JPH11252445A - Image-pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct a hand shake generated in photographing still images by the electronic shutter of a low speed and to prevent the generation of smears. SOLUTION: A data processing/system controller 31 is provided with a memory 31a for hand shake correction capable of storing the prescribed number of video signals for respective fields. The data processing/system controller 31 supplies the video signals for the respective fields supplied from a camera block 20 to a motion detection circuit 35, stores the video signals in the memory 31a for the hand shake correction and corrects the hand shake of the video signals stored in the memory 31a for the hand shake correction based on a motion vector detected in the motion detection circuit 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an imaging apparatus suitable for taking a still image with a low-speed shutter.

[0002]

2. Description of the Related Art Today, electronic still cameras using a CCD image sensor are provided. The CCD image sensor has an electronic shutter function that can freely set a shutter speed. Therefore, the user can shorten or lengthen the shutter time according to the movement of the subject or the state of the illumination.

[0003]

For example, when photographing a still image of a dark subject with little illumination, the user sets the speed of the electronic shutter to be slow to increase the exposure. However, when the shutter speed is low, the influence of camera shake is likely to occur, and as a result, the image of the subject is blurred. For example, as shown in FIG. 6, if a camera shake occurs when a subject having the character "A" is being photographed, the character "A" becomes blurred as shown in FIG.

When a dark image of a bright subject such as an electric lamp is exposed for a long time to capture a still image, electric charges overflow from a photodiode of the CCD image sensor corresponding to the bright object, and the image is displayed. There is also a problem that a bright band (smear) occurs in the image.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is an object of the present invention to correct camera shake caused when a still image is shot with a low-speed electronic shutter and to prevent occurrence of smear. It is an object of the present invention to provide an imaging device capable of performing the following.

[0006]

In order to solve the above-mentioned problems, an image pickup apparatus according to the present invention outputs a video signal composed of a plurality of temporally continuous images by continuously releasing an electronic shutter. A solid-state image sensor, a motion vector detecting unit that detects a motion vector for a previous image temporally with respect to each of the plurality of images, and an image including a plurality of images output from the solid-state image sensor A storage unit for storing a signal; and a correction unit for correcting a shift of each image stored in the storage unit based on each motion vector detected by the motion vector detection unit and performing a superimposition process of each image. .

[0007] The image pickup apparatus performs the superposition processing of the video signals based on the motion vectors of the video signals that are temporally continuous, and corrects and outputs the deviation of each video signal.

Further, the image pickup apparatus according to the present invention includes a solid-state image pickup device for outputting a video signal composed of a plurality of temporally continuous images by continuously releasing an electronic shutter, and a plurality of images, respectively. A motion vector detecting means for detecting a motion vector corresponding to the immediately preceding picture, a video signal composed of a plurality of pictures output from the solid-state imaging device, and a motion vector detected by the motion vector detecting means. Recording / reproducing means for recording the video signal and the motion vector recorded on the recording medium, recording the video signal reproduced by the recording / reproducing means, and recording / reproducing means And a correcting unit for correcting a shift of each video stored in the storage unit based on each motion vector reproduced in the step (a) and performing a superimposition process of each video.

In the above-mentioned image pickup apparatus, a temporally continuous video signal and a motion vector are read from the recording / reproducing means, and the video signals are superimposed on the basis of the motion vector. Is corrected and output.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, first and second embodiments of the present invention will be described in detail with reference to the drawings. The present invention is applied to, for example, a video camera device 1 having the configuration shown in FIG.

The video camera device 1 includes a camera block 20 for generating a video signal based on the imaging light incident through the optical system 1, a video signal processing unit 30 for performing a compression process or the like on the video signal, A media drive unit 40 for converting audio signals into a predetermined format; a deck unit 50 for recording data on the optical disk 100 or reading data recorded on the optical disk 100;
It includes a video / audio input / output unit 60 and a power supply block 80 for supplying power to each circuit.

The optical system 1 includes an imaging lens 11 for condensing imaging light from a subject, and a focus motor 12 for driving the imaging lens 11 in a focusing direction to perform a focusing operation.

