error in display and write an image file...

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Elysi Cochin
Elysi Cochin 2015-3-21
评论： Elysi Cochin 2015-3-31
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…
  1 个评论
Geoff Hayes
Geoff Hayes 2015-3-21
Elysi - what is the minimum and maximum value for each of ISCR, ISCG, and ISCB? Which of the four subplots show the correct image, or do all of them just show a white image?

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Image Analyst
Image Analyst 2015-3-25
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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Image Analyst
Image Analyst 2015-3-30
But you still have the matrix inverse function inv() in there??? That's weird.
Elysi Cochin
Elysi Cochin 2015-3-31
no sir it was the inverse of the function... i found the inverse of the function using finverse and applied it to the code... and it worked well...

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