On Wednesday, September 9, 2015 at 1:30:38 PM UTC-4, Max Heiber wrote: > > Here's an example where the Chinese characters are very large and clear, > but Tesseract gets the wrong result. Could you advise on what image > processing could help Tesseract's accuracy? >
What have you tried so far? I got the following with about 30 seconds of playing with an image editor: 爸爸说我 It looks correct to me, but I don't read Chinese. Basically I just thresholded to send anything that wasn't very white to be completely black. I didn't even both inverting the white on black. Tom > > Thanks for your help! > > > > On Monday, November 12, 2012 at 4:45:02 PM UTC-5, Sven Pedersen wrote: >> >> To get better results you will need to increase the contrast and add a >> border. That image is very poor quality for text, Generally you'll want a >> bitmap type image format like TIFF or PNG, not JPG (which is for pictures). >> Read the FAQ for more info on preparing images for OCR, especially the part >> about x-height. >> >> As far as I know, Google has not released the full training data, however >> you can tell a lot by unpacking the language files. >> --Sven >> >> >> On Sun, Nov 4, 2012 at 8:00 PM, Rong Xiao <[email protected]> wrote: >> >>> >>> <https://lh3.googleusercontent.com/-gwRhWSanaHo/UJcdfs8hiSI/AAAAAAAAABQ/8jlKa2ZypFs/s1600/chi_test4.jpg> >>> >>> >>> >>> >>> >>> >>> such as this image.it 's not very complex. >>> >>> On Friday, November 2, 2012 10:03:00 PM UTC+8, sventech wrote: >>> >>>> Preprocessing can help. Give us some example images and we may be able >>>> to help. >>>> --Sven >>>> >>>> On Fri, Nov 2, 2012 at 7:25 AM, Rong Xiao <[email protected]> wrote: >>>> > hi,I have tried tesseract-ocr on chinese,but I found that it can do >>>> well on >>>> > only few fonts. I want to know what kind of fonts are included in >>>> > chi_sim.traineddata? If I expect better accuracy, need I train it by >>>> myself >>>> > ? >>>> > >>>> > thanks >>>> >>> -- 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/2a193162-a320-437e-b134-0d371a970734%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
