NDLI: Grid-based modelling and correction of arbitrarily warped historical document images for large-scale digitisation

Please wait, while we are loading the content...

Style-based retrieval for ancient Syriac manuscripts

Linking the past: discovering historical social networks from documents and linking to a genealogical database

Rule based document understanding of historical books using a hybrid fuzzy classification system

Development of Nom character segmentation for collecting patterns from historical document pages

IMPACT: centre of competence in text digitisation

TSV-LR: topological signature vector-based lexicon reduction for fast recognition of pre-modern Arabic subwords

Automatic indexing of French handwritten census registers for probate geneaology

Combining statistical and geometrical classifiers for text extraction in multispectral document images

Character segmentation from ancient palm leaf manuscripts in Thailand

An experimental workflow development platform for historical document digitisation and analysis

Searching historical manuscripts for near-duplicate figures

Enabling search for facts and implied facts in historical documents

Grid-based modelling and correction of arbitrarily warped historical document images for large-scale digitisation

Thanatos: automatically retrieving information from death certificates in Brazil

HistDoc v. 2.0: enhancing a platform to process historical documents

User-assisted alignment of Arabic historical manuscripts

Performing information extraction to improve OCR error detection in semi-structured historical documents

Towards a faithful visualization of historical books on e-book readers

A design of a preprocessing framework for large database of historical documents

Transcription alignment of Latin manuscripts using hidden Markov models

Data mining medieval documents by word spotting

Text line segmentation for gray scale historical document images

The CADAL calligraphic database

A keyword spotting approach using blurred shape model-based descriptors

Image processing for historical newspaper archives

Grid-based modelling and correction of arbitrarily warped historical document images for large-scale digitisation

Content Provider	ACM Digital Library
Author	Yang, Po Pletschacher, Stefan Antonacopoulos, Apostolos Clausner, Christian
Abstract	Historical document images frequently show evidence of geometric distortions mostly due to storage conditions (arbitrary warping) but also due to the original printing process (non-straight text lines), the use of the document (folds) and scanning method (page curl). Correcting such distortions improves both recognition rate and visual appearance (e.g. for easier human reading or on-demand printing). However, the nature of the documents with layout irregularities and broken/touching characters of archaic fonts poses significant challenges. In addition, for large-scale digitisation of books and newspapers, methods need to be robust, efficient, reversible and must be able to be applied unsupervised on (possibly multi-columned) documents that may or may not be warped (no distortion should be introduced on unwarped images). No such method exists in the literature. In this paper, an effective grid-based method is presented to geometrically model and correct arbitrarily warped historical documents with relatively complex layout (multi column with graphics). A global grid with sub-grids for differing parts of a page is constructed by accurately determining text baselines. The warped image is corrected by transforming each quadrilateral sub-grid of the global grid into its intended rectangular form. Preliminary experimental results show that this method efficiently corrects arbitrarily warped historical documents, with an improved performance over a leading geometric correction method and the industry standard commercial system.
Starting Page	106
Ending Page	111
Page Count	6
File Format	PDF
ISBN	9781450309165
DOI	10.1145/2037342.2037360
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-09-16
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Dewarping Historical documents Geometric distortion Text line detection Geometrical model
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Restoration of Arbitrarily Warped Historical Document Images Using Flow Lines

Effective geometric restoration of distorted historical document for large-scale digitisation

Restoration of arbitrarily warped document images based on text line and word detection

RESTORATION OF ARBITRARILY WARPED DOCUMENT IMAGES BASED ON TEXT LINE AND WORD DETECTION

3d geometric and optical modeling of warped document images

Model-Based Book Dewarping Method for Content-Independent Document Images

Warped document restoration by recovering shape of the surface

Text Line Based Correction of Distorted Document Images

Automatic performance evaluation of dewarping methods in large scale digitization of historical documents

Grid-based modelling and correction of arbitrarily warped historical document images for large-scale digitisation

Similar Documents

Restoration of Arbitrarily Warped Historical Document Images Using Flow Lines

Effective geometric restoration of distorted historical document for large-scale digitisation

Restoration of arbitrarily warped document images based on text line and word detection

RESTORATION OF ARBITRARILY WARPED DOCUMENT IMAGES BASED ON TEXT LINE AND WORD DETECTION

3d geometric and optical modeling of warped document images

Model-Based Book Dewarping Method for Content-Independent Document Images

Warped document restoration by recovering shape of the surface

Text Line Based Correction of Distorted Document Images

Automatic performance evaluation of dewarping methods in large scale digitization of historical documents

Grid-based modelling and correction of arbitrarily warped historical document images for large-scale digitisation