Hey, Given the input file 2000.pdf, and the following code, ...
# first, conversion to TIFF with ghostscript ghostscript -o 2000_gs.tif -sDEVICE=tiffgray -r720x720 -g6120x7920 - sCompression=lzw 2000.pdf # then, rotation with imagemagick convert 2000_gs.tif -rotate 89.4 -background white -alpha Off 2000_rotated. tif # then, OCR with tesseract, using suggested parameters tesseract 2000_rotated.tif 2000_readable_gs_custom -c load_system_dawg=0 -c load_freq_dawg=0 -c textord_tablefind_recognize_tables=1 -c textord_tabfind_find_tables=1 pdf ...the quality of the OCR is really poor - hardly 30% of the text is searchable in 2000_readable_gs_custom.pdf. I have uploaded all the files to https://www.sendspace.com/filegroup/dGA6ojm%2BQ4tZ6gdkyuSM0xSIUD8P2vbB When I OCR the same file with Adobe Acrobat Professional, I get almost 100% accuracy. Of course I'd like to do it rather with FOSS than with a commercial product, so do you have any hints on how I could mitigate those problems? Thanks a lot, Timo -- 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 https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/520ede86-b034-4f41-92bf-2735ea043f6d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
