Hi Ryan,
I run in the same problem. Do you have solved it?
Best regards,
Chris
On Wednesday, September 17, 2014 7:26:02 PM UTC+2, Ryan Johnson wrote:
>
> Hi all,
>
> I'm having problems with tesseract-ocr since upgrading to Ubuntu 14.04
> LTS. When I use either hocr or the internal tesseract output for searchable
> pdfs I get an oversized font that fills the page too quickly and does not
> follow the text in the image.
>
> I scan the images as tiffs at 300 dpi, then clean up the images using
> ScanTailor which outputs it as a tiff at 300 dpi as well, dimensions
> slightly altered. After that I perform the ocr. The output is there, but
> the font is not aligned properly to the image, as stated above it makes the
> font too large and so the text is cut off before the end, and the missing
> text does not come up in a search.
>
> I'm using the stock tesseract package for Ubuntu 14.04. I tried following
> the instructions to build the training packages but it errorred out.
>
> Version info:
> tesseract --version
> tesseract 3.03
> leptonica-1.70
> libgif 4.1.6(?) : libjpeg 8d : libpng 1.2.50 : libtiff 4.0.3 : zlib
> 1.2.8 : webp 0.4.0
>
> Here is a sample of my script for the ocr process using the output from
> ScanTailor:
> #!/bin/bash
> # Run OCR on multiple PDF files and create a new pdf with the
> # extracted text in hidden layer. Requires tesseract, hocr2pdf, gs.
> # NOTE: hocr2pdf is no longer required as of tesseract-ocr 3.03
> # Usage: ./makeit output.pdf
>
> set -e
> output="$1"
> dir=`pwd`
>
> # OCR each page individually and convert into PDF
> for page in "$dir"/*page*.tif
> do
> base="${page%.tif}"
> # tesseract "$page" "$base" -l isl hocr
> tesseract "$page" "$base.pdf" -l isl # I have also tried adding
> -psm 4 here
> # Tesseract now outputs searchable pdf on its own
> # hocr2pdf -i "$page" -o "$base.pdf" < "$base.hocr"
> done
>
> # combine the pages into one PDF
> gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile="$output"
> "$dir"/*page*.pdf
>
> If anybody could please point out any error I have made or provide a
> solution to this problem I would be very grateful. I am trying to get a
> copy of a document to a professor of mine, where the original electronic
> version of the document was lost. Searchable text is a desirable attribute
> of the final result for her.
>
>
> Regards
>
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