Video image color cast detection method and device
A video image and detection method technology, which is applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of low detection efficiency and low accuracy
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[0039] Example 1:
[0040] After acquiring the video image to be detected including the color card, for the above step 102, the edge detection of the video image to be detected is performed to determine the pixels included in the multiple color modules of the color card in the video image to be detected. The following specific processing procedures are provided in 1, such as figure 2 As shown, it specifically includes the following processing steps:
[0041] Step 201: Perform edge detection on the to-be-detected video image to obtain a binarized edge image.
[0042] Specifically, edge detection algorithms in the prior art can be used, for example, edge detection algorithms such as Sobel operator, Prewitt operator, Robert operator, Canny operator, etc. are used to obtain the binarized edge image, which will not be described in detail here. .
[0043] Step 202: Perform expansion processing on the edge image to obtain an expanded image.
[0044] Among them, the expansion coefficient can...
Example Embodiment
[0067] Example 2:
[0068] In embodiment 1 of the present invention, such as figure 2 The shown processing flow 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 Amplitude. At this time, it is necessary to know the standard pixel value corresponding to each color module.
[0069] When shooting the color chart, the color chart is placed in a fixed direction. For example, it can be placed in a fixed forward direction, or it can be placed in a fixed backward direction, or it can be placed in a fixed left or right direction. The arrangement of the multiple color modules of the color card in the detection video image is the same as the arrangement of the multiple color modules when the color card is fixedly placed during shooting, which is known, so it ...
Example Embodiment
[0088] Example 3:
[0089] After determining the pixels included in the multiple color modules of the color card in the video image to be detected, and the standard pixel value corresponding to each color module has been known, the above step 103 can be performed, that is, for each color of the color card Module, according to the pixel value of the pixel 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. In Embodiment 3 of the present invention, for determining the A color module of the video image to be detected corresponds to the color cast range of the color, providing such 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 th...
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