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Detection method for video mosaic images

A technology of mosaic images and detection methods, which is used in image communication, image enhancement, image data processing, etc.

Inactive Publication Date: 2009-10-07
CHINA DIGITAL VIDEO BEIJING
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0025] In order to solve the problem that there is no video mosaic image detection method in the prior art, the object of the present invention is to provide a video mosaic image detection method, which can effectively detect whether there is a mosaic in the video frame image by adopting the method of the present invention

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  • Detection method for video mosaic images
  • Detection method for video mosaic images

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Embodiment Construction

[0061] Below to detect a frame in the video such as Figure 6 The image shown is taken as an example to describe the method of the present invention in detail.

[0062] Such as figure 1 As shown, a video mosaic image detection method includes the following steps.

[0063] (1) Obtain the image to be detected, that is, obtain it from the frame buffer Figure 6 The frame image of the video shown is referred to as the original image for short. Since Canny edge detection can only process single-channel arrays, it is necessary to convert the original image into a grayscale image, which is referred to as the grayscale image corresponding to the original image.

[0064] (2) Perform Canny edge detection on the grayscale image corresponding to the original image to obtain an image with only contour information, which is referred to as contour image for short. The method of Canny edge detection is the prior art, and the purpose of adopting Canny edge detection in the present inventio...

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Abstract

The invention discloses a detection method for video mosaic images, belonging to the technical field of image detection. A video mosaic phenomenon is a block effect phenomenon occurring when data in video transmission is lost or over compressed in video compression and can directly influence the understanding and the analysis of image contents. No method capable of effectively detecting the mosaic phenomenon exists in the prior art. The method comprises the following steps: firstly, converting an image to be detected into a gray image for cannae edge detection so as to obtain an image only with outline information; utilizing four templates to carry out the template match of the outline information so as to obtain four matched images; carrying out the binaryzation treatment of the four matched images so as to obtain an image only with matched points; and utilizing a sliding window mosaic detection algorithm to detect whether the image has mosaic or not. The method can effectively detect whether a video has mosaic or not.

Description

technical field [0001] The invention belongs to the technical field of image detection, and in particular relates to a video mosaic image detection method. Background technique [0002] The mosaic phenomenon is a block effect phenomenon in the video frame caused by data loss in video transmission or excessive compression in video compression. The main manifestation is the appearance of large continuous color blocks in the image. In the field of video quality detection and restoration, the appearance of video mosaic phenomenon will directly affect the understanding and analysis of image content. In the prior art, there is no method for detecting video mosaic images, and the present invention provides such a method. [0003] In order to better understand the method described in the present invention, the prior art involved in the present invention is briefly introduced as follows. [0004] Canny edge detection operator: It is an image multi-level edge detection algorithm dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00H04N7/26
Inventor 马华东黄晓冬杨金伟郝小峰
Owner CHINA DIGITAL VIDEO BEIJING
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