I want to convert the below equation into a c code.
gabor eq:
G(x,y,theta,T) = exp{-0.5 (x'^2 / sigma_x^2 + y'^2 / sigma_y^2)}cos(2*pi*x'/T).
x' = x cos(theta) + y sin(theta);
y' = -x sin(theta) + y cos(theta);
sigma = standard deviation
T is the period of the sinusoidal plane wave
Here i know the theta - orientation of fingerprint image.
but for an image what is x,y,T,sigma_x and sigma_y and how i will calculate it.
please help me to calculate these things for fingerprint image.
thanks.