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2013-03-19 09:24:14 -0600 commented answer fingerprint orientation map through gradient method - opencv c++

thanks for the help!, I will try this and will return to you for further guidance :)

2013-03-19 07:54:11 -0600 commented answer fingerprint orientation map through gradient method - opencv c++

Thanks for your kind reply StevenPuttemans. As per your suggestion should i apply to a 5x5 block or to every 5 pixels in the image? and can i use the input fingerprint image rather than orientation matrix from your example to get the arrows along the ridges of the fingerprint.

2013-03-17 22:37:38 -0600 asked a question fingerprint orientation map through gradient method - opencv c++

I am trying to develop a fingerprint system using OpenCV 2.4.3 and C++ in Visual Studio 2010. I need to form the orientation map of the input fingerprint in order to use it in Gabor filters. I have computed the gradient x and y values using Sobel filters. But I don't how to form a orientation map from this. Can anyone help me with the steps to do so. Thanks in advance.

2013-03-06 10:52:06 -0600 commented question Fingeprint thinning code preserving continuity of ridges

I get this following error, when i run the code using a test image that contains a letter 'O' in binary

Unhandled exception at 0x7554b9bc (KernelBase.dll) in skeleton.exe: Microsoft C++ exception: cv::Exception at memory location 0x0018edb4..

I am yet to test it with a fingerprint image.

2013-03-06 10:02:17 -0600 asked a question Fingeprint thinning code preserving continuity of ridges


I am trying to develop a project that involves fingerprint matching. Now, I am stuck at the stage of Fingerprint thinning. I am coding my project using OpenCV and c++ Visual Studio 2010.

I tried erode() function, but it doesn't preserve the continuity of ridge lines. I also tried the following algorithm of Zhang-Suen thinning,

but, this shows an exception at memory location. I don't know how to proceed and i am stuck with this step.

Kindly help me with the code for fingerprint thinning + also preserving continuity of ridges.

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2013-01-23 01:34:09 -0600 commented answer Fingerprint matching in mobile devices (Android platform)

Thanks for your kind reply, but i am planning to read the fingerprint by means of a scanner, so i believe the clarity of the image obtained will be better than the one obtained through camera.

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2013-01-22 09:16:04 -0600 asked a question Fingerprint matching in mobile devices (Android platform)


I am intending to do my mainstream project in image processing domain. My project's aim is to enable user with finger print security in mobile devices. It involves:

1) Reading the fingerprint from user through mobile phone.

2) Matching the fingerprint image obtained with those available in the database.

I am interested in coding my project in OpenCV and deploying in Android. I need clarifications on few of the following things:

1) Is this project feasible?

2) Is OpenCV apt for this project? (considered Matlab, but it doesn't have portability to Android)

3) Eclipse or Visual Studio?, which will be more suitable (considering the deployment in android)

I am a beginner and need to learn OpenCV, so please guide me how to start my project (what are the tools, books for reference and the IDE's, SDK's to be used)

Prompt reply will help me a lot, Thanks in advance :)