machine vision OCR algorithm

[Er.DKD]

Hello...my teacher asked me a question to which i was unanswerable...

the question was WHAT IS THE ALGORITHM BEHIND OCR AND THE TECHNIQUE INVOLVED???

I built an OCR system using machine vision OCR sessions... but i dont know what algorithm is behind all this???

Please answer the question...

Thanks...

[vekkuli]

Short answer is that it uses pattern matching style reading as opposed to feature based. I advise you to see the IMAQ Vision Concepts Manual (http://www.ni.com/pdf/manuals/372916c.pdf#page=289), it has a good description on the OCR you can study yourself to find a good answer for your teacher. Check that one out and if anything is still left unclear, then ask for some clarification. The wikipedia article on OCR might give you some introduction to the techniques as well (http://en.wikipedia.org/wiki/Optical_character_recognition#Techniques).

Please mind the style of the posts, it was a little unpleasent to read.

[MoviJOHN]

OCR uses Geometric Matching.