JPH04268885A - High picture quality image swing correction method, and device with image swing correction device - Google Patents

Abstract

PURPOSE:To obtain satisfactory picture display without picture swing by providing a device correcting the swing of a screen at the time of image pickup to a picture display device or a picture recording/reproducing device. CONSTITUTION:An input video signal is converted into a digital video signal by an A/D converter and is signal-processed in terms of digital. A picture quality improvement processing means 6 executes a picture swing correction processing and a double density processing as against the signal which is digital- processed. The video signal which is subjected to picture swing-correction and double density-interpolation is double density picture-displayed on CRT 9 by sequential scanning through a deflection scanning means 7 consisting of a deflection processing means, a D/A converter and an RGB processing means, and a video output processing means 8. Thus, a picture without swing, which is easily viewed, can be obtained for a display picture. Since the video signal which is subjected to the double density-interpolation by the double density processing means is displayed as a double density picture by sequential scan, there is no deterioration of picture quality even if the picture swing correction processing is executed, and the high picture quality image can be obtained.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to image shake correction that can display high-quality images without shaking by correcting image shake caused by blur during image capture of video signals captured and recorded by a video camera. It is suitable for use in television receivers, image recording/playback devices, etc.

0002

[Prior Art] In recent years, with the spread of video cameras, it has become common for people to enjoy viewing images captured and recorded by themselves using an image display device such as a television receiver as a monitor. .

[0003] Conventionally, this type of recorded image suffers from image blur (hand shake) when it is captured due to the miniaturization and weight reduction of video cameras, and as a result, the reproduced image often shakes and becomes very difficult to view. . For this reason, video cameras that are equipped with an image blur prevention function that corrects image blur during image capture are on the market. However, most video cameras already on the market do not have such an image blur prevention function, and even among the video cameras currently on sale, only a limited number of models are equipped with an image blur prevention function. Most of them do not have an image stabilization function.

Furthermore, since the conventional image blur correction device is attached to a video camera that is small and lightweight, it does not include a high-density image processing device for the video signal after blur correction.

[0005] Therefore, an image signal captured and recorded by a conventional video camera with an image blur prevention function that removes the shaking part of the image and enlarges only the common part to a predetermined size is displayed as an image by a large-screen image display device. When displayed, the resolution deteriorates slightly, so it is not always possible to obtain a sufficient display image. .

[0006]

[Problem to be Solved by the Invention] In this way, it is possible to reproduce video signals captured and recorded by many video cameras that do not have a function to prevent image blurring during image capture using an image display device such as a television receiver as a monitor. When displayed, the blurring of the image caused when the video camera took the image will be played back and displayed, so the playback screen will not be able to be viewed calmly due to the ``shake'', and the recorded image will be of low value. I had no choice. Therefore, it is possible to monitor as a reproduced image a video signal in which image blur is recorded as it is, captured by a handy small and lightweight video camera that is already widely available.
When displayed, there is a problem in that "shaking" of the image occurs on the playback display screen.

Furthermore, the image signal captured and recorded by a conventional video camera with an image blur prevention function that removes the shaking part of the image and enlarges only the common part to a predetermined size is a zoomed image signal. Therefore, when displaying an image using a large-screen image display device, there has been a problem in that some deterioration in image quality is unavoidable.

[0008] The present invention solves the above-mentioned problem, and even when a video signal is reproduced and an image is displayed, where the image blur at the time of image capture is captured and recorded, "shaking" of the screen occurs on the reproduced display screen. An object of the present invention is to provide an image display device and an image reproducing device with an image shake correction device that does not.

Another object of the present invention is to provide an image shake correction device and an image shake correction method that can provide high quality images without deterioration in image quality even when displayed on a large screen.

0010

[Means for Solving the Problems] In order to achieve the above object, the image shake correction device of the present invention includes an A/D converter connected to a video signal input terminal, an image shake vector detector, and an image enlarger/digital converter. It is composed of a readout section, a memory for storing digital video signals, and a microcomputer-based control means, and is also provided with signal interpolation means for producing a high-density image signal. Further, the image shake correction device of the present invention is arranged in an image display device such as a television receiver, an image reproduction device, or an image recording device to form a device with an image shake correction device.

