repmatsam2.m

matlab实用教程

A=imread('input.bmp');
H = size(A);
BB=repmat(255, H(1)*H(2), H(3));
C=(A(:,:,1)==0 & A(:,:,2)==0 & A(:,:,3)==255);
BB(C,1) = 0;
BB(C,2) = 0;
B = reshape(BB, H(1), H(2), H(3));
imwrite(B,'output.bmp');