Seems to work very well. I wonder about the technics they use. I asked about exactly this a while ago here: http://metaoptimize.com/qa/questions/2097/ocr-lib-f

Seems to work very well. I wonder about the technics they use. I asked about exactly this a while ago here: http://metaoptimize.com/qa/questions/2097/ocr-lib-for-math-formulas http://metaoptimize.com/qa/questions/2097/ocr-lib-for-math-f... The answers at that point were quite limited. The Tesseract OCR engine was just not made to recognize such structure. There are some other closed solutions, though.