awesome-ocr

tesseract

The definitive Open Source OCR engine

EasyOCR

OCR engine built on PyTorch by JaidedAI,

ocropus

OCR engine based on LSTM,

ocropus 0.4

Older v0.4 state of Ocropus, with tesseract 2.04 and iulib, C++

kraken

Ocropus fork with sane defaults

OCR engine under the GNU Public License led by Joerg Schulenburg

The GNU OCR

ocular

Machine-learning OCR for historic documents

SwiftOCR

fast and simple OCR library written in Swift

attention-ocr

OCR engine using visual attention mechanisms

The RWTH Aachen University Optical Character Recognition System

simple-ocr-opencv

and its - A simple pythonic OCR engine using opencv and numpy

Calamari

OCR Engine based on OCRopy and Kraken

doctr

A seamless & high-performing OCR library powered by Deep Learning

Open source OCR in C

CuneiForm OCR was developed by Cognitive Technologies

an experimental Java OCR (image-to-text) application

An omnifont OCR software for KDE

Modular Optical Character Recognition Software

o.c.r. easy

A GTK 2 tool for pattern matching

hebOCR

Hebrew character recognition library (previously named hocr, see )

hocr-tools

Tools for doing various useful things with hOCR files,

hocr-spec

hOCR 1.2 specification

ocr-transform

CLI tool to convert between hOCR and ALTO,

hocr-parser

hOCR Specification Python Parser

hOCRTools

hOCR to ALTO conversion XSLT

ALTO XML Schema

XML Schema and development of the ALTO XML format

ALTO XML Documentation

Documentation and use cases for ALTO

alto-tools

Various tools to work with ALTO files, Python

AbbyyToAlto

PHP script converting from Abbyy 6 to ALTO XML

TEI-OCR

TEI customization for OCR generated layout and content information

Best Practices for TEI in Libraries

METS/TEI-based GDZ document format

PAGE-XML Schema

XML schema of the PAGE XML format along with documentation and examples

XML schema very similar to PAGE XML that has some additional features

py-pagexml

Python library for handling PAGE XML and OPF files

OCRmyPDF

OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched

Pdf2PdfOCR

A tool to OCR a PDF (or supported images) and add a text "layer" (a "pdf sandwich") in the original file making it a searchable PDF. GUI included. Tesseract and cuneiform supported

Project manager interface for Ocropy, see also

tesseract-recognize

Tesseract-based tool that outputs result in Page XML format ( )

moz-hocr-editor

Firefox Addon for editing hOCR files

qt-box-editor

QT4 editor of tesseract-ocr box files

ocr-gt-tools

Client-Server application for editing OCR ground truth

Paperwork

Using scanners and OCR to grep paper documents the easy way

Paperless

Scan, index, and archive all of your paper documents

gImageReader

gImageReader is a simple Gtk/Qt front-end to tesseract-ocr

A Java/.NET GUI frontend for Tesseract OCR engine, including a graphical Tesseract editor

PoCoTo

Fast interactive batch corrections of complete OCR error series in OCR'ed historical documents

GTK graphical user interface that allows the users to correct characters or bounding boxes, ODT export and more

PRImA PAGE Viewer

Java based viewer for PAGE XML files (layout + text content). Also supports ALTO XML, FineReader XML, and HOCR

LAREX

A semi-automatic open-source tool for Layout Analysis and Region EXtraction on early printed books

archiscribe

Web application for transcribing OCR ground truth from Archive.org. Deployed instance available at , results are available in

nw-page-editor

Simple app for visual editing of Page XML files. Provides desktop and versions

NoiseRemove.java in MathOCR

Java implementation of Adaptive degraded document image binarization by B. Gatos , I. Pratikakis, S.J. Perantonis

binarize.c in ZBar

C implementations of two binarization algorithms, based on Sauvola

typeface-corpus

A repository for typefaces to train Tesseract and OCRopus for natural history collections and digital humanities

binarizewolfjolion

Comparison of binarization algorithms

crop_morphology.py in oldnyc

Cropping a page to just the text block

Shell one-liner/script to clean up and beautify photos of whiteboards

Fred's ImageMagick script - Processes a scanned document of text to clean the text background

