For details regarding bazaar pattern, see section regarding config files in
http://tesseract-ocr.googlecode.com/svn/trunk/doc/tesseract.1.html Now, if you pass the word *bazaar* as a trailing command line parameter to > Tesseract, Tesseract will not bother loading the system dictionary nor the > dictionary of frequent words and will load and use the eng.user-words and > eng.user-patterns files you provided. The former is a simple word list, one > per line. The format of the latter is documented in dict/trie.h on > read_pattern_list(). See link below for details of the patterns http://code.google.com/p/tesseract-ocr/source/browse/trunk/dict/trie.h?r=714 // The pattern list file should contain one pattern per line in UTF-8 > format. > // > // Each pattern can contain any non-whitespace characters, however only > the > // patterns that contain characters from the unicharset of the > corresponding > // language will be useful. > // The only meta character is '\'. To be used in a pattern as an ordinary > // string it should be escaped with '\' (e.g. string "C:\Documents" > should > // be written in the patterns file as "C:\\Documents"). > // This function supports a very limited regular expression syntax. One > can > // express a character, a certain character class and a number of times > the > // entity should be repeated in the pattern. > // > // To denote a character class use one of: > // \c - unichar for which UNICHARSET::get_isalpha() is true (character) > // \d - unichar for which UNICHARSET::get_isdigit() is true > // \n - unichar for which UNICHARSET::get_isdigit() and > // UNICHARSET::isalpha() are true > // \p - unichar for which UNICHARSET::get_ispunct() is true > // \a - unichar for which UNICHARSET::get_islower() is true > // \A - unichar for which UNICHARSET::get_isupper() is true > // > // \* could be specified after each character or pattern to indicate that > // the character/pattern can be repeated any number of times before the > next > // character/pattern occurs. > // > // Examples: > // 1-8\d\d-GOOG-411 will be expanded to strings: > // 1-800-GOOG-411, 1-801-GOOG-411, ... 1-899-GOOG-411. > // > // http://www.\n\*.com will be expanded to strings like: > // http://www.a.com http://www.a123.com ... > http://www.ABCDefgHIJKLMNop.com > // > // Note: In choosing which patterns to include please be aware of the > fact > // providing very generic patterns will make tesseract run slower. > // For example \n\* at the beginning of the pattern will make Tesseract > // consider all the combinations of proposed character choices for each > // of the segmentations, which will be unacceptably slow. > // Because of potential problems with speed that could be difficult to > // identify, each user pattern has to have at least kSaneNumConcreteChars > // concrete characters from the unicharset at the beginning. > > On Fri, Aug 30, 2013 at 9:10 AM, Quan Nguyen <[email protected]> wrote: > Try bazaar pattern matching and see if you will have better results. > > http://tesseract-ocr.googlecode.com/svn/trunk/doc/tesseract.1.html > > On Thursday, August 29, 2013 3:33:28 AM UTC-5, sam vara wrote: >> >> this is my first OCR project . I am trying to feed an image that is >> [email protected] i.e an email field. I have a charset restriction defined >> which is alphanumeric (A thru Z and a thru z and @_). When tesseract >> processes this image it outputs 'G' for the @ symbol and _ for '.'. I get >> back xyzG gmail_com. What is the way to solve this ? Should i define a more >> restrictive char set? >> >> Thanks >> > -- > -- > 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. > -- -- 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.
