angle of view, θ is a shake angle (rad) at the edge of the screen, θ ′ is a shake angle (rad) at the center of the screen, L indicates a focal length, and H indicates a length corresponding to one half of the screen width.
Point A located at the edge of the screen moves to point A ′ due to camera shake. The movement amount x (dot) of the point A-A ′ at this time is obtained by the following equation (1).
x = L {tan (α + θ) −tan α} (1)
The above equation (1) can be modified as shown in the following equations (2) to (5) using approximation.

上記式（５）において、焦点距離Ｌはズーム倍率等により定まり、また、画角αは携帯型ビデオカメラ１の仕様とズーム倍率により定まる。従って、Ｌ（１＋ｔａｎ²α）は、ズーム倍率と携帯型ビデオカメラ１の仕様により定まる係数（β）とすることができ、上記式（５）より下記式（６）が導かれる。
ｘ＝Ｌ（１＋ｔａｎ²α）θ＝β・θ ・・・（６）

In the above formula (5), the focal length L is determined by the zoom magnification or the like, and the angle of view α is determined by the specifications of the portable video camera 1 and the zoom magnification. Therefore, L (1 + tan ² α) can be a coefficient (β) determined by the zoom magnification and the specifications of the portable video camera 1, and the following equation (6) is derived from the above equation (5).
x = L (1 + tan ² α) θ = β · θ (6)

Further, the point B located at the center of the screen moves to the point B ′ due to camera shake. The movement amount x ′ (dot) of this point BB ′ is obtained by the following equation (7).
x ′ = L · tan θ ′ (7)
According to the above formula (6), the blur amount x of the edge of the screen and its periphery (hereinafter collectively referred to as the screen peripheral portion) is obtained, and according to the above formula (7), the center of the screen and its periphery (hereinafter referred to as the screen periphery). , Collectively referred to as the center of the screen).

  It should be noted that the voltage value of the angular velocity detection signal when the angular velocity (rad / sec) is zero varies depending on individual differences of the gyro sensors 31, 32, 33, and so on in this embodiment, after the main body is turned on. Before the start of photographing, the angular velocity detection signals of the respective gyro sensors 31, 32, 33 are sampled in a stopped state without shaking, and the average value is set as the zero point voltage value. At this time, when a plurality of zero point voltage values are obtained over a certain period of time, and the difference between the zero point voltage values and the average value of these zero point voltage values is a predetermined value or less, a certain percentage (eg, 99%) or more is obtained. In addition, the average value of the zero point voltage values is set as the actual zero point voltage value, which makes it possible to set the zero point voltage value when the main body is in a stopped state.

  The operation unit 40 includes a plurality of operation elements operated by the user, and includes operation keys for inputting various instructions such as a power button and shooting start / end, for example. The I / F unit 51 is an interface for connecting the portable video camera 1 to a personal computer through a cable or the like so that the video data stored in the removable medium 50 can be output to the personal computer. Is output to the personal computer via the I / F unit 51. The video output terminal 52 is a terminal for outputting a video signal of a moving image to an external display device such as a television or a projector. In addition to the above-described components, the portable video camera 1 includes an audio circuit for capturing and recording / reproducing audio signals, an audio output terminal for outputting audio signals to an external speaker, an external amplifier, and the like. It is configured with.

Then, the portable video camera 1 executes a shake correction program 100A that executes a shake correction program 100A stored in the flash ROM 12 to correct a shake of a frame shot by the shooting unit 20 and create a corrected image. To do.
Here, the process of correcting the frame will be described with a specific example.

  As shown in FIG. 3A, when camera shake occurs during moving image shooting by the portable video camera 1, the relative position of the shooting target range with respect to the subject moves. Here, the photographed frame 70 is an image composed of more pixels than the image output from the portable video camera 1 via the video output terminal 52 and the like, and the control unit 10 An image obtained by trimming a part of the image is generated, and this image is output. At that time, if the area to be trimmed is moved, the influence of camera shake can be reduced.

