How to get a picture of a gray image pixel gray value

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C # class batmap

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Third-party plug-in

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PS, bibulous look at the gray value

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Screenshots, thrown into the drawing tools, can see the color

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C # Emgucv class library is suitable for processing image
This is the method of use: emgucv
https://www.cnblogs.com/motao9527/p/10220445.html
Gray histogram threshold value is calculated using the extracting grey value

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(int) (color. R * 0.3 + color. G * 0.59 + color in B * 0.11);
The RGB respectively is red, green, and blue components
There is a simple Color. GetBrightness

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to inline style style property, and define the color, the color, then v can draw pixel values, and fill the ok

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https://www.cnblogs.com/DuanLaoYe/p/5386146.html