JPH04336776A - Camera system - Google Patents

Abstract

PURPOSE:To provide a small-sized and light-weighted camera system by enabling a blurring correction without using a blurring correction member such as an actuator. CONSTITUTION:This system is provided with a first image pickup element 2 picking up the image of an object light, a second image pickup element capable of picking up the image of the object light as well as high speed read-out, an image blurring detector 25 detecting the image blurring from an image signal read out of the second image pickup element, and a filterling device 41 filtering the image signal read out of the first image pickup element 2 corresponding to the image blurring signal from the image blurring detector 25.

Description

[Detailed description of the invention]

The present invention relates to a camera system equipped with a so-called anti-shake function that can effectively correct blur in a subject image.

0001

2. Description of the Related Art When exposing a subject image to a film using a camera system, that is, when photographing with a camera, there is a problem of deviation of the subject image formed on the film surface, so-called hand shake (camera shake). Especially when doing long exposures,
When performing telephoto shooting or macro photography, the above-mentioned camera shake becomes a big problem.

[0002] Conventionally, in order to prevent such camera shake and take pictures with high clarity (resolution), the camera has been fixed exclusively on a tripod, or short exposures have been taken so that the problem of camera shake can be virtually ignored. To achieve this goal, auxiliary light sources such as strobes are used in combination. However, the combined use of such auxiliary means is generally very cumbersome, and there is a problem in that the handling and maneuverability of the camera are significantly impaired. As a means to solve such problems, the applicant has proposed Japanese Patent Application No. 01-343615. This application will be explained using FIG. 14.

Reference numeral 101 denotes a photographing optical lens, and 102 denotes a solid-state image sensor for electronically capturing an image of a subject formed by the photographing optical lens 101. The photographic optical lens 1
01 is driven for focusing by, for example, a distance measuring system (not shown) in order to form a subject image on the imaging surface of the image sensor 102. Further, the aperture diaphragm mechanism, shutter mechanism, etc. incorporated in the photographing optical lens 101 are driven under the control of a photometry system (not shown) so that the exposure amount of the subject image by the solid-state image sensor 102 is made constant. A feature of such a conventional camera system is that the photographing optical lens 101 is supported by the camera body via an actuator 103 and is movable within a plane orthogonal to the optical axis. Specifically, the photographing optical lens 101 is connected to an x-direction actuator 103x and a y-direction actuator 103.
These actuators 103x,
By driving the optical lens 103y, the photographing optical lens 10
1 in the x and y directions perpendicular to the optical axis thereof, the optical positional relationship between the photographing optical lens 101 and the imaging surface of the image sensor 102 with respect to the subject is changed. .

[0004]The image sensor 102 that electronically captures the subject image formed through the photographic optical lens 101 is, for example, a high-sensitivity, high-speed operation type AMI (amplification type M
A solid-state imaging device consisting of an OS imager) is used. An image sensor driving circuit (not shown) drives the solid-state image sensor 102 at high speed over a predetermined period determined by the above-described photometry system, for example, in synchronization with a shutter release operation. Due to this high-speed drive, the solid-state image sensor 102 repeatedly captures a subject image at a predetermined operation cycle, and reads and outputs the subject image signal at high speed each time.

The subject image signal repeatedly read out at high speed from the solid-state image sensor 102 driven at high speed in this manner is amplified to a predetermined signal level via the amplifier 104 and then input to a video processor 105. This video processor 105 converts the subject image signal into a luminance signal Y, color difference signals (RY), and (B-Y), and outputs the signals. In this way, video processor 1
The luminance signal Y and the color difference signal (R-
Y) and (B-Y) are the A/D converters 106a and 106a, respectively.
It is digitally encoded via 106c and 106b.

[0006]The frame memory 107 used for detecting the deviation of the subject image stores the first frame of the subject image signal (luminance signal Y) in synchronization with the shutter release operation. The subject image signal of the first frame stored in this frame memory 107 is a reference image signal (
used as a reference subject image).

The two-dimensional correlation circuit is the frame memory 10
A two-dimensional correlation calculation is performed between the subject image signal of the first frame stored in 7 and each subject image signal captured from the second frame onwards, and the amount of deviation between those image signals (frame images) is calculated. These are detected as x displacement and y displacement, respectively. This two-dimensional correlation calculation is performed using various calculation algorithms that have been proposed in the past. This shift amount detection is performed each time the subject image signal is repeatedly read out from the solid-state image sensor 102 at high speed.

