??? Index exceeds matrix dimensions.

displayDetectedBlocks('2.jpg',1,1,2) ??? Index exceeds matrix dimensions.

Error in ==> displayDetectedBlocks at 3 pos = pairsVec(booleanDistance==1,1:2);

CODE

function Jt = displayDetectedBlocks(It,blocks,booleanDistance,pairsVec)

   pos = pairsVec(booleanDistance==1,1:2);

   [m,n] = size(blocks);
   [blockSize(1),blockSize(2)] = size(blocks{1,1}.intensity);
   Jt = It;
   for i=1:size(pos,1)
       [K,L] = ind2sub([m,n],pos(i,1));
       topLeftPel = blocks{K,L}.topLeftPixel;
       Jt(topLeftPel(1):topLeftPel(1)+blockSize(1)-1,topLeftPel(2):topLeftPel(2)+blockSize(2)-1) = ones(blockSize(1),blockSize(2));
   end
figure
subplot(121),imshow(It),xlabel('Tampered Image'),
subplot(122),imshow(Jt),xlabel('Potential Tampered Image')

Answer 1

[Amit]

The error is in line

pos = pairsVec(booleanDistance==1,1:2);

You entered displayDetectedBlocks('2.jpg',1,1,2) and the pairsVec is a scalar or 1X1 matrix. In the line where the error appars, you're trying to access pairsVec's 2nd column which does not exist. That why the error appears.

[Gaurav]

Dear Amit

Can you suggest some inputs for displayDetectedBlocks('2.jpg',1,1,2)

CODE

function Jt = displayDetectedBlocks(It,blocks,booleanDistance,pairsVec)

   pos = pairsVec(booleanDistance==1,1:2);

   [m,n] = size(blocks);
   [blockSize(1),blockSize(2)] = size(blocks{1,1}.intensity);
   Jt = It;
   for i=1:size(pos,1)
       [K,L] = ind2sub([m,n],pos(i,1));
       topLeftPel = blocks{K,L}.topLeftPixel;
       Jt(topLeftPel(1):topLeftPel(1)+blockSize(1)-1,topLeftPel(2):topLeftPel(2)+blockSize(2)-1) = ones(blockSize(1),blockSize(2));
   end
figure
subplot(121),imshow(It),xlabel('Tampered Image'),
subplot(122),imshow(Jt),xlabel('Potential Tampered Image')

[Amit]

You can input pairVec as something like [2 2] That will atleast correct the current error.

However, if you input booleanDistance anything other than 1, it will throw an error again.