How can I detemine the presence of some colors (e.g white, light brown, dark brown, red, blue gray and black) in a piture like attached one?

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I have to count presence of any colour if its number of pixels is more than 5% of total number of pixels.

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Image Analyst
Image Analyst 2020년 2월 22일
With 16 millino colors possible in a24 bit RGB image, probably no color has that much. You'd be best off defining a limited number, like 5 or 10, color ranges. Then like Daniel said, use the Color Thresholder App to get the area fraction for each color range that you specify.
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Image Analyst
Image Analyst 2020년 2월 22일
Try LDA, where you manually lassoo regions that you define to be whatever color you want. See my attached demo.

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Daniel Vieira
Daniel Vieira 2020년 2월 21일
the easiest way would be using the Color Thresholder App to create function for the each color you want.

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