I'm using tesseract-ocr for a long time, but, it doesn't work so well. I found this site (http://www.onlineocr.net/default.aspx) that works great.

Someone knew another OCR software, maybe free?

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feels like spam for the linked site – Joel Coehoorn Jun 30 '11 at 3:56
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2 Answers

up vote 1 down vote accepted

Among open source - tesseract is the best you can find. Here's comparison:

http://www.scanstore.com/Scanning/Document_Imaging/Software/OCR_Software/

If it's quality is still not enough for you, look for commertial tools. There is lot of them for different tasks. Here's first what Google gives for "OCR Software comparison":

http://www.scanstore.com/Scanning/Document_Imaging/Software/OCR_Software/

However, you better do your own research based on task you are going to solve.

Regards, Andrey

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I've found Tesseract to have one of the highest recognition rates myself, but I've also taken the time to train it to recognize a whole pile of additional fonts. Take a look at http://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract3 for how to do that.

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