In this way, the two-dimensional correlation circuit 108
A series of information on the x-displacement and y-displacement of the subject image determined in is subjected to interpolation processing via interpolation circuits 109x and 109y, and is provided to actuator drive units 110x and 110y, respectively. And these actuator drive parts 1
10x and 110y, the x-direction actuator 1
03x and y direction actuators 103y are respectively driven, and the imaging optical lens 101
The displacement is driven in a direction that corrects the displacement in the direction and the y direction, thereby preventing camera shake.

[0009]

[Problems to be Solved by the Invention] In the conventional example, camera shake is corrected as described above, but since the photographic optical lens is generally made of glass and has a large mass, its inertia is also large, and the actuator is used to perform high speed correction. It is very difficult to drive with Furthermore, since an actuator and its drive circuit are used, it is difficult to make the camera smaller and lighter.

[0010] The camera system of the present invention was made with attention to such problems, and its purpose is to:
It is an object of the present invention to provide a compact and lightweight camera system by enabling camera shake correction without using a camera shake correction member such as an actuator.

[0011]

[Means for Solving the Problems] In order to achieve the above object, the camera system of the present invention includes a first image sensor for imaging subject light, and a first imaging element capable of imaging subject light and reading out at high speed. an image blur detector for detecting image blur from an image signal read out from the second image sensor; and filtering means for filtering the image signal read out from the first image sensor.

0012

That is, in the present invention, image blur is detected using an image pickup device capable of high-speed readout, and filtering is applied to the image signal in accordance with the detected image blur signal.

[0013]

[Example] First, the basic concept of the present invention will be explained.

In the present invention, a camera shake detector is provided within the camera body, and information about the camera shake is recorded on an image recording medium. When viewing an image on a monitor, etc., the original image is restored based on recorded camera shake information to provide an image free from camera shake. Generally, when there is camera shake, the recorded image f'(x) exposed on the recording medium can be expressed by the following equation 1, where f(x) is the original image.

[0015]

[Math 1]

Here, h(x) is a degraded signal due to camera shake, and the symbol * represents convolution. Note that for the sake of simplicity, the image is assumed to be a one-dimensional signal at position x. If Equation 1 is Fourier transformed and u is the spatial frequency, Equation 2 is obtained.

[0017]

[Math 2]

Therefore, the Fourier spectrum F(u
) to obtain the Fourier spectrum F′(u) of the recorded image
Since it is sufficient to divide by the Fourier spectrum of the degraded signal due to camera shake, the original image f(x) can be obtained by the following equation 3.

[0019]

[Math 3]

[0020] Therefore, by accurately detecting the camera shake information h(x) at the time of photographing, it is possible to recover an original image f(x) free from camera shake when viewing the image on a monitor or the like. Specifically, as will be described later, the process of Equation 3 can be performed using a filter as shown in FIG. An embodiment in which the present invention described above is applied to an electronic camera will be described below.

FIG. 1 is a block diagram of the electronic camera of this embodiment. 1 is a photographing optical lens; 2 is a solid-state image sensor such as a CCD that electronically captures a subject image formed by the photographing optical lens 1; the number of pixels is m×n; The photographing optical lens 1 is driven for focusing by, for example, a distance measuring system (not shown) in order to form a subject image on the imaging surface of the image sensor 2. Further, the aperture diaphragm mechanism incorporated in the photographing optical lens 1 is driven under the control of a photometry system (not shown) so that the exposure amount of the subject image by the solid-state image sensor 2 is made constant. The subject signal read out from the solid-state image sensor 2 is amplified to a predetermined level via a preamplifier 4, and then sent to a video processor 20 and an A/D converter 2.
1, it is converted into a digital video signal, and the data compressor 2
2, the data is compressed and stored on a recording medium 2 such as a memory card.
Recorded in 3. Further, the light flux from the subject image is guided to the camera shake detector 25 via the half mirror 24, and a camera shake signal is recorded on the recording medium 23. Filtering device 41
As described later, the subject signal and the camera shake signal are read out from the recording medium 23, and the subject signal is filtered according to the camera shake signal.

