similar to gaussian filter for color

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Kasra Sadatsharifi 2021-6-8

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https://ww2.mathworks.cn/matlabcentral/answers/851040-similar-to-gaussian-filter-for-color

回答： Surabhi KS 2021-6-10

Hi everybody,

I am trying to find a way to convolve a filter that highlights the color red in the image attached below. I am trying to find a filter similar to gaussian filter to highlight the red square. I don't want to simply threshold the color though. It has to be filtered to create a red center with red halo around it. Does anybody know such a filter or how to built one? if you have a link to paper or something that would help more actually.

Thanks in advance

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Answer 1

Surabhi KS 2021-6-10

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https://ww2.mathworks.cn/matlabcentral/answers/851040-similar-to-gaussian-filter-for-color#answer_722035

You could try this:

Threshold the image to obtain the red rectangle, locate the center through centroid detection and define a matrix for the area of the rectangle (one side i.e. square) with a gaussian distribution with the mean and stdev of your choice.