  That is, as shown in FIG. 3B, the portable video camera 1 trims the output unit 71 from the captured frame 70 to obtain a corrected image. The position of the output unit 71 in the frame 70 is at the center position of the frame 70 in the initial state, but can be arbitrarily changed from this initial state. Therefore, when the subject in the frame 70 moves due to camera shake at the time of shooting, the output unit 71 is moved so as to compensate for this (in the direction opposite to the blur direction), and the output unit 71 after the movement is trimmed. As a result of this processing, a corrected image 72 is obtained in which the position of the subject is the same as before the occurrence of blurring as shown in FIG. The amount of movement of the output unit 71 in this case (symbol M in the figure) is called a correction amount. By this processing, the movement of the frame 70 due to camera shake (apparent movement of the subject in the frame 70) is offset by the movement of the output unit 71, and the influence of camera shake is eliminated.

The correction amount M is determined by multiplying the shake amount in the frame 70 by the correction magnification r as shown in the following equation (8). When the correction magnification r is 1, the correction amount M is equal to the shake amount. When the correction magnification r is 0.5, the correction amount M is half of the shake amount. If the correction magnification is less than 1.0, the correction amount M is smaller than the blur amount, which is effective when it is desired to avoid a sense of discomfort due to the subject in the frame 70 not moving at all.
M = r · x (8)
Further, an upper limit is set for the correction amount M obtained by the above equation (8). This upper limit is called a correction upper limit value. The correction upper limit value is set in order to prevent the subject from moving too much when the amount of blurring is extremely large, resulting in an unnatural image or an image that is difficult to see. When the correction amount M obtained by the above equation (8) exceeds the correction upper limit value, the correction amount M is set to the same value as the correction upper limit value.

By the way, the shake amount of the frame 70 is different between the peripheral portion of the screen and the central portion of the screen. For this reason, in the shake correction processing described later, the above formulas (6) and (6) are used depending on whether the shake is corrected based on the shake amount at the periphery of the screen or the shake amount is corrected based on the shake amount at the center of the screen. Select one of (7). In the present embodiment, the selection criterion is the zoom magnification in the photographing unit 20. When the zoom magnification is higher than a predetermined value (telephoto side), the amount of blur at the center of the screen is used as a reference, and when the zoom magnification is lower than the reference value (at the wide angle side), the amount of shake at the periphery of the screen is used as a reference.
Generally, when shooting on the telephoto side, the subject that the photographer aims at is often located in the center of the screen, so if you correct the blur based on the amount of blur at the center of the screen, the photographer The desired subject is better reflected. Also, when the zoom magnification is high, the depth of field is shallow, so it is unlikely that the image will be completely focused on the screen periphery, and it is desirable to give priority to the image quality at the center of the screen, and blurring will remain in the screen periphery. Is less likely to cause discomfort. On the other hand, when shooting on the wide-angle side, since the depth of field is deep, it can be said that it is desirable for the photographer to capture the entire screen, and it is important that there is little blur around the screen. . For this reason, when the zoom magnification is equal to or less than the reference value, it can be said that it is suitable for the photographer's request to correct the blur based on the blur amount at the periphery of the screen.

FIG. 4 is a flowchart showing the shake correction process. The blur correction process shown in FIG. 4 is realized by the CPU 11 executing the blur correction program 100A stored in the flash ROM 12. The control unit 10 that executes the shake correction process of FIG. 4 functions as a shake angle acquisition unit, a reference position setting unit, a shake amount calculation unit, and a correction unit.
When blur correction is started (step S11), the CPU 11 calculates the focal length from the zoom magnification set by the camera control circuit 21 (step S12).
Subsequently, the CPU 11 calculates a correction magnification based on the zoom magnification acquired in step S12 and the calculated focal length, sets the correction magnification, and sets a correction upper limit value (step S13). When the zoom magnification is high, camera shake is amplified, so that a larger blur appears in the shot frame. For this reason, when the zoom magnification is high, the correction magnification is increased and the correction upper limit value is increased so that larger blur can be corrected. If the zoom magnification is low, the correction magnification is lowered and the correction upper limit value is set low.

