How to overlay a binary mask over an rgb image?

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Hadi Ghahremannezhad 2020-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/499646-how-to-overlay-a-binary-mask-over-an-rgb-image

评论： Hadi Ghahremannezhad 2021-2-24

I am trying to overlay a binary mask over an RGB color image. I want to change the white area of the mask to a transparent red area and put it over an rgb image.

For example:

image:

mask:

I want something similar to this:

I alredy tried this method but I couldn't figure it out. What is a simple way (no matter how slow) to do this?

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Turlough Hughes 2020-1-9

What size is your mask and original image?

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采纳的回答

Meg Noah 2020-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/499646-how-to-overlay-a-binary-mask-over-an-rgb-image#answer_409450

在 MATLAB Online 中打开

Here's some code:

img = imread('diplo000000-L.png');
mask = imread('sdfsd.png');
mask(:,:,1) = 0;
img(mask>0) = 0;
image(img)
set(gca,'ydir','reverse');
imwrite(img,'newimage.png');