Cropping several images inside a for delivers empty cells

Question

Adrián G. 2023-2-27

评论： Adrián G. 2023-2-28

Hi. Im trying to process several images at once.

For cropping this is the code I'm writing:

I is raw images and I_ are cropped raw images.

RECT=[0 400 1024 200];
for K=1:10
    I_{k}=imcrop(I{k},RECT);
end

Images are 1024x1024 uint8 and are completely accesible and printable in variable I.

I_, after the code, is nothing more than a 1x10 empty cell.

When executing, for example,

% (in command window)
I_{1}=imcrop(I{1},RECT)

in the command window it works and writes the image in the variable spot I_{1} perfectly fine. I can do it one by one but the loop wont.

Answer 1

Stephen23 2023-2-27

编辑：Stephen23 2023-2-27

for K=1:10 % <- uppercase
    I_{k}=imcrop(I{k},RECT); 
end %  ^ lowercase ^

MATLAB is case-sensitive, so you need to make the index the same as the loop iterator.

Adrián G. 2023-2-28

Thank you Stephen. It went over my head.