open-source character recognition

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This page is still under construction!

This is an overview, made mainly for developers. You can find typical example files made by me and sent by others. You can pick a example and try to improve gocr. Note that the other examples should be recognized like before your changes or even better.

Users can get a first impression here of how well gocr works.

TOPICS:
  1. excellent examples
  2. good examples
  3. unsorted examples (from other people)
Only errors, where good readable characters are not recognized, or completely wrong recognized are counted. Errors where a "0" (zero) is printed as "O" (like Omega) is not counted. Sometimes missing accents are also not counted. Take it as a rough overview. It is also counted by hand, so it is not very exact.

excellent examples

pbm=black/white, clean scans 

testfile         ----size----   num_c num_errors  remarks
--------         kB   x    y    wc    g027        
font1.pbm.gz     40 1623  953  905   7        build by latex+gs 300dpi, 12pt, mixed fonts
font2.pbm.gz     24 1083  637  905  14        build by latex+gs 200dpi, 12pt, mixed fonts


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old overview:

testfile      size   num_c quality  time num_errors  remarks
--------      x    y       -------  p1   p1 p2 p3
g300a1.pbm  703  580   469 +        2s    4 -   0
g300a2.pbm  724 1252  1021 +        5s    2 0   0
g300b1.pbm 1564  277    55 +        4s    0 1   1
g300b2.pbm  599 1319   860 snowy    9s   76 -  40
g300b3.pbm  592 1324   934 snowy    7s   36 2  15
g300c1.pbm  750 2771  2182 +       15s   35 1  14
liebfrau1  2289 3200  1927 +       19s   13 0   8
meraji1    1912 1355  1246 thinn   15s   65 4  40
paraguay1  2617 1375  3280 frame   78s 1000 1  55

p1=gocr0.2.4a3 on P400
p2=recognita+4.0
p3=gocr0.2.5

most errors: connected chars, like fi,ff, italic font

unsorted examples 


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