This is leptonica issue ;-) Leptonica use stub/dummy file for not presented support[1]. So message "Error in pixReadStreamTiff: function not present" you should read as:"you did not compiled leptonica with (lib)tiff support you want to use it for reading tiff file"...
[1] https://tpgit.github.io/Leptonica/tiffiostub_8c_source.html Zdenko On Wed, Apr 22, 2015 at 1:18 AM, SDSL <[email protected]> wrote: > Hi, > I need to build tesseract-ocr (https://code.google.com/p/tesseract-ocr/) > from source in order to OCR some PDF files. Many people use "convert" of > imagemagick to first convert a PDF to a TIFF then resort to Tesseract to > OCR the TIFF to a text file. > > Since Tesseract depends on the Leptonica Image Processing Library ( > http://leptonica.com/), i had to build that from source as well. Our OS > distro is the old RHEL 6.2. In our computing environment, most > utilities/tools are not installed at the typical locations (/usr/bin, > /usr/local, etc.). According to one of the README files, I don't need the > JPEG/JPG & PNG headers/libs unless I need to write to a PDF so i did not > yank them in (from our non-standard locations) while building Leptonica. > > When I fired off Tesseract as in > /path/to/somewhere/install/tesseract-ocr_3.02.02/bin/tesseract t.tiff > output > I got the following error message > Tesseract Open Source OCR Engine v3.02.03 With Leptonica > Error in findTiffCompression: function not present > Error in pixReadStreamTiff: function not present > Error in pixReadStream: tiff: no pix returned > Error in pixRead: pix not read > Unsupported image type > > I am puzzled since the 2 missing functions are present in the shared lib > according to my investigation below ... > > From ldd of the Tesseract ELF binary: > % ldd /path/to/somewhere/install/tesseract-ocr_3.02.02/bin/tesseract > ... > liblept.so.4 => > /path/to/somewhere/install/Leptonica_1.71/lib/liblept.so.4 > (0x00007fb10b4e6000) > > And also the LD_LIBRARY_PATH setting (I know LD_LIBRARY_PATH is to be > frowned upon but i only used it here as a temporary hack): > % echo $LD_LIBRARY_PATH > > /path/to/somewhere/install/tesseract-ocr_3.02.02/lib:/path/to/somewhere/install/Leptonica_1.71/lib > > The 2 functions that appeared in the error output above, namely > findTiffCompression & pixReadStreamTiff, DO EXIST in the share lib: > % nm -D /path/to/somewhere/install/Leptonica_1.71/lib/liblept.so.4 | > grep findTiffCompression > 00000000001a0140 T findTiffCompression > > % nm -D /path/to/somewhere/install/Leptonica_1.71/lib/liblept.so.4 | > grep pixReadStreamTiff > 00000000001a03e0 T pixReadStreamTiff > > What am I missing here? > > Thanks for reading. > > -- > 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/90d8d0e8-ae7f-43af-8485-24826d78c10e%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/90d8d0e8-ae7f-43af-8485-24826d78c10e%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/CAJbzG8xOqVCpGknqLxpcExQ4c%2BqkKnrmRuMYSrbRGdNPMRQ7Yw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