The camera block 20 includes a CCD (Charge Coupled Device) image sensor 2 for generating a video signal.
1 and sample hold /
The circuit includes an AGC (Auto Gain Control) circuit 22, a video A / D converter 23 for digitizing a video signal, a timing generator 24 for supplying a timing signal to each circuit, and a camera controller 25 for controlling each circuit.

The CCD image sensor 21 generates a video signal based on imaging light incident through the imaging lens 11 and supplies the video signal to a sample hold / AGC circuit 22.
The shutter speed of the CCD image sensor 21 is high.

The sample / hold / AGC circuit 22 controls the video signal so as to have a predetermined gain, and further performs waveform shaping and reset noise removal by correlated double sampling processing to provide the video A / D converter 23 with the signal. Supply. The video A / D converter 23 digitizes the video signal at a predetermined sampling interval and supplies the video signal to the video signal processing unit 30.

Here, the drive timing and sampling interval of the CCD image sensor 21, the sample hold / AGC circuit 22, and the video A / D converter 23 are controlled by a timing signal generated by a timing generator 24.

The camera controller 25 controls the above circuits to operate properly and also controls the lens block 10 to perform an autofocus function, an automatic exposure adjustment function, and a zoom function. The camera controller 25 adjusts the rotation angle of the focus motor 12 based on, for example, predetermined autofocus information, and outputs the imaging light to be in the just focus.
The light is incident on the D image sensor 21.

The video signal processing unit 30 includes a data processing / system controller 31 for controlling input / output signals and the like,
MPEG video signal processing circuit 33 for performing compression / expansion processing of a video signal, and motion detection circuit 3 for detecting a motion vector
5, an audio compression encoder / decoder 37 for compressing / expanding audio signals, and a video controller 38 for controlling each circuit to operate properly.

When recording, the video signal processing section 30 performs compression processing on the video signal supplied from the camera block 20 and the audio signal supplied from the display / video / audio input / output section 60 to perform media processing. It is supplied to the drive unit 40.

More specifically, the data processing / system controller 31 controls the compression / expansion processing of the video signal and the audio signal, and controls the input / output signals of the video signal processing unit 30. For example, the video signal from the camera block 20 is supplied to the MPEG video signal processing circuit 33 and the motion detection circuit 35.

The motion detection circuit 35 detects a motion vector using the memory 36 as a work area. The motion detection circuit 35 divides the supplied video signal into predetermined block units, and detects a motion vector indicating a change in vertical and horizontal motion of each field for each block by the number of dots. This is the MPEG video signal processing circuit 3
Supply 3 Of the motion vectors detected here,
In particular, those having a large light amount (high luminance) are used for detecting the speed of a club head described later.

The MPEG video signal processing circuit 33 uses the memory 34 as a work area, performs orthogonal transformation processing, quantization processing, and the like on the video signal, and further performs motion compensation using the motion vector to support the MPEG2 format. Compression processing of the video signal to be performed. Note that the MPEG video signal processing circuit 33 may perform video signal compression processing corresponding to the JPEG format at the time of shooting a still image, or may use an I picture in the MPEG2 format as a still image. MPEG video signal processing circuit 33
Supplies the compressed video signal to the MPEG video signal processing circuit 33.

The audio compression encoder / decoder 37
Converts an audio signal supplied via the microphone 101 and the display / video / audio input / output unit 60 into an ATRAC (Adaptive
Transform Acoustic Codin
g) Compress according to the two formats, and supply the compressed audio signal to the data processing / system controller 31. Here, in the ATRAC2 format, the time axis waveform of the digital signal at predetermined time intervals is analyzed into frequency components by Fourier transform, and the minimum audible characteristics and the masking effect are used on the frequency axis to obtain the frequency components that are important for hearing. , A process of extracting the information in order from a predetermined amount is performed.

Data processing / system controller 31
Stores the compressed video signal and audio signal in the temporary memory 32, reads out the video signal and the like from the memory 32 according to a predetermined transfer rate, and supplies it to the media drive unit 40.

On the other hand, the video controller 38 controls each circuit in the video signal processing section 30 and performs predetermined arithmetic processing. The video controller 38 performs, for example, camera shake correction of a video signal based on a motion vector detected by the motion detection circuit 35. The video controller 38 may also receive, for example, a command from an external computer via the external interface 72 and the interface terminal 73.