[0011]

[Function] With the above-described configuration, in the television receiver equipped with the image shake correction device and the recorded image playback device of the present invention, even when playing back an image record taken by a video camera without an image shake prevention function, the screen It is possible to play back and display high-quality images without shaking. Furthermore, even when an image is displayed on a large-screen image display device, a high-density display image can be obtained without deteriorating the image quality.

0012

[Embodiment] Hereinafter, an embodiment of an image shake correction device of the present invention and a device such as a television receiver equipped with the image shake correction device will be described with reference to the drawings. FIG. 1 is a block diagram of a television receiver equipped with an image shake correction device showing an embodiment of the present invention.
The captured and recorded image signal reproduced from a recording medium such as a tape is inputted from the external signal input terminal 2 of the television receiver and displayed as an image on the CRT 9 via the television circuit. In the embodiment of FIG. 1, the input video signal is A
The signal is converted into a digital video signal by a /D converter, and digitally processed. The image quality improvement processing means 6 performs image shake correction processing and double density processing on this digitally processed signal. The video signal subjected to image shake correction processing and double-density interpolation processing is sent to a deflection processing means, a D/A converter, and an RGB
A double-density image is displayed on the CRT 9 by sequential scanning through a deflection scanning means 7 and a video output processing means 8, which are comprised of processing means and the like.

[0013] Even for video signals captured and recorded by a video camera device that does not have an image shake prevention function,
Since image shake correction is performed in the image quality improvement processing means 6, a display image that is easy to see without "shake" can be obtained. Further, since the video signal subjected to double density interpolation by the double density processing means is sequentially scanned and displayed as a double density image, there is no deterioration in image quality even when image shake correction processing is performed, and a high quality image can be obtained.

FIG. 2 is a block diagram of the image shake correction apparatus, and FIG. 3 is a block diagram showing an embodiment of the high-quality image shake correction apparatus. In the figure, with a delay difference of 1H, 2
The video signal is stored in two field memories, and the representative point of each field is stored in the representative point memory through a filter, and the correlation between the two fields is calculated to detect the image shaking vector. Based on this image shaking vector detection signal, the images between the two field memories are shifted so that they match, and the common area of each field is read out. Since the read video signal of the common area is narrower than the video signal of the original field area, it is enlarged to have the same range as the original field area. The enlarged and read video signal is subjected to double-density interpolation processing.

FIG. 4 is an explanatory diagram showing the state of an image after image shake correction processing and the state of an image when high-density interpolation processing is performed. In the figure, (a) and (b) show the scanning lines of the original image, and (c) shows the scanning line of the image subjected to image shake correction processing. The image in (c) is the original (a
) and (b), the scanning lines on the screen are considerably rougher, and some image quality deterioration occurs. (
c) shows the scanning line in the image after double-density interpolation processing of the video signal subjected to image shake correction processing, and shows the scanning line in the image after the image shake correction processing has been performed.
) and (b), the image quality is also improved.

FIG. 5 is a block diagram illustrating a case where the image shake correction device is incorporated into a television receiver. In a television receiver using general analog signal processing, the image shake correction device performs only image shake correction processing. It can be configured as an attached television receiver.

[0017] The high-quality image shake correction device having the high-quality image processing means and image shake correction processing means can be similarly incorporated into a television camera or an image recording/reproducing device. (not shown)

[0018]

Effects of the Invention According to the television receiver equipped with the image shake correction device of the present invention, even when a video signal with “shake” captured and recorded by a handy small video camera is played back and displayed, the image can be displayed without any image shake. A clear image display can be obtained.

Furthermore, in devices such as television receivers incorporating a high-quality image-shake correction device that implements a high-quality image-shake correction method that performs double-density interpolation processing of video signals, image quality deterioration caused by image-shake correction can be eliminated. , it is possible to realize high-quality image display without image shaking.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a television receiver that performs digital signal processing and incorporates a high-quality image shake correction device according to an embodiment of the present invention.

