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Video image color cast detection device and method

A video image and detection device technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of false positives and false negatives, reduce false positives and false negatives, improve accuracy, and increase the effect of secondary verification

Active Publication Date: 2020-07-10
山东华软金盾软件股份有限公司
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a video image color cast detection device and method, which solves the problem of false positives and missed negatives, improves the accuracy of color cast image detection, and can also use more complicated scene

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  • Video image color cast detection device and method
  • Video image color cast detection device and method

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Embodiment approach

[0040] Embodiments of the invention: see Figure 1-3 , a video image color cast detection device, comprising:

[0041] The statistical module is used to initially screen and detect the proportion of black, white and gray in the image. If the image color is all or partly composed of black, white and gray, the output is a normal image, otherwise the first detection module and the second detection module are executed;

[0042] The first detection module is used to convert the image of the RGB color channel into an HSV channel, group the converted HSV channels and calculate the H-S histogram, and compare the information entropy of the H-S histogram with the specified threshold for preliminary verification Whether the image is color cast;

[0043] The second detection module is used to compare the ratio of the combination with the largest number of pixels after the preliminary verification with the specified threshold, and / or compare the ratio of the information entropy to the abs...

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Abstract

The invention discloses a video image color cast detection device and method, which are used for detecting histogram information entropy in an image HSV color space. If the statistical information entropy is greater than a certain threshold, a color cast image is outputted, and otherwise, a normal image is outputted. The device comprises a first detection module used for converting an image ofa RGB color channel into an HSV channel, grouping the converted HSV channel, calculating an H-S histogram, comparing the information entropy of an H-S histogram with a specified threshold, and preliminarily verifying whether the image is subjected to color cast or not. A second detection module is used for , comparing the proportion of the combination with the maximum number of pixels with a specified threshold value after preliminary verification; and / or comparing the ratio of the information entropy to the absolute value with a specified threshold, carrying out secondary verification on thepreliminarily verified color cast image, to acquire the absolute value according to an absolute value formula by the position of the combination with the largest number of recorded pixels and the position of the mean value of sub-image blocks after record segmentation in the H-S histogram.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a video image color cast detection device and method. Background technique [0002] Color is one of the important characteristics of images, and it is also an important basis for image processing and analysis. There are many color models for color representation, among which the HSV color space model is a color model for human visual perception, which is closer to people's subjective understanding of color. [0003] At present, there are many color cast detection methods for digital images. For example, the color cast detection based on the RGB color space, this method counts the color ratio of each channel of R, G, and B separately to evaluate the color cast of the image, this algorithm has certain limitations, and a large number of errors may occur at the same time. Report, such as: a certain color of R, G, and B accounts for a large proportion of the picture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/90
CPCG06T7/0002G06T7/90G06T2207/30168
Inventor 袭喜悦杨公所陆腾
Owner 山东华软金盾软件股份有限公司
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