A video image color cast detection method and device

A technology of video image and detection method, which is applied in image enhancement, image analysis, image data processing, etc., and can solve the problems of low accuracy and low detection efficiency

Active Publication Date: 2017-08-25
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a video image color cast detection method and device to solve the problems of low accuracy and low detection efficiency of color cast detection of video images existing in the prior art

Method used

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  • A video image color cast detection method and device
  • A video image color cast detection method and device
  • A video image color cast detection method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] After the video image to be detected including the color card is acquired, the pixel points included in the color modules of the color card in the video image to be detected are determined by performing edge detection on the video image to be detected in the above step 102, the embodiment of the present invention 1 provides the following specific processing flow, such as figure 2 As shown, it specifically includes the following processing steps:

[0041] Step 201. Perform edge detection on the video image to be detected to obtain a binarized edge image.

[0042] Specifically, edge detection algorithms in the prior art can be used, such as edge detection algorithms such as Sobel operator, Prewitt operator, Robert operator, Canny operator, etc. to obtain a binarized edge image, and will not be described in detail here. .

[0043] Step 202, performing expansion processing on the edge image to obtain an expanded image.

[0044] Among them, the expansion coefficient can ...

Embodiment 2

[0068] Adopt the example in embodiment 1 of the present invention figure 2 The processing flow shown realizes that by performing edge detection on the video image to be detected, the pixels included in the multiple color modules of the color card in the video image to be detected are determined, and then the color cast of the corresponding color can be determined for each color module In this case, it is necessary to know the standard pixel value corresponding to each color module.

[0069] When shooting a color card, the direction of the color card is fixed. For example, it can be placed in a fixed direction, or it can be placed in a fixed direction, or it can be placed in a fixed left direction, or it can be fixed in a right direction. The arrangement of multiple color modules of the color card in the detection video image is the same as the arrangement of the color modules when the color card is fixedly placed during shooting, which is known, so it can be determined in adv...

Embodiment 3

[0089] After determining the pixels included in the multiple color modules of the color card in the video image to be detected, and knowing the standard pixel value corresponding to each color module, the above step 103 can be performed, that is, for each color of the color card module, according to the pixel values ​​of the pixels included in the color module, and the standard pixel value corresponding to the color module, determine the color cast range of the color corresponding to the color module of the video image to be detected. The color cast range of a color module corresponding to the color of the video image to be detected is provided as Figure 4 The processing flow shown specifically includes the following processing steps:

[0090] Step 401, determine the average value of the S component value of each pixel included in the color module in the HSI color space, as the average value of the S component of the color module, and the value of each pixel included in the c...

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Abstract

The invention discloses a video image color cast detection method and device. The method comprises the steps that a video image including a color card is acquired; edge detection is performed on the video image to be detected so that pixel points included by multiple color modules of the color card in the video image to be detected are confirmed; and color cast amplitude of colors corresponding to the color modules of the video image to be detected is confirmed according to the pixel points and pixel values included by the color modules and standard pixel values corresponding to the color modules by aiming at all the color modules of the color card. Compared with methods and the devices in the prior art, color cast amplitude of the video image is automatically detected via application of the method and the device so that the whole detection process is high in detection efficiency, data are objective and accurate and detection speed is high.

Description

technical field [0001] The present invention relates to the technical field of video image processing, in particular to a video image color cast detection method and device. Background technique [0002] The color of the video image is one of the important features of the video image, which can reflect the quality of the video image on the one hand, so it is necessary to detect the color cast of the video image to determine the degree of color cast of the video image. [0003] At present, the existing standardized detection method for video image color cast based on color cards is to use manual detection. First, the color card is photographed to obtain a video image including the color card. , manually locate the positions of these color modules, and use existing tools to extract the pixel value of each color module, and then compare the extracted pixel value of each color module with the standard pixel value of each color module, according to the comparison result The degr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/13G06T7/90
CPCG06T7/13G06T7/90G06T2207/10016
Inventor 潘晖潘石柱张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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