The above-mentioned camera shake detector 25 has a configuration as shown in FIG. 26 is a high-speed image sensor such as an AMI (amplified MOS imager) located on a plane equivalent to the image sensor 2, and an image sensor drive circuit (not shown) repeatedly images a subject image during the exposure period of the image sensor 2; Each time,
The subject signal is read out at high speed. Since it is only necessary to image a certain area of the image sensor 2, the number of pixels can be significantly reduced and readout can be performed at a very high speed. Further, this high-speed image sensor 26 outputs a signal corresponding to the brightness signal of the subject image. And this output is A/D
After being converted into a digital signal by the converter 27, it is written into the frame memory 28, and is also converted into a two-dimensional correlator 29.
is input to. The two-dimensional correlator 29 performs correlation calculations using various calculation algorithms that have been proposed in the past, and combines the signal stored in the frame memory 28 with the A/
The x displacement and y displacement with respect to the signal directly input from the D converter 27 are detected, and a motion vector is output.

Here, the frame memory 28 is connected to the image sensor 2.
The signal of the first frame of the object signal imaged by the high-speed image sensor 26 is written in synchronization with the exposure start signal of , and the motion vector V(i) (= (Vx (i), Vy (i)
, i=1 to N-1); Vx is the horizontal displacement, Vy is the vertical displacement, and i is the number of detections). Then, in the camera shake signal generator 30, a camera shake signal h(j) is obtained using the following equation 4.

[0024]

[Math 4]

[0025] Here, N is the number of times the high-speed image sensor picks up images of a subject during image sensor exposure. The relationship between V(i) and h(j) is shown in FIG. 6. This h(j) corresponds to the trajectory of camera shake.

FIG. 3 shows a reproducing device for images recorded on a recording medium, in which the read signal is decoded by a data decompressor 40 into an object signal when the image was taken, and a filter 41 converts it into an image free from camera shake. It is processed. And D
It is configured to be displayed on a monitor 44 via an /A converter 42 and a video processor 43. Further, the filter 41 is configured as shown in FIG. 35, 36
is a two-dimensional Fourier transformer (FT), 34 is a camera shake signal preprocessing circuit as described later, 31 is an inverse filter for the signal H(u) obtained by the two-dimensional Fourier transformer 36, and 1/
The arithmetic unit 32 of H(u), a multiplier 32, and a two-dimensional inverse Fourier transformer (inverse FT) 33 perform the operation shown in Equation 3 as a whole.

The operation of this embodiment under the following configuration will be explained with reference to FIG. When the shutter release is performed, an aperture diaphragm mechanism built into the photographic lens is operated by a photometry system (not shown) so that the exposure amount of the subject image is made constant. Further, focusing drive is performed by a distance measuring system (not shown).

At the same time that the exposure of the image sensor 2 starts, the exposure of the high-speed image sensor of the camera shake detector 25 also starts. Then, in synchronization with the exposure start signal, the first
The subject signal of the frame is written into the frame memory 28. Then, the motion vector V(i) and the camera shake signal h(j) with respect to the subject signal of the second frame and subsequent frames are obtained at the timing shown in FIG. N is the number of times the high-speed image sensor performs imaging during the exposure period of the image sensor 2. In this way, the camera shake signal h(j) (j=1 to N-1) during the exposure period of the image sensor 2 is detected.

On the other hand, the object signal imaged by the image sensor 2 is amplified to a predetermined level by the preamplifier 4, and then converted to a digital video signal via the video processor 20 and A/D converter 21, and then converted into data. encoded by a compressor,
It is recorded on the recording medium along with the camera shake signal.

During playback, the encoded object signal is read out from the recording medium and decoded into an object signal by the data decompressor 40, and is input to the filter 41 together with the camera shake signal read out at the same time. In the filter, the object signal f'(x) is transformed into a Fourier spectrum F'(u) by a two-dimensional Fourier transformer 35.
is converted to The camera shake signal h(x) is processed by the preprocessing circuit 34 as follows. First, as shown in FIG. 8, h(j) (in FIG. 8, j=1 Create an image corresponding to the trajectory of ~5). At this time, the brightness value L(j) of each h(j) is set to the following equation 5 for all j.

[0031]

[Math 5]

Here, h(j) is the vector h(j)
represents the length of This number 5 is calculated because each h
This indicates that the powers (sum of squares) of (j) are equal. Furthermore, the luminance values of pixels other than h(j) are set to zero. Furthermore, if the sizes of the images captured by the image sensor 2 and the high-speed image sensor 26 are different, the length of each h(j) is corrected so that the image is the same size as the image of the image sensor 2. After such preprocessing is performed in the preprocessing circuit 34, it is converted into a Fourier spectrum H(u) by a two-dimensional Fourier transformer 36. Then, H(u) is converted to 1/H(u) by the inverse filter calculator 31,
Multiplyed by F'(u) in the multiplier 32, F'(u)/H
(u) is obtained, and the two-dimensional inverse Fourier transformer 33 outputs an image with the camera shake recovered.

