This is known issue - try current code from git repository. It should be fixed.
Zdenko On Fri, Sep 19, 2014 at 2:38 PM, Frank Siegert <[email protected] > wrote: > Dear all, > > I have been testing tesseract to embed OCR in scanned PDF documents, and > it works phenomenally well in recognizing the text. > > Now I noticed one slightly disturbing issue just by chance when comparing > the original input image and the PDF file: A number of straight lines that > are present in the input image have disappeared completely in the PDF (some > of the are horizontal rules, others are lines in a logo). Since I wanted to > use tesseract to produce completely unmodified documents with only the OCR > text layer added, this would be a problem for me. I have uploaded a test > image for this to http://cern.ch/fsiegert/tmp/tesseract-test.tif and here > is the command I used on it: > >> $ tesseract -l deu tesseract-test.tif tesseract-test pdf >> Tesseract Open Source OCR Engine v3.03 with Leptonica >> OSD: Weak margin (6.96) for 162 blob text block, but using orientation >> anyway: 1 >> $ tesseract --version >> tesseract 3.03 >> leptonica-1.71 >> libgif 5.1.0 : libjpeg 8d : libpng 1.6.12 : libtiff 4.0.3 : zlib 1.2.8 >> : libwebp 0.4.1 > > > This results in http://cern.ch/fsiegert/tmp/tesseract-test.pdf, which is > missing the straight horizontal lines and the ones in the logo. Is this > line-removal done on purpose and can it be disabled? > > Cheers, > Frank > > PS: I have removed much more text from the document for privacy reasons, > but the same happens when the document is complete with text. > > -- > 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/9d3455ba-6c17-4c10-bc09-e5ee5b911ad0%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/9d3455ba-6c17-4c10-bc09-e5ee5b911ad0%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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/CAJbzG8wbwxtiFKmhFr0pLrCwq_-Qy48gJcJxyU9ug3%2BSy1040A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
