JPH01125068A - Blur correcting device - Google Patents

Abstract

PURPOSE:To reduce the blur of a reproduced picture without adding many additional devices to an image pickup device main body by writing, at the time of reproducing from a recording medium, a reproduced video signal in an image memory, and controlling a read location in the image memory so that the blur of a picture is reduced by a reproduced moving vector signal. CONSTITUTION:A moving vector due to the blur of the image pickup device is detected by a moving vector detector 6. Thus, obtained moving vector signal, a video signal, and a sound signal are recorded on, for instance, a magnetic tape, etc., by a recorder 9. Thereafter, a signal recorded on the recording medium is reproduced by a reproducing device 10, and a video signal is written in the image memory 11. An image memory controller 12, in accordance with the magnitude of the reproduced moving vector, moves the effective screen so as to decrease the blur component at the read position of an image memory 11, and thus the correction control is executed. Since the blur correction is thus executed after the reproducing, only the detection of a moving vector needs to be executed in the image pickup main body, therefore, the image pickup part can be miniaturized and lightened.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a blur correction device for reducing camera shake during imaging with a line imaging device.

2. Description of the Related Art Conventional image stabilization devices include, for example, Japanese Patent Laid-Open No. 1986-14
A configuration shown in Japanese Patent No. 3330 is known. FIG. 4 is a block diagram showing a schematic configuration of this conventional image stabilization device, in which 1 is a movable optical system whose optical axis direction is variable according to a control signal, 2 is an image sensor, and 3 is a video signal processing device. , 4 is a blur detection device, and 6 is an optical system control signal generator.

In the conventional image stabilization device configured as described above,
When the imaging device captures an image of a screen that is blurred due to camera shake by the photographer, the blur detection device 4 detects the direction and magnitude of the blur, and based on this detection signal, the optical system control signal generation device 5
The movable optical system 1 is controlled to reduce blur. As a result, an optical image with reduced blur is incident on the image sensor 2. In this way, a screen with less blur can be obtained.

Problems to be Solved by the Invention However, in the above configuration, in order to correct blur during preparation, a movable optical system 1. Since the optical system control signal generating device 6 must be installed, the main body of the imaging device is large and heavy, and operability is inevitably deteriorated.

In view of the above, it is an object of the present invention to provide a blur correction device that can provide a screen free from camera shake using a small and lightweight imaging device.

Means for Solving the Problems In order to achieve the above object, the present invention, a bright blur correction device, has the following features:
an imaging device; a motion vector detection device that obtains a motion vector signal indicating information regarding the direction and size of movement of a screen due to shake of the imaging device; and a recording device that records the signal and motion vector signal obtained by the imaging device on a recording medium. a reproducing device for reproducing signals and motion vector signals obtained by the imaging device from a recording medium; It is characterized by comprising an image memory for reading out.

Effect: With the above configuration, the signal obtained by the imaging device and the motion vector signal due to the shake of the imaging device are recorded on the recording medium, and when the recording medium is played back, the reproduced video signal is written to the image memory, and the image memory is read out. By controlling the position using the reproduced motion vector signal to reduce image blur, it is possible to obtain a reproduced screen with less blur without adding many additional devices to the imaging device main body.

Embodiments Hereinafter, blur correction devices according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a blur correction device in a first embodiment of the present invention. In FIG. 1, 2 is an image sensor, 3 is a video signal processing device, 6 is a motion vector detection device that detects a motion vector that indicates information regarding the direction and magnitude of blur in the entire image pickup group, 7 is a microphone, and 8 is an audio a signal processing device; 9 a recording device for recording signals on a recording medium; 10 a reproduction device for reproducing signals from the recording medium; 11;
12 is an image memory control device that sequentially writes reproduced video signals and reads out the video signals according to the control signal; 12 is an image memory control device that generates a readout control signal for the image memory according to the reproduced motion vector signal; 13 is an image memory 11;
Converts the video signal read from the to a predetermined video signal,
This is a contest name conversion device.

The operation of the image stabilization device of this practical example constructed as described above will be described below.

First, the concept of motion blur correction and a blur correction method using it will be explained with reference to FIG. FIG. 2 shows the imaging screen, the effective screen inside it, and 1. This figure shows a set of motion vectors caused by the subject's movement due to blur, and the direction of the effective screen for blur correction in this case. In FIG. 2, the largest outer frame 4 is the imaging screen, and the area 1 within this frame is always imaged.

B is an effective screen that is actually used as a screen among the imaging screens. At this time, if the triangular object M1 moves to M2 due to the camera shake, the motion vector is represented by the arrow in FIG. By detecting this motion vector and moving in parallel from the effective screen B1 to B2 according to the magnitude of the motion vector, blur correction is performed even though the object is not moving within the vertical effect screen.

The address is calculated based on the address of the picture element on the current effective screen according to the size of the motion vector. Then, a new effective screen is set.