[0033] In this way, in the image reproducing device, by performing camera shake recovery based on the camera shake signal,
It is possible to provide an image free from camera shake without using a camera shake correction member such as an actuator inside the camera. Note that in this embodiment, image stabilization is performed during playback, but
Filtering device 41 for camera shake recovery as shown in FIG.
may be provided in an electronic camera, and may be configured to record on a recording medium after recovering from camera shake. In addition, in this embodiment, the object signal of the first frame of the high-speed image sensor is written in the frame memory, and the displacement with the signal of the second frame and subsequent frames is determined, but the signal written in the frame memory is updated every frame. However, if the camera is configured to always detect the displacement between two frames, the camera shake signal h(j) can be directly obtained. Further, in this embodiment, the filter is configured using a two-dimensional Fourier transformer, but it goes without saying that a generally well-known convolution filter may be used. Next, a second embodiment of the present invention will be described in which the present invention is applied to a silver halide camera with a lens shutter.

FIG. 9 shows a configuration diagram of the camera at the time of photographing. 5
0 is a camera body, 51 is an imaging film, and 52 is a camera shake signal writing section. The imaging film 51 has a subject exposure section 51a and a camera shake signal exposure section 51b. Here, the camera shake signal exposure section 51b is configured so as not to be exposed to subject light. The camera shake signal writing section 52 has a configuration as shown in FIG. In this figure, reference numeral 53 denotes a light emitting section which irradiates writing light onto the camera shake signal exposure section 51b and is configured to be rotatable about a shaft 100 and supported so that the irradiation position can be moved up and down. Reference numeral 55 denotes a fixing member having one end fixed to the camera body 50, and a support part 54 is supported at the other end so as to rotate around an axis 101, and moves the irradiation position of the writing light in the left-right direction. Rotate as much as possible.

Reference numeral 56 denotes a position fixing member for fixing the light emitting section, and is configured to expand and contract in the direction of the light emitting section 53. In other words, when fixing the light emitting part, the position fixing member 56
extends and contacts the light emitting section 53, and is fixed so that the irradiation position of the writing light is at the center of the camera shake signal exposure section 51b. Then, during exposure, the position fixing member 56 is retracted, and the light emitting section and the support section are in a state where they can rotate. And the light emitting part 5
3, as shown in FIG. 11, is composed of a gyro 57, a light emitting diode 58, a lens 59 for converting the light beam diverged from the light emitting diode 58 into parallel light, and a power supply section 60. Its direction is not changed. In other words, even if the camera body section 50 moves due to camera shake, the direction of the light emitting section 53 does not change. At this time, since the camera shake signal exposure section 51b moves together with the camera body section 50, the irradiation position of the writing light changes due to the movement due to the camera shake, so that camera shake information is exposed to the camera shake signal exposure section.

[0036] Furthermore, the camera shake image recovery processing device is shown in FIG.
It looks like this. 61 is a white point light source such as a xenon lamp, and the lens 62 converts the light into parallel light. At this time, the xenon lamp 61 and the lens 62 are separated by the focal length f of the lens 62.

Here, since a point light source is used, spatial coherence is maintained, and optical spatial filtering can be performed using the lenses 63 and 64. Note that the lenses 63 and 64 each have a focal length of f and are located 2f apart. Reference numeral 65 denotes an object plane located at a distance f from the lens 63, on which a film that has already been photographed is placed. 66
is an imaging plane located at a distance f from the lens 64, on which an unexposed film is placed. 67 is the object plane 65
A monochrome liquid crystal controlled by a driver 77 is placed on the Fourier plane, and desired filtering is performed by controlling the amount of transmitted light. That is, the image f'(x) on the object plane is filtered by multiplying its Fourier spectrum F'(u) by the transmission distribution H(u) of the liquid crystal. Reference numeral 68 denotes a mirror that receives light from the camera shake signal exposure section 51b, and is positioned so that the distance between the lens 69 and the object plane 65 is the focal length f' of the lens 69. A two-dimensional sensor 70, such as a CCD, is located at a distance f' from the lens 69, and is in charge of the Fourier plane of the camera shake signal exposure section 51b. And 2
The signal photoelectrically converted by the dimensional sensor 70 is sent to the preamplifier 71.
The signal is amplified by the A/D converter 72, converted into digital data, and written to the frame memory 73. Reference numeral 68 denotes a driver 77 for the liquid crystal 67, which displays the data signal taken into the frame memory on the liquid crystal. At this time, when the signal value is zero, the density of the liquid crystal is increased to block light, and as the signal value becomes higher, the density is lowered to increase the amount of transmitted light.

