How can resolve this problems with fft?

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Biza Ferreira
Biza Ferreira 2015-6-24
Friends have the following problem I'm doing the enhanced fingerprint with FFT and i have done the following code
if true
% code
clear all,close all,clc;
k=0.45;
I = imread('database/101_1.tif');
I = 255-double(I);
[u v] = size(I);
u1=floor(u/32)*32;
v1=floor(v/32)*32;
IN = zeros(u1,v1);
for ii =1:32:u1
for jj=1:32:v1
l_a =ii+31;
l_c =jj+31;
FFT=fft2(I(ii:u1,jj:v1));
factor = abs(FFT).^k;
block = abs(ifft2(FFT.*factor));
max_block =max(block(:));
if max_block==0
max_block=1;
end
block = block./max_block;
IN(ii:l_a,jj:l_c)=block;
end
end
end
now this give me the following error: Subscripted assignment dimension mismatch.
Error in inpressoes2 (line 43) IN(ii:l_a,jj:l_c)=block;
someone can help me?

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