free open-source linux screenshot & ocr tool

Posted by Gryllida on Super User See other posts from Super User or by Gryllida
Published on 2012-12-07T00:09:14Z Indexed on 2012/12/07 5:09 UTC
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linux

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screen

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command

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pipe

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ocr

I'm looking for a tool which would be able to capture a screen region, pass it to OCR and put the result into clipboard.

"import ppm:- | gocr -i - | xclip -selection c" works, but gocr is unreliable: simple text on a webpage has errors. It is a clear font but the OCR tool always misses "r" and replaces it with underscore.
"import ppm:- | ocrad -i - | xclip -selection c" says "ocrad: maxval > 255 in ppm "P6" file."
tesseract needs an image file and does not accept piping input to it.
xfce4-screenshooter does not do OCR.
ABBYY Screenshot Reader is proprietary.
tessnet2 is freeware running on a proprietary platform.
Google Docs can OCR screenshots in a batch. But my data is confidential and better not put online.

Graphical interface solutions would be acceptable for this question, too.

There is a number of existing SuperUser questions about OCR. They fall in several categories.

Questions just about OCR without the "screenshot taking" part.
File processing OCR instead of screenshot.
Process files prior to running OCR.
OCR training.
- Training Tesseract-OCR for english language fonts

None of them answer this question.

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