John: thanks, I had not seen that! How does "tessedit_char_blacklist" affect OCR speed? Accuracy? I want to use it, but feel as if I am walking on thin ice..
Here is a list of ligatures from http://www.unicode.org/Public/UNIDATA/NamesList.txt , which ones do you commonly see in Tesseract output? FB00 LATIN SMALL LIGATURE FF # 0066 0066 FB01 LATIN SMALL LIGATURE FI # 0066 0069 FB02 LATIN SMALL LIGATURE FL # 0066 006C FB03 LATIN SMALL LIGATURE FFI # 0066 0066 0069 FB04 LATIN SMALL LIGATURE FFL # 0066 0066 006C FB05 LATIN SMALL LIGATURE LONG S T # 017F 0074 FB06 LATIN SMALL LIGATURE ST # 0073 0074 There are also Armenian ligatures, Hebrew, Arabic .. On Wednesday, June 10, 2015 at 9:23:12 AM UTC-4, John Slade wrote: > > Have a look at the options "tessedit_char_blacklist" and > "tessedit_char_whitelist". You could blacklist any ligatures you aren't > interested in. > > Or go the other way and just whitelist the things you want - for instance > you could whitelist to just the printable ascii characters. > > John > > > > On Monday, 8 June 2015 17:22:10 UTC+1, Rick Leir wrote: >> >> This problem with ligatures or digraphs is appearing frequently, how can >> I avoid it? I want simple output text, without ligatures. It is possible >> that the 'f' and 'i' are touching in the image. Is there a way to pass >> hints to Tesseract? Version 3.03 on Linux. TIA >> >> image text: fish >> OCR: "\x{fb01}sh"; >> utf8: fish >> >> image text: flambeau >> OCR: "\x{fb02}ambeau,"; >> utf8: flambeau, >> >> "\x{fb01}xed"; >> fixed >> >> "arti\x{fb01}cial"; >> artificial >> > -- 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/12330e88-ce51-4d51-9b19-63cf36d8f940%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