A rotary plate 74 has R, G, and B color filters, and is driven by a stepping monitor 75. A controller 76 controls the stepping motor 75 and the liquid crystal driver 68. The driver 77 also has a function of performing appropriate arithmetic processing on the signals read from the frame memory 73. Furthermore, when white light is irradiated onto the object surface, a spectrum with different magnifications appears for each wavelength on the Fourier plane 67, but if the transmittance is controlled using a monochrome liquid crystal filter, different filtering will be performed for each wavelength. Become.

Therefore, a color filter is used to change the wavelength to R.
, G, and B, and filtering is performed separately for R, G, and B. The operation of this embodiment under the above configuration will be explained. First, the time of exposure will be explained. Before the shutter release starts, the position fixing member 56 extends and fixes the light emitting section 53. The gyro 57 is stationary and the light emitting diode 58 is not lit. At the same time as the shutter release starts, the gyro 57 first starts to drive. Then, the photographing lens is driven by a distance measuring system (not shown) to perform focus adjustment, and the aperture value and shutter speed of the photographing lens are set by a photometry system (not shown). Then, the position fixing member 56 contracts, the light emitting diode lights up, and the shutter (not shown) opens to start exposure.

During the exposure period, the object light is exposed to the object exposure section 51a, and the camera shake signal is exposed to the camera shake signal writing section 51b. When the light is exposed for the set shutter speed time, the shutter is closed, the light emitting diode is turned off, the gyro is stopped, and the position fixing member 56 is extended to fix the light emitting part 53.

Next, the camera shake recovery process will be explained. Initially, the liquid crystal 67 is at the highest concentration and light is blocked. Then, by the stepping motor, R
filter is selected and irradiates the object surface. The light passing through the camera shake signal exposure section 51b is Fourier transformed by the lens 69, and the power spectrum of camera shake |H(u)|2
is imaged on a two-dimensional sensor 70, photoelectrically converted, amplified by a preamplifier 71, digitized by an A/D converter 72, and taken into a frame memory 73. Then, the spectrum of the camera shake signal is displayed on the liquid crystal display 67 by the driver 68, but at this time, H'(u
) is converted and displayed.

[0042]

[Math 6]

Then, the image f'(
x) is Fourier-transformed by a lens 63, multiplied by H'(u) on the Fourier plane, and inversely Fourier-transformed by a lens 64, so that the image f(x) with camera shake recovered is transferred to a film placed on an imaging plane 66. exposed to light. After a predetermined period of time, the liquid crystal becomes the highest concentration again, light is blocked, the stepping motor 74 is driven, the G filter is selected, and the same process as above is performed. In this way, the film on the imaging plane 66 is exposed separately for R, G, and B, and an image in which camera shake has been recovered is obtained.

[0044] As described above, even for images taken by a silver halide camera with a lens shutter, a camera shake signal is recorded at the time of exposure, and an image free from camera shake can be recovered later based on this camera shake signal.

In this example, R, G, and B were processed separately using a rotary plate having a color filter, but by using a color liquid crystal and configuring a color filter, processing can be performed in one time. be able to. Further, when the image recorded in the frame memory 73 is displayed on the liquid crystal 67 by the liquid crystal driver 68, appropriate enlargement/reduction processing may be performed. This is to correct the difference in the magnitude of the camera shake signal written by the camera shake signal writing section 52 from the actual size, and the difference in the spectrum of the camera shake signal displayed on the liquid crystal 67 from the actual size.

Furthermore, the camera shake signal writing section may have a structure as shown in FIG. In this figure, 82 is a light emitting section composed of a light emitting diode, etc., and 78 is a reflecting member made of iron including a mirror for guiding the light flux from the light emitting section 77 to the camera shake signal exposure section 51b. Support member 80
and is supported by the camera body section 50.

When the exposure time is short, the direction of the reflecting member 78 does not change even if the camera body is displaced due to camera shake, and the same effect as the above-mentioned gyro can be obtained and the structure is simple. Note that 81 is the aforementioned fixing member 56.
The electromagnet serves as a fixing member corresponding to the electromagnet, and is movable in the vertical direction. When fixed, it acts as an electromagnet at the position shown by the solid line in FIG. 13(b), attracting and fixing the reflecting member made of iron. When camera shake is detected, it moves to the position indicated by the dotted line in FIG. 13(b), and at this time it does not function as an electromagnet.

