Please see https://code.google.com/p/tesseract-ocr/source/browse/training/degradeimage.h https://code.google.com/p/tesseract-ocr/source/browse/training/degradeimage.cpp
It maybe possible to do additional training using degraded versions of 'synthetic' images which may improve recognition of older documents. ShreeDevi ____________________________________________________________ भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com On Thu, Apr 2, 2015 at 7:05 PM, Sven Pedersen <[email protected]> wrote: > Cool! Good work. I hope that will help the others who have been asking > about Georgian for a couple years. :-) > --Sven > > On Wed, Apr 1, 2015 at 9:28 PM, Derek <[email protected]> wrote: > >> I've recently finished training tesseract 3.03-rc1 on the Georgian >> language, using tesstrain.sh and based off the files in the langdata >> repository. I created my own word list and bigrams list using Wikipedia. >> >> Performance is very good on high-quality scans with modern fonts, but it >> doesn't do very well on older documents; I'm not sure whether this is >> because of differences in the font, or because the synthetic images >> generated by the tesstrain.sh script don't give tesseract enough training >> in handling degraded images. >> >> I've uploaded the traineddata file and all training files here: >> https://dl.dropboxusercontent.com/u/11840441/kat_train20150401.zip >> >> I'm attaching a test image (a randomly-selected scan from Georgia's >> registry of corporations) and the output of running tesseract recognition >> on the test image. No pre-processing was done on the test image except to >> upsample it to 300dpi. The test image contains some Latin characters so I >> ran tesseract with the language selector "kat+eng". >> >> The licensing for any documents to which I hold the copyright is the same >> as the tesseract source, i.e. the Apache License, Version 2.0 ( >> http://www.apache.org/licenses/LICENSE-2.0). >> >> -- >> You received this message because you are subscribed to the Google Groups >> "tesseract-ocr" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/tesseract-ocr. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/tesseract-ocr/ded0dcf6-e050-450b-8bcd-17dde924aafe%40googlegroups.com >> <https://groups.google.com/d/msgid/tesseract-ocr/ded0dcf6-e050-450b-8bcd-17dde924aafe%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > ``All that is gold does not glitter, > not all those who wander are lost; > the old that is strong does not wither, > deep roots are not reached by the frost. > From the ashes a fire shall be woken, > a light from the shadows shall spring; > renewed shall be blade that was broken, > the crownless again shall be king.” > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/tesseract-ocr. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/CAFTC0i5tzPcRkrspmQ0EREVtOXQ3ifsf_rP8TQ%2B7MaU3UkURhg%40mail.gmail.com > <https://groups.google.com/d/msgid/tesseract-ocr/CAFTC0i5tzPcRkrspmQ0EREVtOXQ3ifsf_rP8TQ%2B7MaU3UkURhg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAG2NduUXJuxf8orSD5OLG2A0zrbj4BqAbs6LkgB7t0mpUEnw1A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
