用源背景图像替换源图像的定义颜色 [英] Replace defined colors of a source image with a background image

问题描述

我需要编写一个带4个参数的函数：
更改图像的蓝色背景并将其替换为其他图像

I need to write a function that takes 4 parameters: to change the blue background of an image and replace it with other image

推荐答案

function bluescreen(A,B,c,thresh)
A = imread(A);
B = imread(B);
Ar = A(:,:,1);
Ag = A(:,:,2);
Ab = A(:,:,3);
Br = B(:,:,1);
Bg = B(:,:,2);
Bb = B(:,:,3);
logmap = zeros([size(A,1),size(A,2)]);
logmap = (Ar > (c(1)-thresh)).*(Ar < (c(1)+thresh)).*...
     (Ag > (c(2)-thresh)).*(Ag < (c(2)+thresh)).*...
     (Ab > (c(3)-thresh)).*(Ab < (c(3)+thresh));
Ar(logmap == 1) = Br(logmap == 1);
Ag(logmap == 1) = Bg(logmap == 1); 
Ab(logmap == 1) = Bb(logmap == 1);
A = cat(3 ,Ar,Ag,Ab);
imshow(A);
end

当你打电话时，
bluescreen（'peppers.png'，'tape.png'，[200 10 10]，50）;

它给你，

我不确定你想要什么！

好的。我剪了两张图片并打电话给 bluescreen（'A.png'，'B.png'，[30 30 120]，80）;

Ok. I cut both images and called bluescreen('A.png','B.png',[30 30 120],80);

我明白了，

我觉得这很好，不是吗？！

I think It is good enough, don't you?!

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