Fast O(1) local contrast optimization

Open OCR

Run Tesseract in Docker containers

tesseract-web-service

An implementation of RESTful web service for tesseract-OCR using tornado

docker-ocropy

A Docker container for running the

ABBYY Cloud OCR SDK Code samples

Code samples for using the proprietary commercial ABBYY OCR API

nidaba

An expandable and scalable OCR pipeline

gamera

A meta-framework for building document processing applications, e.g. OCR

ocr-tools

Project to provide CLI and web service interfaces to common OCR engines

ocrad-docker

Run the OCR engine in a docker container

kraken-docker

Run the OCR engine in a docker container

Free Online OCR up to 2.000 pages per month and OCR API by [@atraining], see (code is not open)

Free Online OCR and OCR API by based on Tesseract (code is not open)

OCR4all

Provides OCR services through web applications. Included Projects: , , and

with a

isri-ocr-evaluation-tools

further development by (2015, 2016)

ancientgreekocr-evaluation-tools

further development by (2013, 2014)

ocrevalUAtion

Cross-format evaluation, CLI and GUI

ngram-ocr-eval

Brute and simple OCR evaluation using ngrams

quack

Quality-Assurance-tool for scans with corresponding ALTO-files

tesseract-ocr

A Crystal wrapper for tesseract-ocr

tesseract_ocr

Elixir library wrapping the tesseract executable

gosseract

Golang OCR library, wrapping Tesseract-ocr

Tess4J

Java Native Access bindings to Tesseract

tess-two

Tools for compiling Tesseract on Android and Java API

tesseract for .net

A .Net wrapper for tesseract-ocr

TTesseractOCR4

Object Pascal binding for tesseract-ocr 4.x

Tesseract OCR for PHP

Tesseract PHP bindings

pytesseract

A Python wrapper for Google Tesseract

pyocr

A Python wrapper for Tesseract and Cuneiform

ocrodjvu

A library and standalone tool for doing OCR on DjVu documents, wrapping Cuneiform, gocr, ocrad, ocropus and tesseract

tesserocr

A Python wrapper for the tesseract-ocr API

ocracy

pure javascript lstm rnn implementation based on ocropus

gocr.js

Javascript port (emscripten) of gocr

ocrad.js

Javascript port (emscripten) of ocrad

tesseract.js

Javascript port (emscripten) of Tesseract

node-tesseract-ocr

A simple wrapper for the Tesseract OCR package

node-tesseract-native

C++ module for node providing OCR with tesseract and leptonica

rtesseract

Ruby library wrapping the tesseract and imagemagick executables

ruby-tesseract

Native Tesseract bindings for Ruby MRI and JRuby

ocr_space

API wrapper for free ocr service ocr.space. Includes CLI

tesseract.rs

Rust bindings for tesseract OCR

Productive and safe Rust bindings/wrappers for tesseract and leptonica

tesseract

R bindings for tesseract OCR

Tesseract OCR iOS

Swift and Objective-C wrapper for Tesseract OCR

SwiftOCR

Fast and simple OCR library written in Swift. Optimized for recognizing short, one line long alphanumeric codes

glyph-miner

A system for extracting glyphs from early typeset prints

ocrodeg

Document image degradation for OCR data augmentation

archiscribe-corpus

>4,200 lines transcribed from 19th Century German prints via

CIS OCR Test Set

2 example documents each in German/Latin/Greek with ground truth for

Rescribe

Transcriptions of Caroline Minuscule Manuscripts

Corpora from

150 pages of three medieval manuscripts

EarlyPrintedBooks

~8,800 lines from several early printed books

EEBO-TCP

25,363 EEBO documents transcribed by

ECCO-TCP

2,188 ECCO documents transcribed by

eMOP-TCP

2,188 ECCO-TCP documents, cleaned up by

Evans-TCP

4,977 Evans documents transcribed by

Finnish Digitised Historical Newspapers, , (free) required,

FROC-MSS

4 Old French Medieval Manuscripts

764 Spanish manuscript pages, (free) required

Ground Truth for German Fraktur and Early Modern Latin

imagessan

Sanskrit images & ground truth (Devanagari script)

