Python: Basics of Zone Matching in Optical Character Recognition (Part 01)
1) Image Zones
2) Computing Zone Vectors of Images
3) Zone Vector Similarity
4) Zone Matching and OCR
5) Using Zone Vector Matching in Matching Characters of Different Fonts
6) Class home page is at http://vkedco.blogspot.com/2012/01/py...
7) Text version of this screencast with links to two character bitmap archives is at http://vkedco.blogspot.com/2012/02/py...
8) Video Narration: Vladimir Kulyukin
9) ERRATA:
When showing the find_all_zv_char_matches function, I mistakenly set the variable zv_helvR18_map to the zone vector map built from the directory with the courier bitmaps. The value of that variable should be set to the zone vector map built from the directory of the helvetica bitmaps. The cosine zone vector similarity b/w the helvetica A character and the courier A character should be below 1.