Hi What is the method of inverse Shuffle or unshuffle of Rand Blocks I used for Image Please any one help me in this regard Thank you

shuf_data=I1;
[M,indi,indj] = randblock(shuf_data,32);
figure;
J = im2uint8(M);
imshow(J,[])

[Geoff Hayes]

Fawad - is randblock a function that you have found from the MATLAB FEX? If so, please include the link to the file. (Or attach it as an m-file rather than a zip binary.)

Answer 1

[Jan]

According to the documentation of randblock:

[R,I,J] = RANDBLOCK(A) also returns indices I and J, so that R equals A(I)
and R(J) equals A.

So J(indj) or M(indj) is the inverse of the random permutation in your case.

[Fawad Masood]

@Jan Waooo Thanks its worked for M(indj).Thank you Geoff Hayes