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Thread Subject:
Matlab code for orientation field estimation algorithm for a fingerprint image

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: abhijeet_chakote@rediffmail.com (Abhijeet)

Date: 8 Sep, 2004 12:45:52

Message: 1 of 7

Hello,

This is my first time to ask the question on this mathforum.
I am not getting how to implement the orientation field estimation
algorithm for a fingerprint image.

First we have to divide the input fingerprint image into blocks of
size 10*10.

then compute the gradients Gx and Gy at each pixel in each block.
(do not use the gradient function in matlab)

I anybody help me for these two setps only.

You can send me code on abhijeet_chakote@rediffmail.com
Thanks

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: b_palit@rediffmail.com (Biswaroop Palit)

Date: 10 Oct, 2004 12:14:11

Message: 2 of 7

You can use the gradient function in matlab..do it for the entire
image, and then process block by block (the averaging of gradients
etc).

You can refer to Bazen's paper for the algorithm

Biswaroop


On 8 Sep 04 07:04:12 -0400 (EDT), Abhijeet wrote:
>Hello,
>
>This is my first time to ask the question on this mathforum.
>I am not getting how to implement the orientation field estimation
>algorithm for a fingerprint image.
>
>First we have to divide the input fingerprint image into blocks of
>size 10*10.
>
>then compute the gradients Gx and Gy at each pixel in each block.
>(do not use the gradient function in matlab)
>
>I anybody help me for these two setps only.
>
>You can send me code on abhijeet_chakote@rediffmail.com
>Thanks

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: Rishabh

Date: 5 Nov, 2010 20:59:05

Message: 3 of 7

hello, do you have this code ... i need it ... for my work ... can u help me by sending it to ... rm.ggenius@gmail.com ... i will be grateful to you ....




















abhijeet_chakote@rediffmail.com (Abhijeet) wrote in message <wezx0d2zo2n6@legacy>...
> Hello,
>
> This is my first time to ask the question on this mathforum.
> I am not getting how to implement the orientation field estimation
> algorithm for a fingerprint image.
>
> First we have to divide the input fingerprint image into blocks of
> size 10*10.
>
> then compute the gradients Gx and Gy at each pixel in each block.
> (do not use the gradient function in matlab)
>
> I anybody help me for these two setps only.
>
> You can send me code on abhijeet_chakote@rediffmail.com
> Thanks
>

Subject: Matlab code for orientation field estimation algorithm for a

From: ImageAnalyst

Date: 5 Nov, 2010 22:37:59

Message: 4 of 7

abhijeet has only ever posted once to this newsgroup, but it was only
6 years ago so I'm sure he's still monitoring the newsgroup waiting
for a question like yours. You should get a response shortly. Hang
in there.

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: Joshua Abraham

Date: 7 Nov, 2010 06:38:03

Message: 5 of 7

abhijeet_chakote@rediffmail.com (Abhijeet) wrote in message <wezx0d2zo2n6@legacy>...
> Hello,
>
> This is my first time to ask the question on this mathforum.
> I am not getting how to implement the orientation field estimation
> algorithm for a fingerprint image.
>
> First we have to divide the input fingerprint image into blocks of
> size 10*10.
>
> then compute the gradients Gx and Gy at each pixel in each block.
> (do not use the gradient function in matlab)
>
> I anybody help me for these two setps only.
>
> You can send me code on abhijeet_chakote@rediffmail.com
> Thanks
>

You can look at my code:

http://www.mathworks.com/matlabcentral/fileexchange/29280-fingerprint-matching-algorithm-using-shape-context-and-orientation-descriptors

I use orientation estimation (global orientation image) for one of my descriptors.

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: Neddy Nonesy

Date: 15 Dec, 2010 20:36:07

Message: 6 of 7

b_palit@rediffmail.com (Biswaroop Palit) wrote in message <oemomur8ffcs@legacy>...
> You can use the gradient function in matlab..do it for the entire
> image, and then process block by block (the averaging of gradients
> etc).
>
> You can refer to Bazen's paper for the algorithm
>
> Biswaroop
>
>
> On 8 Sep 04 07:04:12 -0400 (EDT), Abhijeet wrote:
> >Hello,
> >
> >This is my first time to ask the question on this mathforum.
> >I am not getting how to implement the orientation field estimation
> >algorithm for a fingerprint image.
> >
> >First we have to divide the input fingerprint image into blocks of
> >size 10*10.
> >
> >then compute the gradients Gx and Gy at each pixel in each block.
> >(do not use the gradient function in matlab)
> >
> >I anybody help me for these two setps only.
> >
> >You can send me code on abhijeet_chakote@rediffmail.com
> >Thanks
>

Can someone post a link to Bazen's paper or provide the title of the paper as a quick google search doesn't seem to find anything? Or alternatively, tell me which file in the fingerprint set of files calculates the gradient of each x,y pixel in an image? Any help would be much appreciated.

Subject: Matlab code for orientation field estimation algorithm for a fingerprint image

From: Ranjani Rathinavel

Date: 10 Sep, 2013 05:33:06

Message: 7 of 7

Can anyone help me with coding to find the orientation of fingerprint using gradient function??

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