i have a 3D color image , when i use a matlab code as below
x=imread('….');
R=x(:,:,1); % red
G=I(:,:,2); % green
B=I(:,:,3); %blue
figure, imshow (R);
it display grayscale image. and if i use the code given below
% Red channel only
im=imread('….');
im_red = im;
im_green = im;
im_blue = im;
im_red(:,:,2) = 0;
im_red(:,:,3) = 0;
figure, imshow(im_red);
it display red color image.
i need help in undestanding difference between these codes ?
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