In this embodiment, the image deteriorated due to camera shake is subjected to recovery processing and exposed to a new film, but a two-dimensional sensor may be placed on the imaging plane, and the image may be photoelectrically converted and displayed on a monitor. However, an image degraded by camera shake may be input using a film image input device or the like, and an image with the camera shake recovered may be obtained by digital processing similar to the previous embodiment. Furthermore, although a holding member for the film placed on the object plane 65 and the imaging plane 66 is not shown in this embodiment, for example, by using a holding member that moves each frame of the film in synchronization, It is possible to process many images at high speed, and it can also be used to recover from camera shake in video tapes, etc.

[0049]

[Effects of the Invention] As described above, in the present invention, a detection unit for detecting camera shake is provided, and filtering processing for recovering camera shake is performed in accordance with the camera shake signal detected by the detection unit after the exposure of the subject signal is completed. Therefore, during subject exposure,
An actuator for driving a photographing lens or an image sensor is not required, and a compact and lightweight camera system with an anti-shake function can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a first embodiment in which the present invention is applied to an electronic camera.

FIG. 2 is a diagram showing the configuration of the camera shake detector shown in FIG. 1.

FIG. 3 is a diagram showing the configuration of a regenerator.

FIG. 4 is a diagram showing the configuration of a filter.

FIG. 5 is a configuration diagram when a filter is applied to an electronic camera.

FIG. 6 is a diagram showing the relationship between motion vector V(i) and camera shake signal h(j).

FIG. 7 is a diagram for explaining the operation of the present invention.

FIG. 8 is a diagram illustrating the creation of an image corresponding to the trajectory of a camera shake signal h(j) with the center of an m×n pixel image as the origin.

FIG. 9 is a diagram showing the configuration of an electronic camera at the time of photographing.

FIG. 10 is a configuration diagram of a camera shake signal writing section.

FIG. 11 is a diagram showing the configuration of a light emitting section.

FIG. 12 is a diagram showing the configuration of a camera shake image recovery processing device.

FIGS. 13(a) and 13(b) are diagrams showing other configurations of the camera shake signal writing section.

FIG. 14 is a diagram showing the configuration of a conventional camera system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Photographing optical lens, 2...Imaging element, 20...Video processor, 22...Data compressor, 23...Recording medium, 25...
Shake detector. 41...Filtering device.

Claims (6)

[Claims] Claim 1: A first image sensor for capturing an image of subject light, and a second image sensor capable of capturing an image of subject light and reading out at high speed.
an image sensor for detecting image blur from an image signal read from the second image sensor; and an image blur detector for detecting image blur from an image signal read from the second image sensor; A camera system comprising: filtering means for filtering an image signal read out from an image sensor. 2. A recording medium for recording an image signal from the first image sensor and an image blur signal from the image blur detector; 2. The camera system according to claim 1, wherein the filtering means filters the image signal of the first image sensor read from the recording medium accordingly. 3. The image blur detector includes a storage section that stores one of the image signals read out from the second image sensor during the exposure period of the first image sensor, and a storage section that stores one of the image signals read out from the second image sensor during the exposure period of the first image sensor; A displacement amount detector for detecting the amount of displacement between the stored image signal and the image signal read from the second image sensor, and an image blur based on the amount of displacement output from the displacement amount detector. 3. The camera system according to claim 1, further comprising an image blur signal generator that generates a signal. 4. The filtering means includes the first
Claims 1 and 2 further comprising means for dividing the Fourier spectrum of the image signal read out from the image sensor by the Fourier spectrum of the image blur signal.
The camera system described in any of the above. 5. A first imaging unit for capturing an image of subject light, a displacement writing unit for writing a displacement corresponding to the movement of the camera body, and a second imaging unit to which a signal is written by the displacement writing unit. A camera system comprising: an imaging section; and filtering means for filtering an image recorded on the first imaging section according to a signal recorded on the second imaging section. 6. The filtering means includes a light source;
A Fourier transform lens for generating the Fourier spectrum of the image stored in the first imaging section, a spatial modulation element placed on the Fourier plane of the Fourier transform lens, and a signal recorded in the second imaging section. 6. The camera system according to claim 5, further comprising driving means for driving the spatial modulation element accordingly.