GUI red, blue, and green channels

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I'm working on a problem involving opening an image in a GUI and show it in an axes. I also need to show 3 images for the red, green, and blue channels in three separate axes in the same GUI. I'm having troubling with creating the three other images. Any ideas?

Accepted Answer

Walter Roberson
Walter Roberson on 21 Jul 2019
[filename, filepath] = uigetfile();
if ~ischar(filename); return; end %user cancel
fullname = fullfile(filepath, filename);
img = imread(fullname);
R = zeros(size(img), class(img));
G = R;
B = R;
R(:,:,1) = img(:,:,1);
G(:,:,2) = img(:,:,2);
B(:,:,3) = img(:,:,3);
imshow(handles.axes_for_RGB, img);
imshow(handles.axes_for_R, R);
imshow(handles.axes_for_G, G);
imshow(handles.axes_for_B, B);

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