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Remove Black Colour from image and select the region of interest

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Ittiphat Limsakul 2019-1-15

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https://ww2.mathworks.cn/matlabcentral/answers/439912-remove-black-colour-from-image-and-select-the-region-of-interest

I have a image

And I want to remove Black Colour out and select Yellow and Red and my output should be

How can i do it ?

Thanks !!

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