On the other hand, in the case of reproduction, the video signal processing section 30 performs expansion processing on the signal supplied from the media drive section 40 and displays the expanded and restored video signal and audio signal. It is supplied to the input / output unit 60.

More specifically, the data processing / system controller 31 supplies the compressed video signal supplied from the media drive unit 40 to the MPEG video signal processing circuit 33 and converts the compressed audio signal into an audio signal. It is supplied to the encoder / decoder 37. The MPEG video signal processing circuit 33 expands the compressed video signal and supplies it to the display / video / audio input / output unit 60 via the data processing / system controller 31. The audio compression encoder / decoder 37 expands the compressed audio signal and supplies it to the display / video / audio input / output unit 60.

The media drive section 40 includes a first encoder / decoder 41 for processing the video signal and the audio signal compressed by the video signal processing section 30 so as to correspond to the first format, and an RF signal and a focus error signal. An RF amplifier 43 for generating an RF signal, a binarization circuit 44 for performing a binarization process on an RF signal, and a second encoder / decoder / servo circuit 45 for processing an audio signal so as to correspond to a second format. And a driver controller 46 for controlling each circuit in the media drive unit 40.

At the time of recording, the first encoder / decoder 41 encodes the compressed video signal and the compressed audio signal supplied from the video signal processing unit 30 in accordance with the first format, and temporarily encodes them. The data is stored in the memory 42 and read out according to a predetermined transfer rate.
To supply. The details of the first format will be described later. Further, the second encoder / decoder / servo circuit 45 encodes the audio signal supplied via the HP / LINE terminal 103 and the display / video / audio input / output unit 60 so as to correspond to the second format. And supplies it to the deck unit 50.

At the time of reproduction, the RF amplifier 43 outputs a signal based on the detection output of the laser beam from the deck section 50.
An RF signal, a focus error signal, and a tracking error signal are generated, the RF signal is supplied to a binarization circuit 44, and the focus error signal and the tracking error signal are converted to a second signal.
To the encoder / decoder / servo circuit 45 of FIG.
The binarization circuit 44 performs a binarization process on the RF signal,
This is supplied to the first encoder / decoder 41. The first encoder / decoder 41 performs a decoding process corresponding to the first format on the video signal and the audio signal from the binarization circuit 44 and supplies the video signal and the audio signal to the video signal processing unit 30. On the other hand, the second encoder / decoder servo circuit 4
Reference numeral 5 controls focusing and tracking of the optical head 51 described later based on the focus error signal and the tracking error signal. Note that the second encoder / decoder / servo circuit 45 sends the second
When the audio signal corresponding to the format is read out, it is decoded and supplied to the display / video / audio input / output unit 60.

The deck section 50 includes an optical head 51 for recording / reproducing data on / from the optical disk 100 and an optical disk 1
And a sled motor 5 for moving the optical head 51 to a predetermined position.
3 and a magnetic head 54 for applying a predetermined magnetic field to the optical disc 100 during data recording.

The optical head 51 outputs a high-level laser beam for heating a recording track of the optical disk 100 to the Curie temperature during recording, and outputs a low-level laser beam for detecting reflected light of the optical disk 100 by the magnetic Kerr effect during reproduction. Is output. Further, a magnetic head 54 is disposed at a position opposing the optical head 51 with the optical disc 100 interposed therebetween. The magnetic head 54 applies a magnetic field modulated according to data to be recorded at the time of recording to the optical disc 100.

The optical head 51 and the magnetic head 54
Can be moved in a direction perpendicular to the recording track by a thread mechanism (not shown).
It is arranged at a predetermined position by the rotation of No. 3.

Here, data from the first encoder / decoder 41 or the second encoder / decoder / servo circuit 45 is recorded on the optical disc 100 in different formats. The first format is
This is for performing high-density recording suitable for recording a video signal and an audio signal, and the second format relates to recording of an audio signal that has been conventionally performed.

As shown in FIG. 2, a wobbled groove WG provided with wobbles (meandering) is provided on the data recording surface of the optical disc 100 corresponding to the first format.
And a non-wobbled groove NWG to which no wobble is given, is formed in advance. The wobbled groove WG and the non-wobbled groove NWG are formed in a double spiral shape with the land Ld interposed therebetween.