Then, that's it! The operation of the blur correction device of this embodiment will be explained based on normal operation. In FIG. 1, a motion vector detection device 6 detects motion vectors due to shake of the imaging device.
Detect the amount. Detection methods include methods that measure angular velocity due to shake of the imaging device and methods that measure acceleration.
By knowing the direction and magnitude of the movement of the screen from the measurement results, that is, the motion vector, it is possible to perform blur correction.

The motion vector signal obtained in this manner and the image sensor 2. A video signal obtained by the video signal processing device 3 and an audio signal obtained by the microphone 7 and the audio signal processing device 8 are recorded by a recording device 9 onto a recording medium such as a magnetic tape. Next, the signal recorded on the recording medium is played back by the playback device 10, and the video signal is written into the image memory 11. The image memory control device 12 performs the above-described correction control to move the effective screen so that the readout position of the image memory 11 is reduced in a blur component according to the magnitude of the reproduced motion vector signal or motion vector. The video signal read out from the image memory 11 is sent to the signal conversion device 13.
is converted into a predetermined video signal. As for the audio signal, the reproduced audio signal may be output as is, or it may be multiplexed with the video signal.

Since this is performed after birth, the imaging unit itself only needs to detect motion vectors, which allows the imaging unit to be made smaller and lighter. In addition, as is clear from Figure 2, since the effective screen is smaller than the imaging screen, the number of pixels used is small, and the resolution is inferior to that of the original image sensor, so when performing blur correction, the image quality decreases. However, in this embodiment, since the information of the entire imaging screen is recorded on the recording medium, it is possible to select whether or not to perform blur correction later. This is particularly advantageous when it is desired to reproduce one methyl screen from a video signal with a lot of blur and to make a hard copy, since the resolution of the screen does not decrease.

Next, a blur correction device according to a second embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram showing the configuration of a shake correction device according to a second embodiment of the present invention. In the same figure, 2 is an image sensor;
3 is a video signal processing device, 6 is a motion vector detection device, 7
8 is a microphone, 8 is an audio signal processing device, 9 is a recording device, 1o is a playback device, 11 is an image memory, 12 is an image memory control device, 13 is a signal converter, and the above structure is the same as that shown in FIG. It is something. What is different from the configuration shown in FIG. 1 is that a signal synthesis device 14 is provided, a motion vector signal is inserted into the vertical blanking period of the video signal and recorded, and on the playback side, a signal separation device 16 is used to generate motion vector signals. This is the point of separating the signal and video signal.

The operation of the shake correction device of the second embodiment configured as described above will be explained below, focusing on the points that are different from the first embodiment.

The motion vector signal detected by the motion vector detection device 6 is transmitted to the image sensor 2. It is inserted into the vertical blanking period of the video signal obtained from the video signal processing device 3 using the signal synthesis device 14. The video signal and audio signal thus synthesized are recorded on a recording medium. During playback, the signal separation device 16 separates the video signal and motion vector signal, and each image memo! J 11 , Input to the image control device 12. Then, the image memory 11 is read out so as to reduce the blurring component. In the manner described above, a blur-corrected video signal can be obtained.゛As described above, according to this embodiment, since the motion vector signal and the video signal are multiplexed and recorded by the signal synthesis device 14, blur correction can be performed without providing a recording location for the motion vector signal on the recording medium. It can be performed.

In the first and second embodiments, the motion vector signal was directly recorded on the recording medium, but the angular velocity, acceleration, etc. due to shake of the imaging device are recorded, and the motion vector signal is recorded in the image memory control device 12 during playback. The image memory 11 may be controlled by calculating .

Effects of the Invention According to the present invention, it is possible to remove the image stabilization means from the imaging section, and therefore, it is possible to obtain an image with less camera shake using a small and lightweight imaging section, and furthermore, it is possible to obtain an image signal with less camera shake. It is possible to correct blurring on the playback side, which has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a blur correction device according to a first embodiment of the present invention, Fig. 2 is an explanatory diagram of a method of blur correction, and Fig. 3 is a diagram showing a blur correction method according to a second embodiment of the present invention. Block diagram showing the configuration of the device. FIG. 4 is a block diagram showing the schematic configuration of a conventional blur correction device. 2...Image sensor, 3...Video signal processing device, 6...Motion vector detection device, 9...
...recording device, 10...playback device, 11...
... Image memory, 12 ... Image memory control device, 13 ... Signal conversion device, 14 ...
- Signal synthesis device, 16... Signal separation device. Name of agent: Patent attorney Toshio Nakao, 1st person, 2nd person
figure

Claims (2)

[Claims] (1) An imaging device, a motion vector detection device that obtains a motion vector signal indicating the direction and size of movement of the screen due to shake of the imaging device, and records the imaging signal obtained by the imaging device and the motion vector signal. a recording device for recording on a medium; a reproducing device for reproducing the signal obtained by the imaging device and the motion vector signal from the recording medium; and a reproducing device for writing the reproduced video signal and correcting blurring of the video signal using the reproduced motion vector signal. A blur correction device comprising: an image memory for reading out the written video signal so as to read out the written video signal. (2) The motion vector signal is inserted into a vertical blanking period of a video signal obtained by an imaging device and recorded on a recording medium by a recording device.
The image stabilization device described in Section 1.