Then, the CPU 11 selects an expression for obtaining the shake amount from the above expressions (6) and (7) based on the zoom magnification (step S14). By this selection, it is determined whether the center of the screen is the reference or the periphery of the screen is the reference. The CPU 11 performs an arithmetic process using the selected formula to calculate a correction amount (step S15), corrects the correction target frame according to the calculated correction amount, and outputs a corrected image (step S16).
Thereafter, the CPU 11 determines whether or not to end the shooting (step S17). When the shooting is continued (step S17; No), the CPU 11 returns to step S12 to correct the next frame. Thereby, when the frames constituting the moving image are sequentially input from the photographing unit 20, the CPU 11 sequentially corrects these frames. Then, along with the end of photographing (step S17; Yes), this process is terminated.

  As described above, the portable video camera 1 according to the embodiment to which the present invention is applied has a function of correcting shake according to camera shake in a frame shooting period for frames constituting a moving image. Depending on the zoom magnification at the time of shooting, either the center of the screen or the periphery of the screen is selected as a reference position, and the blurring of the frame is corrected based on the amount of blurring at the selected position. Accordingly, it is possible to effectively perform shake correction in accordance with the photographer's intention and the characteristics of the frame. In particular, by determining the reference position based on the zoom magnification, blur correction according to the photographer's intention and frame characteristics can be performed at high speed by low-load processing. Furthermore, since a specific region in the frame is trimmed and the frame is corrected by changing the position of the region to be trimmed based on the amount of blur, the blur correction according to the amount of blur is efficiently performed by low-load processing. be able to.

In the above embodiment, the blurring is performed by using either the blur amount x of the screen peripheral portion obtained by the above equation (6) or the blur amount x ′ of the screen central portion obtained by the above equation (7). Although the correction is made, the present invention is not limited to this. For example, as shown in FIG. 5, the blur amount x ″ when the point C located between the center and the edge of the screen moves to the point C ′ due to camera shake is obtained by modifying the above equation (6). It calculates | requires by following formula (9).
x ″ = L (1 + tan ² δ) θ ″ (9)
Where δ is the angle of view (rad) at point C, and θ ″ is the angle of deflection (rad) at point C.
This equation (9) can determine the amount of blurring at a point at an intermediate position that cannot be said to be either the center (viewing angle 0) or the end (viewing angle α) of the screen. Therefore, by making it possible to select the expression (9) in combination with the above expressions (6) and (7), the position serving as the reference for blur correction can be set to an arbitrary position in the frame, and the zoom magnification can be increased. The reference point can be moved with fine correspondence.

  Further, for example, in the above-described embodiment, it has been described that either the screen center portion or the screen peripheral portion is selected based on the zoom magnification, but in addition to this, it is determined whether the aperture value is the open side or the aperture side. It is also possible to select based on. When the aperture is at the open side, the depth of field becomes shallow, so it is important that there is no blur at the center of the screen. On the other hand, there is often no problem if there is blur at the periphery of the screen. In the case of the aperture side, since the depth of field is deep, it is important that there is no blur in the peripheral portion. Correspondingly, effective blur correction can be performed by selecting the center of the screen when the aperture value is at the open side and using the periphery of the screen as the reference when the aperture value is on the aperture side.

  Further, for example, in the above-described embodiment, an example in which the blur correction process is performed on the frame 70 photographed by the photographing unit 20 has been described. However, for example, a moving image including a plurality of frames stored in the removable medium 50 or the like. The blur correction process may be performed during the display (reproduction). That is, if the data of the shot frame and the data indicating the amount of blur at the time of shooting each frame are stored in the removable medium 50 or the like, the blur correction process can be executed in another device that does not have the shooting function. Is possible. Furthermore, according to the above-described embodiment, the portable video camera 1 has been described by taking as an example a case where a moving image composed of continuous frames is shot by the shooting unit 20, but the present invention is limited to this. Instead of this, a still image may be taken and the still image may be corrected. In this case, the blur angle may be obtained by integrating the angular velocity during the exposure time based on the angular velocity detection signal output from the angular velocity detection unit 30 during still image shooting (during the exposure time).