FIG. 3 is an enlarged view of a portion surrounded by a broken line A in FIG. FIG. 3A is a cross-sectional view of the optical disc 100, and FIG. 3B is a plan view of the data recording surface side of the optical disc 100.

The track TrA is a track in which the wobbled groove WG is located on the outer peripheral side of the disk and the non-wobbled groove NWG is located on the inner peripheral side of the disk.
On the other hand, the track Tr · B is a track in which the wobbled groove WG is located on the inner peripheral side of the disk and the non-wobbled groove NWG is located on the outer peripheral side of the disk.
In other words, the wobble is formed only on one side of the track Tr / A on the outer circumference side of the disk, and the wobble is formed on the track Tr / B only on one side of the inner circumference side of the disk.

In this case, the track pitch is the distance between the centers of the tracks Tr.A and Tr.B adjacent to each other, and the track pitch is 0.95 μm as shown in FIG.

Here, the wobbled groove WG is one in which the physical address on the disk is formed based on a signal encoded by FM modulation + biphase modulation. Therefore, at the time of recording / reproduction, the physical information on the disk is extracted by demodulating the reproduction information obtained from the wobbling given to the wobbled groove WG.

The address information as the wobbled groove WG is shared by the tracks Tr.A and Tr.B. That is, the track Tr · A located on the inner periphery of the wobbled groove WG and the track Tr · B located on the outer periphery share address information by wobbling given to the wobbled groove WG. Such an addressing method is called an interlace addressing method. By adopting this interlace addressing method, for example, it is possible to reduce the track pitch while suppressing crosstalk between adjacent wobbles. Also, a method of recording an address by forming a wobble in a groove is referred to as ADIP (Address In Pregroov).
e) Method.

Next, which of the tracks Tr.A and Tr.B sharing the same address information is being traced is identified as follows.

Here, a three-beam system is used. For example, when the main beam traces a track (land Ld), the remaining two side beams trace grooves located on both sides of the land Ld.

FIG. 3B shows the main beam spot S
This shows a state where Pm is tracing the track Tr · A. In this case, two side beam spots SPs
1 and SPs2, the inner side beam spot S
Ps1 traces the non-wobbled groove NWG,
The outer side beam spot SPs2 traces the wobbled groove WG.

On the other hand, although not shown, when the main beam spot SPm is tracing the tracks Tr and B, the side beam spot SPs1 traces the wobbled groove WG, and the side beam spot SPs2 is non-traceable. The wobbled groove NWG will be traced.

As described above, the main beam spot SPm
Traces the track TrA or tracks TrB
Is traced, the side beam spots SPs1, Ss
The groove traced by Ps2 is switched to wobbled groove WG or non-wobbled groove NWG.

Side beam spots SPs1, SPs2
The detection signal obtained by the reflection has a different waveform depending on which of the wobbled groove WG and the non-wobbled groove NWG is being traced. Therefore,
Based on the waveform of the detection signal, it can be determined whether any of the side beam spots SPs1 and SPs2 is currently tracing the wobbled groove WG (or the non-wobbled groove NWG). As a result,
It is possible to identify which of the tracks Tr.A and Tr.B the main beam traces.

FIG. 4 is a diagram showing the main specifications of the first format having the above-described track structure in comparison with the second format.

First, in the second format, the track pitch is 1.6 μm and the bit length is 0.59 μm / bit. The laser wavelength λ is 780 nm, and the aperture ratio NA of the optical head is 0.45. The recording method employs a groove recording method. That is, at the time of recording / reproduction, the groove is used as a track. The address method is a method of forming a groove (track) by a single spiral and using a wobbled groove in which wobbles as address information are formed on both sides of the groove. The modulation method of the recording data is EFM (8-
14 conversion). The error correction method is ACIRC (Advanced Cross In).
Terreave Reed-Solomon Cod
e) is adopted, and a convolution type is adopted for data interleaving. Therefore, the data redundancy is 4
6.3%. The disk drive method is CLV (Cons
Tant Linear Velocity) is adopted, and the linear velocity is 1.2 m / s. The standard data rate during recording / reproduction is 133 kB / s, and the recording capacity is 140 MB.

