NDLI: Document skew detection based on local region complexity

Content Provider	IEEE Xplore Digital Library
Author	Ishitani, Y.
Copyright Year	1993
Description	Author affiliation: Toshiba Corp., Kawasaki, Japan (Ishitani, Y.)
Abstract	A new method is proposed for detecting skew in document images which contain a mixture of text areas, photographs, figures, charts, and tables. Two basic ideas are introduced in the method. One idea is that a new parameter is used for skew detection to discern the orientation of text lines in document images. This parameter is based on the document image complexity and is obtained from the number of transitions from white to black pixels or vice versa. The other idea is that skew is detected in local regions in which only text lines are expected. Such local regions are extracted from a document image automatically and the obtained skew angle is defined as the overall document skew. Document skew has been measured in experiments with an error of 0.12 degrees on the average for all test documents.<>
Starting Page	49
Ending Page	52
File Size	404744
Page Count	4
File Format	PDF
ISBN	0818649607
DOI	10.1109/ICDAR.1993.395784
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-10-20
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pixel Text analysis Research and development Computer errors Testing Document image processing Documentation Optical character recognition software Image segmentation Character recognition
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

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