MATLAB: Calculating ridge orientation in fingerprint

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can any one provide me the code for calculating ridge orientation of each block, i have done using mat2cell for dividing the blocks but am getting only two values i don't know where am going wrong , can anyone tell me the code for that

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I suggest you search the forum for Gabor filter and read the FAQ.

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MATLAB: Matlab code to smooth and enhance the fingerprint image

I've seen coherence enhancing anisotropic diffusion filters used a lot on fingerprints. You can find code here for fingerprint enhancement and anisotropic diffusion: http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/#fingerprints

conv2() won't smooth it preferentially along rigelines like other filters unless all your ridgelines go in the same direction, which they don't for fingerprints. priya can check out section 21.6 here for filters optimized for fingerprints: http://iris.usc.edu/Vision-Notes/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics

MATLAB: How to calculate the angle between two lines from the same origin

O = [0. 0.] ; % origin 
% Two points 
A = rand(1,2) ; 
B = rand(1,2) ; 
u = O-A ; 
v = O-B ;  
CosTheta = (dot(u,v) / (norm(u)*norm(v)));

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MATLAB: How to calculate the angle between two lines from the same origin

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