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Fingerprint orientation map

asked 2013-03-17 13:06:40 -0600

Milanista gravatar image

Hello. I'm working with fingerprints in openCV c++ and I need to make an orientation map like this:

image description

Could you help me how to do it? I would greet some code,too :)

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answered 2013-03-17 13:56:15 -0600

What you basically are telling us is that you probably have a school assignment to implement this stuff on your computer and you want us to provide you with a solution. Because I think that people learn more by actually trying, I will set you on the right way.

The orientation map is created by looking at the rough surface of the finger. You want to create a representation of the most specific edges in the image.

So have a look into edge detection algorithms:

After you have segmented out edges, create a binary image from that. You could use the binary image to match linear Hough Transforms to detects lines, straight parts and see if that gets you anywhere.

Try some stuff out and report back with questions.

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Thank you! I just started to make this part of my program today, I was just stuck a bit with it. I tried some of the things you wrote, so I must be on the correct way. Tomorrow I will continue and I hope I will find the solution. Thanks for the good answer :)

Milanista gravatar imageMilanista ( 2013-03-17 14:27:34 -0600 )edit

You are welcome. Feel free to accept the answer if it actually solves your problem :)

StevenPuttemans gravatar imageStevenPuttemans ( 2013-03-17 14:35:54 -0600 )edit

with this I can't see how it is possible to get an orientation map

nar6du14 gravatar imagenar6du14 ( 2016-04-19 13:51:17 -0600 )edit

A edge filter gives you an orientation and a size. You just have to average over bins.

StevenPuttemans gravatar imageStevenPuttemans ( 2016-04-20 03:33:41 -0600 )edit

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Asked: 2013-03-17 13:06:40 -0600

Seen: 1,513 times

Last updated: Mar 17 '13