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Awesome OCR

Deskewing and Dewarping

Segmentation

Line Segmentation

Character Segmentation

Word Segmentation

Document Segmentation

Form Segmentation

Handwritten

Table detection

Language detection

  • lingua - The most accurate natural language detection library for Java and other JVM languages, suitable for long and short text alike
  • langdetect
  • whatthelang - Lightning Fast Language Prediction rocket
  • wiki-lang-detect

Text detection and localization

  • DB
  • DeepReg
  • CornerText - paper:2018) - Multi-Oriented Scene Text Detection via Corner Localization and Region Segmentation
  • RRPN - (paper:2018) - Arbitrary-Oriented Scene Text Detection via Rotation Proposals
  • MASTER-TF - (paper:2021) - TensorFlow reimplementation of "MASTER: Multi-Aspect Non-local Network for Scene Text Recognition" (Pattern Recognition 2021).
  • MaskTextSpotterV3 - (paper:2020) - Mask TextSpotter v3 is an end-to-end trainable scene text spotter that adopts a Segmentation Proposal Network (SPN) instead of an RPN.
  • TextFuseNet - (paper:2020) A PyTorch implementation of "TextFuseNet: Scene Text Detection with Richer Fused Features".
  • SATRN- (paper:2020) - Official Tensorflow Implementation of Self-Attention Text Recognition Network (SATRN) (CVPR Workshop WTDDLE 2020).
  • cvpr20-scatter-text-recognizer - (paper:2020) - Unofficial implementation of CVPR 2020 paper "SCATTER: Selective Context Attentional Scene Text Recognizer"
  • seed - ([paper:2020[https://arxiv.org/pdf/2005.10977.pdf]) - This is the implementation of the paper "SEED: Semantics Enhanced Encoder-Decoder Framework for Scene Text Recognition"
  • vedastr - A scene text recognition toolbox based on PyTorch
  • AutoSTR - (paper:2020) Efficient Backbone Search for Scene Text Recognition
  • Decoupled-attention-network - (paper:2019) Pytorch implementation for "Decoupled attention network for text recognition".
  • Bi-STET - (paper:2020) Implementation of Bidirectional Scene Text Recognition with a Single Decoder
  • kiss - (paper:2019
  • Deformable Text Recognition - (paper:2019)
  • MaskTextSpotter - (paper:2019)
  • CUTIE - (paper:2019
  • AttentionOCR - (paper:2019)
  • crpn - (paper:2019)
  • Scene-Text-Detection-with-SPECNET - Repository for Scene Text Detection with Supervised Pyramid Context Network with tensorflow.
  • Character-Region-Awareness-for-Text-Detection
  • Real-time-Scene-Text-Detection-and-Recognition-System - End-to-end pipeline for real-time scene text detection and recognition.
  • ocr_attention - Robust Scene Text Recognition with Automatic Rectification.
  • masktextspotter.caffee2 - The code of "Mask TextSpotter: An End-to-End Trainable Neural Network for Spotting Text with Arbitrary Shapes".
  • InceptText-Tensorflow - An Implementation of the alogrithm in paper IncepText: A New Inception-Text Module with Deformable PSROI Pooling for Multi-Oriented Scene Text Detection.
  • textspotter - An End-to-End TextSpotter with Explicit Alignment and Attention
  • RRD - RRD: Rotation-Sensitive Regression for Oriented Scene Text Detection.
  • crpn - Corner-based Region Proposal Network.
  • SSTDNet - Implement 'Single Shot Text Detector with Regional Attention, ICCV 2017 Spotlight'.
  • R2CNN - caffe re-implementation of R2CNN: Rotational Region CNN for Orientation Robust Scene Text Detection.
  • RRPN - Source code of RRPN ---- Arbitrary-Oriented Scene Text Detection via Rotation Proposals
  • Tensorflow_SceneText_Oriented_Box_Predictor - This project modify tensorflow object detection api code to predict oriented bounding boxes. It can be used for scene text detection.
  • DeepSceneTextReader - This is a c++ project deploying a deep scene text reading pipeline with tensorflow. It reads text from natural scene images. It uses frozen tensorflow graphs. The detector detect scene text locations. The recognizer reads word from each detected bounding box.
  • DeRPN - A novel region proposal network for more general object detection ( including scene text detection ).
  • Bartzi/see - SEE: Towards Semi-Supervised End-to-End Scene Text Recognition
  • Bartzi/stn-ocr - Code for the paper STN-OCR: A single Neural Network for Text Detection and Text Recognition
  • beacandler/R2CNN - caffe re-implementation of R2CNN: Rotational Region CNN for Orientation Robust Scene Text Detection
  • HsiehYiChia/Scene-text-recognition - Scene text detection and recognition based on Extremal Region(ER)
  • R2CNN_Faster-RCNN_Tensorflow - Rotational region detection based on Faster-RCNN.
  • corner - Multi-Oriented Scene Text Detection via Corner Localization and Region Segmentation
  • Corner_Segmentation_TextDetection - Multi-Oriented Scene Text Detection via Corner Localization and Region Segmentation.
  • TextSnake.pytorch - A PyTorch implementation of ECCV2018 Paper: TextSnake: A Flexible Representation for Detecting Text of Arbitrary Shapes
  • AON - Implementation for CVPR 2018 text recognition Paper by Tensorflow: "AON: Towards Arbitrarily-Oriented Text Recognition"
  • pixel_link - Implementation of our paper 'PixelLink: Detecting Scene Text via Instance Segmentation' in AAAI2018
  • seglink - An Implementation of the seglink alogrithm in paper Detecting Oriented Text in Natural Images by Linking Segments (=> pixe_link)
  • SSTD - Single Shot Text Detector with Regional Attention
  • MORAN_v2 - MORAN: A Multi-Object Rectified Attention Network for Scene Text Recognition
  • Curve-Text-Detector - This repository provides train＆test code, dataset, det.&rec. annotation, evaluation script, annotation tool, and ranking table.
  • HCIILAB/DeRPN - A novel region proposal network for more general object detection ( including scene text detection ).
  • TextField - TextField: Learning A Deep Direction Field for Irregular Scene Text Detection (TIP 2019)
  • tensorflow-TextMountain - TextMountain: Accurate Scene Text Detection via Instance Segmentation
  • Bartzi/see - Code for the AAAI 2018 publication "SEE: Towards Semi-Supervised End-to-End Scene Text Recognition"
  • bgshih/aster - Recognizing cropped text in natural images.
  • ReceiptParser - A fuzzy receipt parser written in Python.
  • vedastr

