MATLAB: Error in display and write an image file…

image processing

 ISC(:,:,1) = ISCR(:,:) .* 255; 
 ISC(:,:,2) = ISCG(:,:) .* 255; 
 ISC(:,:,3) = ISCB(:,:) .* 255; 
 ISC = uint8(ISC);
 figure(1), 
 subplot(2,2,1), imshow(ISCR,[]);
 subplot(2,2,2), imshow(ISCG,[]);
 subplot(2,2,3), imshow(ISCB,[]);
 subplot(2,2,4), imshow(ISC);
I wanted to get a RGB image from ISCR, ISCG and ISCB… When I display the ISCR, ISCG and ISCB channels using figure, imshow(ISCR,[]); but if i give only figure, imshow(ISCR,[]); only full white figure file comes…
I wanted to display the final combined RGB image, i did the above code but I don’t view anything just white figure file… What can be the problem… Please rectify it for me…

Best Answer

That's because ISC and ISCR are double, not uint8 . It expects doubles to be in the range 0-1. If you have values above that, like 200 or 255, it will display them as white. If you use [], then it scales the array to 0-1 and then it will display fine because it's in the expected range.
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