images comparisson

hello to all im trying to compare two (grayscale) patterns and to tell if they are somewhat alike. i read that likeness measure can be done by comparing the 2d-fft of the two images. if it’s true, can someone tell me how to do the transformation and how do you think is good to compare the two? thanks A LOT !

Noam.

Answer 1

[Sean de Wolski]

What are you dealing with? If you're dealing with translation/rotation/scaling, FFT solutions are the way to go. If you just want a simple comparison you could use either the normalized cross correlation or the sum of the absolute differences...

[noam josef]

thank you for your answer.

im not dealing with simple comparison. im trying find a way of saying if pattern A look-alike pattern B. for example: is a checkerboard pattern can be camouflaged in a stripes pattern (or vice versa).