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RGBY-based shadow elimination method

A shadow removal and shadow technology, applied in the field of image processing, can solve the problems of extracting moving objects and affecting the coordinate accuracy of moving objects, etc., and achieve the effect of improving coordinate accuracy, superior performance, and eliminating influence

Inactive Publication Date: 2016-08-17
国网吉林省电力有限公司延边供电公司 +1
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Problems solved by technology

[0006] However, the above three methods can only be aimed at specific situations, and cannot accurately extract the outline of moving objects in various situations, eliminate the influence of shadows, and affect the coordinate accuracy of moving objects in a fixed background.

Method used

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Embodiment Construction

[0011] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific examples.

[0012] The shadow is the dark area projected by the object itself to the ground due to light irradiation. It is often extracted together with the target during dynamic target extraction. The shadow is generally dark, and the brightness of the pixels in the shadow area is higher than the brightness of the surrounding pixels. Low and does not change the RGB values ​​and texture of the overlaid background.

[0013] According to this characteristic, this method first uses the background difference of the grayscale Y channel in the fixed background, and the high threshold value of the sampling threshold method to extract the rough moving target and its shadow, and then combines the grayscale low threshold value and the RGB color model, Gaussian blur the R...

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Abstract

The invention discloses an RGBY-based shadow elimination method. Firstly, background difference of a gray Y channel and a high threshold of a sampling threshold method in a fixed background are used for extracting a rough moving target and a shadow thereof; in combination with a gray low threshold and an RGB color model, Gaussian blur is carried out on an RGB channel in a light spot extracted by the high threshold; and recursive integral processing is then carried out, and RGB after integral processing is converted into a Y signal. According to the shadow elimination method provided by the invention, the performance is excellent; the adaptability is strong; the shadow part in a contour of the moving object extracted in the fixed background can be quickly and accurately eliminated in various conditions; influences from the shadow are eliminated; and thus, the coordinate precision of the moving object in the fixed background is improved.

Description

technical field [0001] The invention relates to an image processing technology, in particular to an image shadow elimination technology. Background technique [0002] At present, in the related technical field, methods related to eliminating shadows in the contours extracted from moving objects include: [0003] 1. Eliminate shadows based on shadow position information, judge whether the extracted contours contain shadows according to the aspect ratio and length and width of the extracted moving object contours, and then calculate the shadows based on the latitude and longitude information of the background scene and the current time The direction and estimate the length of the shadow, and then eliminate the corresponding part in the extracted outline, so as to obtain the actual outline of the moving object. [0004] 2. Edge detection method, according to the extracted outline of the moving object, use the algorithm to calculate the edge in the entire graph, and then estima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/20
Inventor 时文东蔡亚平许晓辉朱永生谷慧
Owner 国网吉林省电力有限公司延边供电公司
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