On the other hand, the first format has a track pitch of 0.95 μm and a bit length of 0.39 μm
/ Bit, both of which are shorter than the second format. Then, in order to realize the above-mentioned bit length, the laser wavelength λ = 650 nm and the aperture ratio NA of the optical head =
At 0.52, the beam spot diameter at the in-focus position is reduced, and the band as an optical system is expanded. As described above, the land recording method is adopted as the recording method, and the interlace addressing method is used as the address method. The modulation method of the recording data is R
LL (1, 7) system (RLL; Run Length)
Limited) and the error correction method is RS-PC
The method and data interleave are block complete types. Then, as a result of adopting each of the above methods, data redundancy is suppressed to 19.7%. The disk drive system adopts CLV, its linear velocity is 2.0 m / s,
The standard data rate for recording / reproducing is 589 kB / s. The recording capacity is 650 MB, and high-density recording that is slightly more than four times as high as that of the second format is possible.

For example, when recording a moving image according to the first format, the moving image
When the compression encoding by G2 is performed, it is possible to record a moving image of 15 minutes to 17 minutes in time, depending on the bit rate of the encoded data. When only audio signal data is recorded, if audio data is subjected to compression processing by ATRAC2, recording can be performed for about 10 hours.

On the other hand, the display / video / audio input / output unit 60
A video D / A converter 61 for converting a video signal from the video signal processing unit 30 into an analog signal; a display controller 62 for controlling display of the LCD 102; a composite signal processing circuit 63 for outputting a composite signal;
An A / D converter 64 for digitizing the audio signal input at 1 and an A / D converter for converting the audio signal decoded by the second encoder / decoder / servo circuit 45 into an analog signal.
And a D / D / A converter 65.

Since the video signal supplied from the data processing / system controller 31 is a component signal composed of a luminance signal Y and a color difference signal C, the video D / A converter 61 digitizes these signals and displays them in the display controller. 62 and a composite signal processing circuit 63. The display controller 62 causes the LCD 102 to display an image based on the luminance signal Y and the color difference signal C. The composite signal processing circuit 63
Outputs a composite signal from the luminance signal Y and the color difference signal C, that is, a video signal obtained by synthesizing the composite signal and the
Output via the line 05. On the other hand, the A / D converter 64
Digitizes the audio signal from the microphone 101 and supplies it to the audio compression encoder / decoder 37. Also, A
The / D-D / A converter 65 is used for recording data at the HP / LI
The audio signal supplied via the NE terminal 103 is digitized to form a second encoder / decoder / servo circuit 45.
During reproduction, the audio signal from the second encoder / decoder / servo circuit 45 is converted into an analog signal and supplied to the speaker 104 and the HP / LINE terminal 103.

Next, the video camera apparatus 1 having such a configuration is described.
For example, a case where a still image of a dark subject with a small amount of illumination is photographed will be described with reference to FIG.

When shooting of a still image of a subject is started, the CCD image sensor 21 of the camera block 20 generates a video signal having a short shutter time, and supplies the video signal to the video signal processing unit 30 via the camera block 20. The CCD image sensor 21 outputs a video signal of 30 frames per second in the case of shooting a moving image. However, in the case of reproduction, the image signal varies depending on the illumination state of the subject and the setting of the electronic shutter. Shall be output.

The video signal processing section 30 corrects the camera shake of the video signal supplied from the camera block 20. Specifically, the data processing / system controller 31 includes a camera shake correction memory 31a capable of storing a predetermined number of video signals for each field. The data processing / system controller 31 supplies the video signal for each field supplied from the camera block 20 to the motion detection circuit 35, and stores the video signal in the camera shake correction memory 31a. The camera shake correction of the video signal stored in the camera shake correction memory 31a is performed based on the motion vector to be performed.

When three images of the character "A" are supplied for each field, for example, as shown in FIGS. 5A to 5C, the motion detection circuit 35 A motion vector in the upper right direction is detected as the motion vector of FIG. 5B, and a motion vector in the upper left direction is detected as the motion vector of FIG. 5C with respect to FIG. 5B.

