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Questions tagged [ocr]

OCR (Optical character recognition) is the conversion of an image of characters into a machine-readable encoded text. Use this tag to indicate questions involving this type of conversion or software that performs OCR. When possible indicate the source and target of the conversion.

2
votes
0answers
28 views

Replace Scanned Text with OCRed Text in PDF

I have a scanned book as a PDF. When viewed in Evince, the book appears as it did when scanned, with old fashioned fonts that appear as they were scanned. However, Evince recognises the letters as ...
15
votes
3answers
10k views

how to OCR a pdf file and get the text stored within pdf?

first, apologies if this has been asked before - I searched for a while through the existing posts, but could not find support. I am interested in a solution for Fedora to OCR a multipage non-...
1
vote
2answers
57 views

How do I update this recursive directory file search for input and name outputs to handle the below case

I am updating a script that recursively goes through a directory and ocrs the pdf and updates the pdf. In its simple version, it works. ocrmypdf -l vie --deskew --clean --force-ocr --sidecar ...
25
votes
5answers
13k views

How to use OCR from the command line in Linux?

I have several thousand pages of scanned book pages. Each page is saved individually as a JPG. The writing is clear, but fonts vary, and the pages do include pictures and illustrations. I need to ...
1
vote
0answers
121 views

Extract hardcoded subtitles

I wanted to know if there is a way to extract hardcoded subtitles via OCR, should I do some image processing after extracting the frames in order to use tesseract afterwards? I have tried to extract ...
14
votes
5answers
3k views

OCR on Linux systems [closed]

I have always found OCR technology to be behind on open source systems. I've also watched the Ocropus project since its infancy. I've tried what I've heard is the best OCR engine available for Linux,...
2
votes
1answer
376 views

Where I can get Tesseract binaries for Debian 6 64bit?

I used apt-get to install Tesseract but it's not really working. Maybe I could just download binaries somewhere, put in a dir and use this way? What's wrong with my Tesseract now: tesseract --help ...
3
votes
2answers
1k views

How to find all images containing any text?

I got a lot of images, and I need to find, which of them contain any text in English (to delete them). Is it possible to do it automatically?
4
votes
0answers
460 views

Delete OCR from PDF

I have PDF file containing corrupted OCR. It is a bunch of handwritten pages with a lot of symbols and abbreviations, and I got this file with an automatically generated OCR. How can I remove the ...
4
votes
1answer
786 views

tesseract: is it possible to change font output in OCRed pdf?

Following up on how to OCR a pdf file and get the text stored within pdf? I have successfully produced OCRed pdf pages. In Evince, however, the letters are not shown; by this I mean that I cannot see ...
0
votes
2answers
368 views

OCR software for equations to get LaTeX file

First of all, I apologize if this is not the right place to ask this, but I couldn't think of anywhere else (maybe Stack Overflow?). Anyway, I'm looking for a Optical Character Recognition software (...
20
votes
4answers
12k views

Is there some sort of PDF to text -converter?

I need PDF files to text so I can search over them in bulk from commandline. Is there some converter for Ubuntu, OBSD or similar distro? Perhaps related post, OCR with ubuntu here.
3
votes
1answer
1k views

How can I rasterize all of the text in a PDF?

You know when you have a pdf, which is a scan of a document and it's a really huge file, because it just stores the picture of the scanned document? And there are OCR tools which can help you to ...
1
vote
0answers
79 views

OCR for getting text from an image. Error management

I want to use an OCR program to obtain some text in an image. The text is not black on white so I don't know if it will be possible. wget -q -O image http://4.bp.blogspot.com/-mIE4JlppKMU/T9_mxKR__wI/...
0
votes
1answer
344 views

Image (having text-and-numbers) to text-file matching [:alnum:] nicely with some Unix -tool?

Suppose a photograph with text and numbers. I want to manage it in my editor with tools such as grep, standard text-processing things such as Vim's block-highlighting and also more advanced things ...
3
votes
1answer
893 views

Linux equivalent of GraphClick?

Is there a piece of Linux software that does what GraphClick does in Mac OS X? That is, is there a Linux software that "is a graph digitizer software which allows to automatically retrieve the ...
2
votes
0answers
66 views

OCR that outputs probability data

I would like to convert printed books I own into audio by scanning them with OCR and then running the text through a TTS engine. These titles are not available as ebooks. Since OCR can make small ...
3
votes
2answers
850 views

Create custom wordlist

I want to create a custom list of (scientific) words for purposes like spell checking and OCR based on my collection of scientific papers in pdf format. Using pdftotext I can easily create a text file ...
4
votes
1answer
182 views

De-obfuscate a picture with statistical information?

I need to get this kind of information into numbers, how? Perhaps related https://dsp.stackexchange.com/questions/1054/how-do-i-recover-the-signal-from-an-ecg-image https://dsp.stackexchange.com/...
4
votes
3answers
327 views

sed one-liner to replace word-medial capitals

I used OCR to turn some scans into plaintext, but unfortunately the letters 'fi' which are commonly joined in some fonts, got read in as capital W's. Now I need to replace all the W's with 'fi', and ...
0
votes
1answer
59 views

Writing to picture which is scanned document

I have a scanned contract and I need to change only a few names and dates in the contract. It's easy to scan the document but impossible to ocr the document and open in *.doc format. Is there an ...