tesseract + emscripten?

[Nick Williams]

Hi all,

I've had an idea for a while about utilising getUserMedia/file input in a browser to capture a picture of text, and then use OCR to get the text. It seems there are no readily available JS OCR libs, so I've started thinking about using emscripten to compile tesseract to JS. 

I'd just like to know is this viable? Modern browsers can create binary blobs, so I assume this would be possible, providing the tesseract API supports it?

Thanks in advance,

Nick

[Vanuan]

There's no other way to know than to try.

[Sven Pedersen]

Here is a tesseract interface via NodeJS:

https://github.com/desmondmorris/node-tesseract

But I think you're a psycho! :-)

Running OCR in a browser would be excessively resource intensive at present. Perhaps send the blob to your server (making sure to limit its size) and send back an asynchronous JSON text reply? There are some OCR server systems.

Google Docs API is an option:

http://googlesystem.blogspot.com/2009/09/google-docs-ocr.html

Just some thoughts. Many of us would like to hear what you can come up with.

--Sven

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[Nick Williams]

:D Pyschotic I may be, but Atwood's law compels me to do it! I'm committed to getting it working in the client, I don't want these fancy pants node bindings - they're cheating if you ask me! 

I'll report back if/when I have made some headway with this. I've been put in touch with one of the emscripten guys by Brendan Eich (!!) so maybe the ball will get rolling :)

[Jochen Brüggemann]

Any news here? I would be very interested in your result, because in our business application sending the file to the server is no option because of security/privacy issues. So client-side OCR in JS would be great.

[Jean Millerat]

Hey there,

Le mardi 4 novembre 2014 09:21:38 UTC+1, Jochen Brüggemann a écrit :

Any news here? I would be very interested in your result, because in our business application sending the file to the server is no option because of security/privacy issues. So client-side OCR in JS would be great.

We were in a similar situation and found out how to compile tesseract with emscripten. Our howto documentation is available from this post on my blog :

http://www.akasig.org/2016/03/14/how-to-run-tesseract-from-web-browsers-with-the-help-of-emscripten/

Enjoy !

--
Jean