If you do find a font with whatthefont, then use the directions here: https://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract3 to train tesseract on the font. These directions aren't great though, so you can also look at some notes I created on training tesseract: http://emop.tamu.edu/node/47. You should also search this forum for a lot of information that isn't in the official google docs on Tesseract.
If you don't find a font you can use, the IDHMC <http://idhmc.tamu.edu>is about to release an open source tool, as part of our eMOP <http://emop.tamu.edu> project, that will let you create training pages for Tesseract using your own image files. We should be releasing that tool in beta in a week or two. On Wednesday, July 10, 2013 12:29:48 AM UTC-5, Kazem Jahanbakhsh wrote: > > Hi everyone, > > We have a set of images taken from buses head signs which displays bus id > and its route details displayed by LEDs. Our goal is to "*USE Tesseract > to Extract Texts Written in the Cropped Images*". When we selected the > first image shown below which reads as "*30 ROYAL OAK EX*", we got "*30 > RIWHL 0fl|( EX*" as the output. As you see, tesseract only detected some > of the characters correctly. > > ,<https://lh4.googleusercontent.com/-hFOIsEuVsUw/UdztzLbnqUI/AAAAAAAAAGw/OdNG99jkr3s/s1600/30_bus.jpg> > > We also tested tesseract with another headsign image input shown below > which reads as "*26 UVIC*". However, in this case tesseract returned > an empty string! > > > <https://lh4.googleusercontent.com/-tVeJU0Hyjis/Udzu19sURfI/AAAAAAAAAG8/Zme6iJHd_sA/s1600/bus_26_headsign.jpg> > > So, we have two questions: > > 1- Can we use Tesseract for such a task: specifically passing above image > with an english text inside and expecting to extract the text? > 2- If the above assumption is valid, what's the reason that tesseract > fails detecting the right text? Do we need to train tesseract with fonts > used in the bus head signs? If so, how can we do such a task? Finally, are > there any wiki pages that we can read which explains the internal > algorithms of tesseract and how it extracts texts from images? > > Any help would be really appreciated. > > Kazem > > -- -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en --- 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]. For more options, visit https://groups.google.com/groups/opt_out.
