MATLAB: Error unravel.c

unravel.c compression jpeg

please help me. unravel.c code of gonzalez error in my matlab. What's wrong?

On line 33 you have a space between ! and =. It should be != with no space.

I think that you might as well replace

t = dctmtx(8);
y = blkproc(x, [8 8], 'P1 * x * P2', t, t');

with

y = blkproc(x, [8 8], 'dct2(x)')

and the quality is best for small values and very few coefficients are kept for larger values like 20. I hope this helps.

if it is mex file, its mean C code for matlab. then simply compile it by this command in matlab editor.

mex unravel.c;

then you can call unravel as function in matlab.