Video image off-color detection method based on Lab space and correlation function

A correlation function and detection method technology, applied in the field of video image color cast detection, can solve the problems of high device dependence, poor applicability, poor reliability and accuracy, etc., and achieve the effect of universal adaptability

Active Publication Date: 2014-11-26
ENJOYOR COMPANY LIMITED
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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing image color cast detection methods, such as unevenness, high device dependence, poor applicability, poor reliability and accuracy, the present invention provides a method with good uniformity, low device dependence, A video image color cast detection method based on Lab space and correlation function with good applicability, higher reliability and accuracy

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  • Video image off-color detection method based on Lab space and correlation function
  • Video image off-color detection method based on Lab space and correlation function
  • Video image off-color detection method based on Lab space and correlation function

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] refer to Figure 1 ~ Figure 3 , a kind of video image color cast detection method based on Lab space and correlation function, comprises the steps:

[0033] 1) Obtain two adjacent frames of images of the detected video;

[0034] 2) Convert from RGB space to Lab space;

[0035] 3) Dividing the image into sub-blocks accordingly;

[0036] 4) Calculate the corresponding sub-block variance and correlation;

[0037] 5) Calculate the color difference of the corresponding sub-block;

[0038] 6) Combine the correlation coefficient and the color difference to find the color cast factor and compare it with the set threshold to judge whether there is a color cast.

[0039] Wherein, in step 2), the conversion of RGB to Lab is as follows:

[0040] L=0.2126007*R+0.7151947*G+0.0722046*B;

[0041] a=0.3258962*R-0.4992596*G+0.1733409*B+128;

[0042] b=0.1218128*R+0.378561...

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Abstract

The invention disclose a video image off-color detection method based on a Lab space and a correlation function. The method comprises the following steps: 1), obtaining two adjacent frames of an image of a detection video; 2), performing conversion from an RGB space to the Lab space; 3), correspondingly dividing the image into sub-blocks; 4), calculating variances and correlations of the corresponding sub-blocks; 5), calculating aberrations of the corresponding sub-blocks; and 6), solving off-color factors by combining correlation coefficients with the aberrations, and making a comparison with a set threshold so as to determine whether an off-color phenomenon exists. The video image off-color detection method based on the Lab space and the correlation function has the advantages of good uniformity, quite low equipment reliance, good applicability, and higher reliability and accuracy.

Description

technical field [0001] The invention belongs to the technical field of video image processing, and in particular relates to a video image color cast detection method. Background technique [0002] Color is one of the important characteristics of images, and it is often an important basis for image processing and analysis. Especially for the research of image segmentation, target detection and recognition, video retrieval and video target tracking, it has very important significance. [0003] The color is determined by the reflective properties and the color of the incident light. Because the human visual system has color constancy, that is, to a certain extent, it can eliminate the influence of factors such as lighting conditions on color, so as to correctly and truly perceive the color of objects. However, the imaging device does not have color constancy, so it will be affected by the ambient light, the reflection characteristics of the object itself, and the sensitivity ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/02H04N9/64
Inventor 冯远静成传胜单敏徐辉吴烨许优优李斐高成锋陈蒙奇叶峰
Owner ENJOYOR COMPANY LIMITED
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