2,418 pages from the Biodiversity Heritage Library,

294 pages from the British Library, (free) required

215 pages from the National Library of Spain, (free) required,

151 pages from the National Library of France, (free) required

142 pages from the National Library of the Netherlands

187 pages from the Czech National Library, (free) required

19 pages from the National Library of Bulgaria, (free) required

209 pages from the National Library of Slovenia, (free) required

478 pages from four Polish digital libraries,

LascivaRoma/lexical

Transcription of 19th century lexical resources for Latin learning

9m synthetic images covering 90k English words

19,000 pages Swiss Alpine Club yearbooks transcribed via

180 pages of German historical prints from

OCR_GS_Data

Double-checked Arabic Gold Standard from

old-books

322 old books from

528 pages historic newspapers from , (free) required

853 Spanish manuscript pages, (free) required

Toebler-OCR

(Kraken) Ground Truth transcription of few pages of the Tobler-Lommatzsch: Altfranzösisches Wörterbuch

List of tools software projects related, some related to OCR

List of OCR-related academic articles in the context of the project

Collection of 34 papers on OCR

List of Digital Humanities-related projects in Europe, some related to OCR

by

Tesseract Blends Old and New OCR Technology

(2016)

(2014)

(2015)

(2015)

Ocropus Wiki: Compute errors and confusions

(2016)

Ocropus Wiki: Working with Ground Truth

(2016)

(2016)

(2013)

-

How to work with OCR from PDFs in the

(2016)

(2017)

(2017)

(2016)

(2016)

(2016) . Several image processing how-tos (Python based), particularly:

( )

( )

( )

(2017) overview of the state of the art in open source OCR and related technologies (binarisation, deskewing, layout recognition, etc.), lots of example images and information on the project

(2018)

(2019) A reflection/criticism on OCR quality, OCR pitfalls in Fraktur fonts

abbyy-finereader-ocr-senate

Using OCR to parse scanned Senate Financial Disclosure forms

cvOCR

An OCR system for recognizing resume or cv text, implemented in Python and C and based on tesseract

MathOCR

A printed scientific document recognition system,

(2003) Breuel

(2006) Gatos, Pratikakis, Perantonis

(2007) Gupta

(2007) Dantrey

(2012) Yousefi, Breuel

(2013) Breuel, Ul-Hasan, Mayce Al Azawi. Shafait

(2013) Ul-Hasan, Breuel

(2013) Ul-Hasan, Ahmed, Rashid, Shafait, Breuel

(2014) Springmann, Najock, Morgenroth, Schmid, Gotscharek, Fink

(2014) Evershed, Fitch

(2015) Bilansky

(2015) Breuel

(2015) Simistira, Ul-Hassan, Papavassiliou, Basilis Gatos, Katsouros, Liwicki

(2015) Karayil, Ul-Hasan, Breuel

(2015) Ul-Hasan, Afzal, Shfait, Liwicki, Breuel

(2016) Romanov, Miller, Savant, Kiessling

OpenArabic/OCR_GS_Data

using for ground truth data

(2016) Springmann, Lüdeling

(2016) Springmann, Fink, Schulz

(2016) Ul-Hasan -- Ph.D Thesis

(2016) Dengel, Ul-Hasan, Bukhari

(2016) Lee, Osindero

(2015/2017) , Hastie

see also , , ,

(2018) , Leifert, Strauß, Labahn. Code available at