error in display and write an image file...

2 vues (au cours des 30 derniers jours)
Elysi Cochin
Elysi Cochin le 21 Mar 2015
Commenté : Elysi Cochin le 31 Mar 2015
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 commentaire
Geoff Hayes
Geoff Hayes le 21 Mar 2015
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 le 25 Mar 2015
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.
  7 commentaires
Image Analyst
Image Analyst le 30 Mar 2015
But you still have the matrix inverse function inv() in there??? That's weird.
Elysi Cochin
Elysi Cochin le 31 Mar 2015
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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