matlab 二值圖黑色變紅色

bw = imread('E:\rc\黎陽09170930\result09-27\result\result1+2+3\test (1).tiff');
%bw = im2bw(I,0.5);
%imshow(bw);
[r,c] = size(bw);
image = ones(r,c,3);
for i = 1:r
    for j = 1:c
        if bw(i,j) == 0
            image(i,j,1) = 255;
            image(i,j,2) = 0;
            image(i,j,3) = 0;
        end
    end
end
imshow(image);