How can one find the self-similarity between two genuine handwritten signatures signed by the same person? Or, more specifically, how could one find the degree difference between two given images?
a signature is unique to everyone as finger prints this is because of the way it is signed, there different points where you have to check for similarities, they are the following
1. Strokes: you and i have a unique type of stroking technique if i draw a line i would go from bold line to thin line gradually which would look like a spear if its done in reality, where as you would have a continuous bold line.
2. lettering: for example "r" has different ways of writing, according to cognitive psychology when a human uses to way of writing a letter, he/she would think it as a artistic object rather than a letter, so there you would find mismatching if it is done again on a new paper.
3. calligraphy: i think about 15 to 20% of the worlds signature would at let have one calligraphic letter, you should also check on that.
4. computer vision: in computer vision using imaging processing technique you can use edge detection as a way to find the difference between two images, this could also help in your case.
hope this helps.
In temrs of image recorgnition I suggest you take a look on the reference below,
Turk M Pendatl A, 1991. Eigenfaces for recognition. J Cognitive Neiroscience 3(1):71-86
I found it very useful to analyze the drawing pattern (i.e. we captured the movement of the pen instead of the final image). We found writing speed was more informative the shape for authenticity detection (if you imitate, you write slower).
You could read my paper to see if there was anything useful for you http://scholar.google.co.uk/citations?view_op=view_citation&hl=en&user=W2pvAfEAAAAJ&citation_for_view=W2pvAfEAAAAJ:d1gkVwhDpl0C I can email you the complete version if you want?
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering
- Signal Processing
- Image Processing