[Fig. 2] A block diagram showing an embodiment of an image shake correction device incorporated into a television receiver, etc.

FIG. 3 is a block diagram of a high-quality image shake correction device according to an embodiment of the present invention.

[Figure 4] An explanatory diagram comparing the image quality after image shake correction processing, the original image quality, and the image quality after double-density interpolation processing

[Fig. 5] Block explanatory diagram of a television receiver with an image shake correction device

[Fig. 6] Block configuration diagram of a conventional imaging device with an image shake correction device

[Explanation of symbols]

1 Image reproduction device 2 External signal input terminal of television receiver 4 Signal processing device 6 Image quality improvement processing means 63 Field memory 64 Field memory 65 Shaking vector detection control & memory control device 66
Microcomputer 603 Representative point memory 604 Correlation calculation section 610 Double-density Y interpolation means 620 Double-density C interpolation means

Claims (7)

[Claims] 1. An A/D converter connected to a reproduced video signal input terminal from an image recording and reproducing device, a shaking vector detecting section, an image enlargement/reading section, and a digital converter connected to the A/D converter. It is equipped with a memory for storing video signals, a microcomputer for controlling the vibration vector detection section and the image enlargement/readout section, and a display means for displaying the signal from the image enlargement/readout section as an image. An image display device with an image shake correction device, characterized in that: 2. An A/D converter connected to a reproduced video signal input terminal from an image recording and reproducing device, a shaking vector detecting section, an image enlarging/reading section, and a digital converter connected to the A/D converter. A memory for storing video signals, a microcomputer for controlling the vibration vector detection section and the image enlargement/readout section, and a frame correlation or intrafield correlation for the signals from the image enlargement/readout section. a signal interpolation means for performing scanning line interpolation to produce a high-density image signal;
An image display device with an image shake correction device, characterized in that the image display device includes display means for displaying the high-density image signal. [Claim 3] A/D connected to the video signal output terminal
a converter, a shaking vector detecting section connected to the A/D converter, an image enlarging/reading section, and a memory for storing digital video signals, and a memory for controlling the shaking vector detecting section and the image enlarging/reading section. An image shake correction device that is equipped with a microcomputer and a D/A converter that converts the signal from the image enlargement/readout section into an analog signal, and is capable of supplying a video signal output with shake correction of a reproduced image. Image playback device. 4. An A/D converter connected to a video signal output terminal; a shaking vector detecting section, an image enlargement/reading section, and a memory for storing a digital video signal connected to the A/D converter; A microcomputer for controlling the vibration vector detection section and the image enlargement/readout section performs scanning line interpolation on the signals from the image enlargement/readout section using frame correlation or intra-field correlation, and performs high-density It is characterized by comprising a signal interpolation means for converting into an image signal, and a D/A converter for converting the high-density image signal into an analog signal, and supplying the video signal after shake correction of the reproduced image as a high-density image signal. An image reproducing device with an image shake correction device. 5. An A/D converter that converts an imaging input signal into a digital signal, a shaking vector detection section connected to the A/D converter, an image enlargement/readout section, and a memory that stores the digital video signal. , a microcomputer for controlling the vibration vector detection section and the image enlargement/readout section, and scan line interpolation of the signals from the image enlargement/readout section using frame correlation or intra-field correlation, and 1. An image recording apparatus with an image shake correction device, comprising: signal interpolation means for converting the high-density image signal into a high-density image signal; and recording means for recording the high-density image signal. 6. A shake vector detection section, an image enlargement/readout section, and a memory for storing digital video signals connected to an A/D converter, and a memory for controlling the shake vector detection section, image enlargement/readout section. microcomputer and
An image shake correction apparatus comprising: signal interpolation means for performing scanning line interpolation on the signal from the image enlargement/readout section by frame correlation or intra-field correlation to produce a high-density image signal. 7. Enlarging only the common portion of the digital video signals recorded in the two field memories to a predetermined size and reading each of them, and converting the read signals into a frame.
Scan line interpolation is performed using system correlation or intra-field correlation,
An image shake correction method characterized by generating a high-density image signal.