what should be the parameter(​sigma,lamb​da,psi,gam​ma,theta)v​alues in gabor program ?

clc; clear all; close all; I=imread('katrina.jpg'); I=rgb2gray(I); I=imresize(I,[64 64],'bilinear'); [N N]=size(I) imshow(I) I=im2double(I); sigma=input('Enter the value of sigma '); psi=input('Enter the value of psi '); gamma=input('Enter the value of gamma '); n1=input('Enter the number of lambda you want to take '); lambda=input('Enter the different values of lambda '); n2=input('Enter the number of theta you want to take '); theta=input('Enter the different values of theta'); for i=1:n1 l=lambda(i); figure for j=1:n2 t=theta(j); g1=gabor_fn(sigma,t,l,psi,gamma); display('value of lambda');display(l); display('value of theta ');display(t); display('output of gabor filter will be');display(g1); % figure subplot(1,n2,j); GT=conv2(I,double(g1),'same') imshow(GT); end end

Answer 1

[chitresh]

lambda default value is 2 that is wavelength.

bw = 1 default bandwidth.

theta = 0 to 360 degree any thing u can choose

phase offset = -180 to 180

gamma = .5 default , 1 for circular and less than 1 orientation of the parallel strips

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