In the embodiment and the modification, the angular velocity is detected by the gyro sensor unit 30 including the gyro sensors 31, 32, 33 in order to detect the movement of the digital camera 1. However, the present invention is not limited to this. For example, an acceleration sensor can be used as long as the amount of movement of the digital camera 1 per unit time can be detected.
Further, the present invention can also be applied to a photographing apparatus having a moving image photographing function other than the portable video camera 1 described in the above embodiment and the modified examples. The present invention can also be applied to a digital still camera and various electronic devices such as a mobile phone, a PDA, and a notebook personal computer equipped with such a digital still camera.

It is a block diagram which shows the structure of the digital camera which concerns on embodiment. It is a figure for demonstrating calculation of the amount of camera shake. It is a figure which shows the mode of blurring correction. It is a flowchart which shows a blurring correction process. It is a figure for demonstrating calculation of the amount of camera shake.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Portable digital video camera (imaging apparatus, image processing apparatus), 10 ... Control part (blur angle acquisition means, reference position setting means, blur amount calculation means, correction means), 20 ... Shooting part (imaging means), 24 DESCRIPTION OF SYMBOLS ... Display panel, 30 ... Angular velocity detection part, 50 ... Removable medium, 60 ... Recording medium, 70 ... Frame, 71 ... Output part, 72 ... Correction image, 100 ... Control program, 100A ... Shake correction program.

Claims (8)

A shake angle acquisition means for acquiring a shake angle at the time of image shooting;
A reference position setting means for setting a reference position of a blur amount in a photographed image based on photographing conditions at the time of photographing;
Based on the shake angle acquired by the shake angle acquisition means, the shake amount calculation means for obtaining the shake amount at the reference position set by the reference position setting means,
Correction means for correcting the shake of the captured image based on the shake amount obtained by the shake amount calculation means;
An image processing apparatus comprising:   The image processing apparatus according to claim 1, wherein the reference position setting unit sets a reference position of a blur amount in the captured image based on a zoom magnification at the time of shooting.   The image processing according to claim 1, wherein the reference position setting unit sets one of a central portion and a peripheral portion of the photographed image as a reference position of a blur amount in the photographed image. apparatus.   The correction means trims a specific region in the photographed image and corrects the blur of the photographed image by changing the position of the region to be trimmed based on a blur amount. The image processing apparatus according to any one of 1 to 3. Photographing means for performing photographing and outputting a photographed image;
A shake angle obtaining means for obtaining a shake angle at the time of photographing by the photographing means;
A reference position setting means for setting a reference position of a blur amount in the photographed image based on a photographing condition in the photographing means;
Based on the shake angle acquired by the shake angle acquisition means, the shake amount calculation means for obtaining the shake amount at the reference position set by the reference position setting means,
Correction means for correcting the shake of the captured image based on the shake amount obtained by the shake amount calculation means;
An imaging apparatus comprising: The photographing means sequentially photographs frames constituting a moving image,
The shake angle acquisition means acquires a shake angle in the shooting period of the frame,
The correcting means sequentially corrects the frames;
The imaging device according to claim 5. Obtaining the shake angle at the time of image shooting, setting the reference position of the shake amount in the shot image based on the shooting conditions at the time of shooting, and obtaining the shake amount at the set reference position based on the acquired shake angle, Correcting blur of the captured image based on the calculated amount of blur,
An image processing method characterized by the above. A control program executed by a computer for controlling an image processing apparatus,
The computer,
A shake angle acquisition means for acquiring a shake angle at the time of image shooting;
A reference position setting means for setting a reference position of a blur amount in a photographed image based on photographing conditions at the time of photographing;
Based on the shake angle acquired by the shake angle acquisition means, the shake amount calculation means for obtaining the shake amount at the reference position set by the reference position setting means,
Correction means for correcting the shake of the captured image based on the shake amount obtained by the shake amount calculation means;
Control program to function.

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