Orientation Of Fingerprint Image

[Keith Bell]

I am trying to find the orientation image of a fingerprint so that I
can later enhance the print and then be able to extract the minutiae
points with the direction of the minutiae points. Basically the way I
was doing it was to take every pixel and find the orientation of the
block of pixels around it using sobel. And do this for every pixel.
Then smooth it. But this is not working and maybe I am doing it
completely wrong. Has anyone done this in c# or could point me in the
right direction.

Thanks in advance.
Keith

[William Ryan eMVP]

Check out www.brains-n-brawn.com and have a look at Casey's CAPTCHA
article - it's not fingerprints per se but the same principles should apply.

--
W.G. Ryan MVP Windows - Embedded

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"Keith Bell" <ru******@gmail.com> wrote in message
news:52**************************@posting.google.c om...

I am trying to find the orientation image of a fingerprint so that I
can later enhance the print and then be able to extract the minutiae
points with the direction of the minutiae points. Basically the way I
was doing it was to take every pixel and find the orientation of the
block of pixels around it using sobel. And do this for every pixel.
Then smooth it. But this is not working and maybe I am doing it
completely wrong. Has anyone done this in c# or could point me in the
right direction.

Thanks in advance.
Keith