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POGabor Phase ?? my values are too small
 

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    <p>Hi every one >> hope you all are doing fine </p> <p>I wanted to ask you about calculating the phase values for an image ,, you see I used the Gabor wavlet like so :</p> <pre><code>k = ( Kmax / ( f ^ v ) ) * exp( 1i * u * pi / 8 );% Wave Vector kn2 = ( abs( k ) ) ^ 2; GW = zeros ( R , C ); for m = -R/2 + 1 : R/2 for n = -C/2 + 1 : C/2 GW(m+R/2,n+C/2) = ( kn2 / Delt2 ) * exp( -0.5 * kn2 * ( m ^ 2 + n ^ 2 ) / Delt2) * ( exp( 1i * ( real( k ) * m + imag ( k ) * n ) ) - exp ( -0.5 * Delt2 ) ); end end I=imread('a.pgm'); Myimage=conv2(I,double(GW),'same'); </code></pre> <p>then I called the image and the filter with different orientations and scales and stored the phase in P then I wanted to quantize it with rang 4 i:</p> <pre><code>close all; clear all; clc; % Parameter Setting R = 32; C = 32; Kmax = pi; f = sqrt( 2 ); Delt = 2 * pi; Delt2 = Delt * Delt; % Show the Gabor Wavelets for v=1:7 %v = 1 : 7 for u = 1:5 % u= 1: 5 [GW,Myimage]= GaborWavelet ( R, C, Kmax, f, u, v, Delt2 ); % Create the Gabor wavelets figure; subplot( 5, 8, v * 7 + u ),imshow ( real( GW ) ,[]); % Show the real part of Gabor wavelets end figure ; subplot( 1, 5, v + 1 ),imshow ( abs( GW ),[]); % Show the magnitude of Gabor wavelets end %clear I; R=real(GW); I=imag(GW); M=abs(Myimage); P=atan(imag(Myimage)/real(Myimage)); &lt;&lt;&lt;&lt; is this even right ?? %P=atan(I/R); save P P; [xx,yy] = size (P); DATA =zeros(size(P)); for i=1:48 for j=1:48 for zz=1:3 if (360* zz/4) &lt;= abs(P(i,j))&amp;&amp; abs(P(i,j))&lt;(360*(zz+1)/4) DATA(i,j)=zz ; end; end; end; end; save DATA DATA ; </code></pre> <p>But the data is so small like : -1.49279186693682 1.50990968797986 -1.39225915272978 0.966151874072431</p> <p>which leads to quantized value of 0 >> Where did I go wrong </p>
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    1. COI think you will need to add some more explanation before the regular matlab users can help you with this. For example: Untill what point does the program do what you expect? And when it does not behave as expected, what does it do and what did you expect exactly?
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      1. USDennis Jaheruddin
 

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