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ecmelkytz/choma_key.m

Last active December 31, 2015 22:59
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choma_key.m
function [image,mask] = chromaKey(background, foreground, key)
R = key(1);
G = key(2);
B = key(3);
imF = (foregrond(:,:,1)<=R) & (foreground(:,:,2)<=G) & (foreground(:,:,3)>B);
imFu = cast(~imF, 'uint8');
imFm = cast(imF, 'uint8');
imCk = cast(ones(size(background)),'uint8');
imCk(:,:,1) = background(:,:,1).*imFm + imFu.*foreground(:,:,1);
imCk(:,:,2) = background(:,:,2).*imFm + imFu.*foreground(:,:,2);
imCk(:,:,3) = background(:,:,3).*imFm + imFu.*foreground(:,:,3);
image = imCk;
mask = imF;
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