ABCNet paper:2020

CRAFT paper:2019

FOTS paper:2018

  • FOTS - An Implementation of the FOTS: Fast Oriented Text Spotting with a Unified Network.
  • FOTS_OCR

TextBoxes++ paper:2018

PSENet paper:2018

  • tensorflow_PSENet - This is a tensorflow re-implementation of PSENet: Shape Robust Text Detection with Progressive Scale Expansion Network
  • PAN-PSEnet
  • PSENet - Shape Robust Text Detection with Progressive Scale Expansion Network.

EAST paper:2017

TextBoxes paper:2016

CTPN paper:2016

Video Text Spotting

Font detection

  • typefont - The first open-source library that detects the font of a text in a image.

Optical Character Recognition Engines and Frameworks

Awesome lists

Proprietary OCR Engines

Cloud based OCR Engines (SaaS)

File formats and tools

  • nw-page-editor - Simple app for visual editing of Page XML files
  • hocr
  • alto
  • PageXML
  • ocr-fileformat - Validate and transform various OCR file formats
  • hocr-tools - Tools for manipulating and evaluating the hOCR format for representing multi-lingual OCR results by embedding them into HTML.

Datasets

Data augmentation and Synthetic data generation

Pre OCR Processing

Post OCR Correction

Benchmarks

misc

  • ocrodeg - a small Python library implementing document image degradation for data augmentation for handwriting recognition and OCR applications.
  • scantailor - Scan Tailor is an interactive post-processing tool for scanned pages.
  • jlsutherland/doc2text - help researchers fix these errors and extract the highest quality text from their pdfs as possible.
  • mauvilsa/nw-page-editor - Simple app for visual editing of Page XML files.
  • Transkribus - Transkribus is a comprehensive platform for the digitisation, AI-powered recognition, transcription and searching of historical documents.
  • http://projectnaptha.com/
  • https://github.com/4lex4/scantailor-advanced
  • open-semantic-search - Open Semantic Search Engine and Open Source Text Mining & Text Analytics platform (Integrates ETL for document processing, OCR for images & PDF, named entity recognition for persons, organizations & locations, metadata management by thesaurus & ontologies, search user interface & search apps for fulltext search, faceted search & knowledge graph)
  • ocrserver - A simple OCR API server, seriously easy to be deployed by Docker, on Heroku as well
  • cosc428-structor - ~1000 book pages + OpenCV + python = page regions identified as paragraphs, lines, images, captions, etc.
  • nidaba - An expandable and scalable OCR pipeline
  • https://github.com/MaybeShewill-CV/CRNN_Tensorflow
  • OCRmyPDF