correlation

hi,

I have a question about image correlation, i hope someone here can help me. I'd like to find the correlation image between an image eksempel2.bmp and a subimage eksempel2mask.bmp using Matlab.

my matlab code is:

I=imread('eksempel2.bmp');
J=imread('eksempel2mask.bmp');

[M,N]=size(I);
I=fft2(I);
I=fft2(double(I));
J=conj(fft2(double(J),M,N));

but then I get the error:

??? Error using ==> times
Array dimensions must match for binary array op.

on the internet i read that for the TIMES function to work, either the two inputs must be the same size or one must be a scalar.

but what if I want to recognize a subimage smaller than my image?? what should i do then?

thnx a lot guys..



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Why don't you use xcorr2 ?

Omer

----- Original Message -----
From: "Fatemeh Bazargan"
To:
Sent: Monday, May 22, 2006 12:58 PM
Subject: [imagedsp] correlation
hi,

I have a question about image correlation, i hope someone here can help me.
I'd like to find the correlation image between an image eksempel2.bmp and a
subimage eksempel2mask.bmp using Matlab.

my matlab code is:

I=imread('eksempel2.bmp');
J=imread('eksempel2mask.bmp');

[M,N]=size(I);
It2(I);
It2(double(I));
J=conj(fft2(double(J),M,N));

but then I get the error:

??? Error using ==> times
Array dimensions must match for binary array op.

on the internet i read that for the TIMES function to work, either the two
inputs must be the same size or one must be a scalar.

but what if I want to recognize a subimage smaller than my image?? what
should i do then?

thnx a lot guys.. Start a New Thread