News for hackers. Stuff that matters.
Re:Show HN: Convert scanned documents into searchable PDFs by raphman_ on Wednesday December 16, 2015 @01:55PM (#10746355)
Given that the OCR'ed PDFs use the "GlyphLessFont" font, it seems that tesseract [1] is used.

[1] https://github.com/tesseract-ocr/tesseract

Re:Show HN: Convert scanned documents into searchable PDFs by cfcef on Wednesday December 16, 2015 @02:44PM (#10746730)
I hope not. Tesseract delivers bad results on high quality scans, far below the same OCR quality achieved by services like Google Books.

What the OCR market needs is someone who will bring that level of OCR quality - or better - to the masses (perhaps some deep learning grad student with time to kill?), not yet another wrapper around Tesseract. We have those already!

Re:Show HN: Convert scanned documents into searchable PDFs by jiaweihli on Wednesday December 16, 2015 @03:48PM (#10747215)
Have you looked into ocropy[0]?

Here's a nice intro[1] that later talks about how it achieves higher accuracy using an LSTM model[2].

[0] https://github.com/tmbdev/ocropy

[1] http://www.danvk.org/2015/01/09/extracting-text-from-an-imag...

[2] http://www.danvk.org/2015/01/11/training-an-ocropus-ocr-mode...

Re:Show HN: Convert scanned documents into searchable PDFs by cfcef on Wednesday December 16, 2015 @04:52PM (#10747637)
I have not. It sounds interesting but raw and unsuitable for end-users. I hope the quality improves and they can get it packaged up in a way that existing document scanners can plug into easily.
Re:Show HN: Convert scanned documents into searchable PDFs by jahewson on Wednesday December 16, 2015 @06:48PM (#10748346)
Note that the primary author of ocropy (formerly ocropus) works at Google.
Re:Show HN: Convert scanned documents into searchable PDFs by acdha on Wednesday December 16, 2015 @04:42PM (#10747574)
Is the problem really Tesseract or the fact that it doesn't have a robust front-end performing segmentation, de-skewing, better binarization, etc? I've heard that Google Books is actually using the Tesseract engine but has seen better results in part from better training but mostly from a more advanced system breaking each page into the blocks of text which are actually OCRed.
Re:Show HN: Convert scanned documents into searchable PDFs by mynewtb on Wednesday December 16, 2015 @02:49PM (#10746766)
I have had great result using tesseract via gimagereader. Are you sure your configuration is good?
Re:Show HN: Convert scanned documents into searchable PDFs by random778 on Wednesday December 16, 2015 @05:18PM (#10747796)
Possible to upload an example image + result?