Which image processing or filtering is used in this image?

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burcu bilgic 2022-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/1775925-which-image-processing-or-filtering-is-used-in-this-image

评论： William Rose 2022-8-8

采纳的回答： William Rose

Picture1.png

Hi,

I want to identify which filtering or coloring is used in this image to make is yellow.

the original image is the gray one and resulting image is the yellow one.

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Image Analyst 2022-8-8

@burcu bilgic please accept @William Rose's answer below by clicking on the "Accept this answer" link to award him "reputation points" for figuring this out. 🙂

William Rose 2022-8-8

Thank you, @Image Analyst!

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William Rose 2022-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/1775925-which-image-processing-or-filtering-is-used-in-this-image#answer_1023065

@burcu bilgic, it looks like the image on the right is the complement of the image on the left.

J=imcomplement(I)

From the help for imcomplement:

In the complement of a grayscale or color image, each pixel value is subtracted from the maximum pixel value supported by the class (or 1.0 for double-precision images). The difference is used as the pixel value in the output image. In the output image, dark areas become lighter and light areas become darker. For color images, reds become cyan, greens become magenta, blues become yellow, and vice versa..