See the datasets sorted according to the Journal / Conference they first appeared in.
Complex Text Containers
- MSRA Text Detection 500 Database (MSRA-TD500)
- The Street View Text Dataset
- The Street View House Numbers (SVHN) Dataset
- NEOCR: Natural Environment OCR Dataset
- KAIST Scene Text Database
- ICDAR 2003 Robust Reading Competitions
- ICDAR 2005 Robust Reading Competitions
- Table Ground Truth for the UW3 and UNLV datasets
- The DocLab Dataset for Evaluating Table Interpretation Methods
- [the IMPACT data base] The dataset contains more than half a million representative text-based images compiled by a number of major European libraries. Covering texts from as early as 1500, and containing material from newspapers, books, pamphlets and typewritten notes, the dataset is an invaluable resource for future research into imaging technology, OCR and language enrichment.
- PRImA Layout Analysis Dataset
- DFKI Dewarping Contest Dataset (CBDAR 2007) The dataset, that was used in the CBDAR 2007 Dewarping Contest, contains 102 camera captured documents with their corresponding ASCII text ground-truth. Additionally, text-line level ground-truth was also prepared to benchmark curled text-line segmentation algorithms. Part of the dataset (76 out of 102 pages) were also scanned with a flat-bed scanner to create a ground-truth image for image based evaluation of page dewarping algorithms.
- APTI: Arabic Printed Text Image Database
- LRDE Document Binarization Dataset (LRDE DBD) This dataset is composed of documents images extracted from the same French magazine: Le Nouvel Observateur, issue 2402, November 18th-24th, 2010. The provided dataset is composed of 375 Full-Document Images (A4 format, 300-dpi resolution).
- RETAS OCR Evaluation Dataset The RETAS dataset (used in the paper by Yalniz and Manmatha, ICDAR'11) is created to evaluate the optical character recognition (OCR) accuracy of real scanned books. The dataset contains real OCR outputs for 160 scanned books (100 English, 20 French, 20 German, 20 Spanish) downloaded from the Internet Archive website. The corresponding ground truth text for each scanned book is obtained from the Project Gutenberg database. The OCR output of each scanned book is aligned with its ground truth at the word and character level and the alignment output is provided along with estimated OCR accuracies. The dataset is provided for research purposes.
- Chem-Infty Dataset: A ground-truthed dataset of Chemical Structure Images
- Braille Dataset - Shiraz University
- TradeMarks Image Database - By way of Benoit Huet, 999 trademark and logo images
Mixed Content Documents
- Tobacco800 Document Image Database - composed of 1290 document images collected and scanned using a wide variety of equipment over time.
On-line and Off-line
- CASIA Online and Offline Chinese Handwriting Databases - The Chinese handwriting datasets were produced by 1,020 writers using Anoto pen on papers, such that both online and offline data were obtained. Both the online and the offline dataset consists of three subsets for isolated characters (DB1.0–1.2, about 3.9 million samples of 7,356 classes) and three for handwritten texts (DB2.0–2.2, about 5,090 pages and 1.35 million characters). The datasets are free for academic research for handwritten document segmentation and retrieval, character and text line recognition, writer adaptation and identification.
- Persian Heritage Image Binarization Dataset (PHIBD 2012) This dataset contains 15 historical and old manuscript images collected from the historical records at the Documents and old manuscripts treasury of Mirza Mohammad Kazemaini (affiliated with Hazrate Emamzadeh Jafar), Yazd, Iran. The images suffer from various types of degradation including bleed-through, faded ink, and blur. The dataset is the first in a series to provide document images and their ground truth as a contribution to Document image analysis and recognition (DAIR) community. It is planned to provide more data and ground-truth information in the fture.
- UNIPEN database (Click on link 'CDROMs')
- The Informal Competition of Recognizing On-line Words (ICROW) by the Unipen Foundation
- The Rimes Database comprises 12,723 handwritten pages corresponding to 5605 mails of two to three pages. It was collected by asking volunteers to write a letter given one of nine predefined scenarios related to business/customer relations. The dataset has been used in numerous competitions in ICDAR and ICFHR. It is available for research purposes only, through the Web site of the authors.
- CVL-Database - An Off-line Database for Writer Retrieval, Writer Identification and Word Spotting
- IAM Database - A full English sentence database for off-line handwriting recognition.
- The GERMANA Dataset - GERMANA is the result of digitising and annotating a 764-page Spanish manuscript entitled “Noticias y documentos relativos a Doña Germana de Foix, ́última Reina de Aragón", written in 1891 by Vicent Salvador. It contains approximately 21K text lines manually marked and transcribed by palaeography experts.
- The RODRIGO Dataset - RODRIGO is the result of digitising and annotating a manuscript dated 1545. Digitisation was done at 300dpi in color by the Spanish Culture Ministry. The original manuscript is a 853-page bound volume, entitled "Historia de España del arçobispo Don Rodrigo", completely written in old Castilian (Spanish) by a single author. Annotation exists for text blocks, lines and transcriptions, resulting in approximately 20K lines and 231K running words from a lexicon of 17K words.
- MARG- Medical Article Records Groundtruth - A freely-available repository of document page images and their associated textual and layout data. The data has been reviewed and corrected to establish its "ground truth". Please contact Dr. George Thoma (firstname.lastname@example.org) at the National Library of Medicine for more information.
- Hindi font samples by Andras Kornai, June 5 2003
Software and Tools
- Tools from the IMPACT Centre of Competence The tools offered by the Impact Centre of Competence are software components which have been developed by the different technical IMPACT partners during the IMPACT project (2008-2012). Generally, a "tool" is a piece of software which operates on image or text data modifying the data or extracting information from it. Every IMPACT tool has a specific functionality related to OCR, to the the pre- and post-processing stages. They include new approaches in areas such as image enhancement, segmentation, and document structuring, alongside existing and experimental OCR engines.
- GEDI: Groundtruthing Environment for Document Images - A generic annotation tool for scanned text documents.
- PixLabeler - a research tool for labeling elements in a document image at a pixel level.
- OCRopus(tm) - The OCRopus(tm) open source document analysis and OCR system
- The Hidden Markov Model Toolkit (HTK) - a portable toolkit for building and manipulating hidden Markov models
- Bidirectional Long-Short Term Memory Networks - Implementation of Bidirectional Long-Short Term Memory Networks (BLSTM) combined with Connectionist Temporal Classification (CTC) - including examples for Arabic recognition.
- SRILM - The SRI Language Modeling Toolkit - SRILM is a toolkit for building and applying statistical language models (LMs), primarily for use in speech recognition, statistical tagging and segmentation, and machine translation.
- Torch 5 - a Matlab-like environment for state-of-the-art machine learning algorithms.
- PRTools - a Matlab based toolbox for pattern recognition
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