Data processing / system controller 31
Is the same size as the motion vector shown in FIG. 5 (b) and moves the image shown in FIG. 5 (b) in the opposite direction,
The image in FIG. 5A and the image in FIG. 5B are superimposed on the camera shake correction memory 31a. Thereby, it is possible to correct the blur of the character "A" generated between the fields and generate a good video signal. Similarly, the data processing / system controller 31 moves the image shown in FIG. 5C in the direction opposite to that of the motion vector shown in FIG. The video in FIG. 5B and the video in FIG. 5C are superimposed. The data processing / system controller 31 performs such processing on the camera shake correction memory 31a to correct and superimpose the image blur shown in FIG. 5A to FIG. It is possible to generate a video signal composed of the character "A" without blur as shown in (d). Then, the video signal subjected to the camera shake correction is compressed by the MPEG video signal processing circuit 33, and is recorded on the optical disk 100 in the deck unit 50 via the media drive unit 40.

As described above, the video camera device 1
During recording, image blur correction for each field is performed based on the motion vector, and a superimposition process of these video signals is performed to generate a good video signal without blur. Can be recorded.

Further, since each image to be superimposed is generated at a shutter speed of 1/30 second or less, smear does not occur even if there is a bright object among dark subjects as a whole. Therefore, even if the shutter speed is reduced in order to increase the exposure, smear does not occur in the superimposed video, so that a good still image without smear can be taken.

In the above description, the data processing / system controller 31 corrects and blurs three images and superimposes them, but the present invention is not limited to this.

For example, the data processing / system controller 31 may perform the above-described superimposition processing of the blur-corrected video signal until the superimposed video signal reaches a predetermined signal level.

Specifically, the CCD image sensor 21
Outputs a video signal for each frame, not limited to three frames, and supplies the video signal to the data processing / system controller 31 via the sample hold / AGC circuit 22 and the like. The data processing / system controller 31 determines whether the signal level of the video signal stored in the camera shake correction memory 31a has reached a predetermined level each time the one-frame video signal is subjected to the camera shake correction and the superimposition process is performed. I do. Then, the data processing / system controller 31 continues the superposition processing when the signal level of the video signal has not reached the predetermined level, and ends the processing when the signal level has reached the predetermined level. Thus, a still image can be taken under a constant exposure condition automatically according to the state of illumination of the subject.

The user may operate the operation unit 71 to set the number of frames to be superimposed in advance. Thus, the subject can be photographed in the exposure state desired by the user.

Next, a second embodiment of the present invention will be described. The video camera device 1 according to the second embodiment records a video signal as it is on an optical disc 100, and reads out the video signal recorded on the optical disc 100 before performing camera shake correction.

When shooting of a still image is started, data processing /
The system controller 31 supplies the video signal for each field supplied from the camera block 20 to the MPEG video signal processing circuit 33 and the motion detection circuit 35. The data processing / system controller 31 supplies the video signal compressed by the MPEG video signal processing circuit 33 and the motion vector detected by the motion detection circuit 35 to the deck unit 50 via the media drive unit 40. Therefore, the optical disc 100 includes not only a compressed video signal,
Motion vectors are also recorded.

On the other hand, at the time of reproduction, the optical disk 100
The compressed video signal and the motion vector recorded in the DVD are read out by the deck unit 50 and supplied to the video signal processing unit 30 via the media drive unit 40.

In the video signal processing section 30, the data processing / system controller 31 supplies the compressed video signal supplied from the media drive section 40 to the MPEG video signal processing circuit 33. The MPEG video signal processing circuit 33 expands the compressed video signal so as to become the original signal, and supplies this to the data processing / system controller 31.

Data processing / system controller 31
Stores the expanded video signal in the camera shake correction memory 31a, performs the blur correction of the video signal based on the motion vector supplied from the media drive unit 40, and performs the overlay processing. The process of superimposing the video signals is the same process as described with reference to FIG.

Data processing / system controller 31
Supplies the video signal subjected to camera shake correction to the display / video / audio input / output unit 60. Then, a good image signal without camera shake correction is output to the outside via the external terminal 105, and an image of the object without shake is displayed on the LCD 102.

