I am doing research on images using gabor filter. I have read the following post:
Apply a Gabor filter to an input image
There must be some formula to determine the value for gamma,sigma,lambda,psi...can i know how to determine it?
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The best values for these parameters depend on your application. You should probably try different values on a validation set to find out which ones work best for you.
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$\begingroup$ I am using it for feature extraction of finger vein and finger knuckle. $\endgroup$– user7186Dec 6, 2013 at 7:30
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$\begingroup$ The lambda parameter sets the wavelength of your gabor filter. It's value depends on the width of what you're interested in. $\endgroup$– AaronDec 6, 2013 at 7:41
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$\begingroup$ I am using Matlab to do feature extraction of finger vein and finger knuckle. gb= exp(-.5*(x_theta.^2/sigma_x^2+y_theta.^2 /sigma_y^2)).*cos(2*pix_thetaf) From my understanding, sigma=sigma = lambda/pi*sqrt(log(2)/2)*(2^bw+1)/(2^bw-1); sigma_x = sigma; sigma_y = sigma/gamma; What are the suitable value for lambda,gamma,and bw? I am not quite understand about the width, can explain in detail? $\endgroup$– user7186Dec 6, 2013 at 7:57