How to add two images excluding simalar elements

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D_coder 2019-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/451359-how-to-add-two-images-excluding-simalar-elements

评论： Walter Roberson 2019-3-22

The figure below shows two images and their addition. Is there a simple code or a function to avoid adding the highlighted area (triangle) in black

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Guillaume 2019-3-21

What do you define as "addition" of two images? For that matter, what do you define as image?

It looks like what you're asking may be the symmetric difference

It's actually really unclear what in your figure you call an image. Is the black rectangle part of the image? In that case, what is the result of the addition of black on black. Similarly, what is the result of addition of white on white. And if the highlighted rectangle is not added, what colour should it be? black? white?

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Walter Roberson 2019-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/451359-how-to-add-two-images-excluding-simalar-elements#answer_366546

在 MATLAB Online 中打开

mask = repmat(any(first_image ~= second_image, 3), 1, 1, 3);
total = first_image;
total(mask) = total(mask) + second_image(mask);

However, keep in mind that with white being fully saturated, if you add anything to it you are going to get a white result, so adding images will not give you the result you show. Adding the two images would give you white everywhere except the place the red overlaps.

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D_coder 2019-3-22

no it doesnt work

Walter Roberson 2019-3-22

Not many of us can be bothered to take your composite image and crop out sections of it in order to get images to test with. You should post the original images.

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