As described above, the video camera device 1
During reproduction, a video signal is corrected for camera shake in each field based on a motion vector, and a superimposition process of these video signals is performed, so that a good video signal without blur can be generated.

Further, since each image to be superimposed is generated at a shutter speed of 1/30 second or less, no smear occurs even if there is a bright object among the dark objects as a whole. Therefore, even if the shutter speed is reduced in order to increase the exposure, smear does not occur in the superimposed video, so that a good still image without smear can be taken.

Further, as in the first embodiment, the data processing / system controller 31 may superimpose the video signal until a predetermined signal level is reached, or the data processing / system controller 31 may execute the superimposition processing with a predetermined number of frames. It goes without saying that the refilling process may be performed.

In the above description, the video camera apparatus 1 has recorded a still image on the optical disc 100.
Not only a still image but also a moving image may be recorded on the optical disc 100. Then, at the time of reproduction, the video camera device 1 may read out a motion vector together with a video signal of several fields from the optical disc 100, and perform the camera shake correction of the video signal based on the motion vector.

[0074]

As described in detail above, according to the imaging apparatus of the present invention, a motion vector for a temporally previous video is detected for each of a plurality of videos, and By correcting the shift of each image stored in the storage means based on each motion vector and performing the overlapping process of each image, it is possible to correct the camera shake occurring in the image signal and to prevent the occurrence of smear. A good video signal can be obtained.

Further, according to the imaging apparatus of the present invention, the video signal and the motion vector recorded on the recording medium are reproduced, and the displacement of each video stored in the storage means is corrected based on each of the motion vectors. Then, by performing the superimposition processing of the respective images, it is possible to obtain a good image signal without camera shake.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a specific configuration of a video camera device to which the present invention has been applied.

FIG. 2 is a diagram showing a configuration of an optical disc 100 corresponding to a first format of the video camera device.

FIG. 3 is an enlarged view of a main part of the optical disc.

FIG. 4 is a diagram comparing a first format and a second format.

FIG. 5 is a diagram for explaining the contents of image stabilization of a video composed of three frames.

FIG. 6 is a diagram showing an image of a subject before camera shake occurs.

FIG. 7 is a diagram illustrating an image of a subject when camera shake occurs.

[Explanation of symbols]

1 video camera device, 21 CCD image sensor,
31 data processing / system controller, 33 MP
EG video signal processing circuit, 35 motion detection circuit, 38
Video controller, 51 optical head, 54 magnetic head

Claims (6)

[Claims] 1. A solid-state imaging device that outputs a video signal composed of a plurality of images that are temporally continuous by continuously releasing an electronic shutter. Motion vector detection means for detecting a motion vector for the immediately preceding video; storage means for storing video signals composed of the plurality of videos output from the solid-state imaging device; and each motion detected by the motion vector detection means An image pickup apparatus comprising: a correction unit that corrects a shift of each image stored in the storage unit based on a vector and performs a process of superimposing each image. 2. The image pickup apparatus according to claim 1, wherein said correction means performs the superimposition processing of each video until the video signal of which the superimposition processing of each video has reached a predetermined signal level. . 3. The image pickup apparatus according to claim 1, wherein the correction unit performs the superimposition processing of each of the images until the number of superimposed images reaches a predetermined number. 4. A solid-state imaging device that outputs a video signal composed of a plurality of images that are temporally continuous by continuously releasing an electronic shutter. A motion vector detecting means for detecting a motion vector for the immediately preceding picture; a video signal composed of the plurality of pictures outputted from the solid-state imaging device; and a motion vector detected by the motion vector detecting means. Recording / reproducing means for recording video signals and motion vectors recorded on the recording medium, recording means for storing the video signals reproduced by the recording / reproducing means, and recording / reproducing means. An image pickup apparatus comprising: a correction unit that corrects a shift of each video stored in the storage unit based on each of the reproduced motion vectors and performs a process of superimposing each video. 5. The image pickup apparatus according to claim 4, wherein said correction means performs the superimposition processing of each video until the video signal of which superimposition processing of each video has reached a predetermined signal level. . 6. The image pickup apparatus according to claim 4, wherein said correcting means performs the superimposition processing of each of the images until the number of superimposed images reaches a predetermined number.