Good image comparison technique for signatures.

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Alex
Alex 2012-4-30
I have two cropped images of a signature from bank cheque. What is the best way to compare the two images.
Pls some one help me with the code.
Thanks much.
Regards, Alex

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回答（4 个）

Image Analyst
Image Analyst 2012-4-30
Alex, That method is extremely primitive and most likely won't work for more than a few signatures (a very tiny database). I suggest you look to published papers for successful algorithms:
23.4.6.4.3 Signature Recognition, Surveys, Analysis, Comparisons
http://iris.usc.edu/Vision-Notes/bibliography/contentschar.html#OCR,%20Document%20Analysis%20and%20Character%20Recognition%20Systems
Jakob Sørensen
Jakob Sørensen 2012-4-30
Don't think code, until you have to idea in place. Do you have any specific ways you want it to work? Or any thoughts on it?
Alex
Alex 2012-4-30
Till now, this is what we have progressed..
Input image
Grey scale conversion
Thresholding
Binarization
Edge Detection
Convolution
The final step is to compare the two cropped signatures. We tried to compare the image by using the average value of the intensity from the signature. It didn't work as we planned.
So, i am open to suggestions/ideas.
Jakob Sørensen
Jakob Sørensen 2012-4-30
Supposing that the signature is more or less in the same place every time, how about some sort of cross correlation of the signature area?

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