MATLAB: How to produce a solid green image directly above an imported image

imagepatchrectangleshapesquare

I have imported an image and I require there to be a solid green image of the same dimensions directly above the imported image. How would I go about doing this? I have attempted using patch but to no success.

Best Answer

I1 = imread('peppers.png') ; 
[nx,ny,nz] = size(I1) ; 
I2 = zeros(nx,ny,nz) ; 
I2(:,:,2) = 255 ; 
I12 = vertcat(I2,I1) ; 
imshow(I12)
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