Stefan Sobek Blog » pdf http://www.sobek.info/blog Writing about IT, Software Engineering, sports and other stuff Mon, 24 Jan 2011 12:50:08 +0000 http://wordpress.org/?v=2.9 en hourly 1 OCR under linux http://www.sobek.info/blog/2010/02/08/ocr-under-linux/ http://www.sobek.info/blog/2010/02/08/ocr-under-linux/#comments Mon, 08 Feb 2010 09:04:40 +0000 admin http://www.sobek.info/blog/?p=60 Imagine you have a pdf-file you want to make ocr-recognition. Take a scenario where you want to automatically let your linux pc do the job, e.g. in a folder.

I choose tesseract-ocr as ocr-programm. Easy to install and use and ok for my use. Unfortunately it takes only tif as input file type so that we have to convert the pdf to tif first.

To create a tif file with Ghostscript from pdf:

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gs -q -r300 -dBATCH -dNOPAUSE -sDEVICE=tiff24nc  -sOutputFile=Dokument2.tif Dokument1.pdf


Now start OCR-recognition with tesseract-ocr (maybe you have to install it).

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 tesseract Dokument2.tif doc.txt -l deu

-l deu means “Deutsch” for German language recognition.
-r300 means 300 DPI

Now it is easy to create a script which will automatically check a folder for new files and start ocr etc.

E.g. you can create a shell-script and start this shell script via cronjob. Maybe I will write an example here later.

]]> http://www.sobek.info/blog/2010/02/08/ocr-under-linux/feed/ 0 Create a pdf from manpages http://www.sobek.info/blog/2010/01/16/create-a-pdf-from-manpages/ http://www.sobek.info/blog/2010/01/16/create-a-pdf-from-manpages/#comments Sat, 16 Jan 2010 16:01:30 +0000 admin http://www.sobek.info/blog/?p=222 If you want to printout or save info from manpages simply type:

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man -t man | ps2pdf - > man.pdf
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