NDLI: Digital geometric invariance and shape representation

Content Provider	IEEE Xplore Digital Library
Author	Gross, A. Latecki, L.
Copyright Year	1995
Description	Author affiliation: Graduate Center, City Univ. of New York, Flushing, NY, USA (Gross, A.)
Abstract	In this paper, we present conditions which guarantee that a realistic digitization process preserves the qualitative differential geometry of the object boundary, such as convexity and inflection. This is possible since very few digital boundary patterns are shown to be realizable, and each such digital pattern has a well-defined geometric interpretation with respect to tangent direction. Using the set of realizable boundary patterns, we can recover geometric properties of the digitized object boundary, such as convexity and inflection. In addition, since all the realizable patterns are known, any other pattern can be labeled as either noise or a boundary discontinuity. Since each of these patterns has a well-defined tangent span, an adjacency graph can be generated from the patterns and this graph can be used to recursively generate the set of all possible digital boundary curves. The digitization process used in this paper is equivalent to setting a very low threshold value on the sensor output.
Starting Page	121
Ending Page	126
File Size	622950
Page Count	6
File Format	PDF
ISBN	0818671904
DOI	10.1109/ISCV.1995.476988
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer science Image sensors Computer vision Solid modeling Computational geometry Shape Machine vision USA Councils Educational institutions Parametric statistics
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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