NDLI: A generalized 3D shape sampling method and file format for storage or indexing

Content Provider	IEEE Xplore Digital Library
Author	Jiann-Jone Chen Cheng-Chin Chiang Lin, D.W.
Copyright Year	2000
Description	Author affiliation: Advanced Technol. Centre, Ind. Technol. Res. Inst., Hsinchu, Taiwan (Jiann-Jone Chen)
Abstract	Several ways of 2D shape (or contour) description in terms of Fourier and wavelet transform coefficients have been proposed. They provide data compression capability, and some of the descriptors are invariant under scaling, rotation, and choice of the starting point for contour tracing. Several methods for 3D shape description also exist. However, they lack either the simplicity, the generality, or the data compression ability comparable to the 2D methods. We propose a generalized sampling method for efficient description of free-form 3D shape surfaces. The key idea is to warp a 3D spherical coordinate system onto the 3D surface, so that the spatial coordinates of each point on the surface may be represented parametrically as {x(/spl alpha/,/spl beta/), y(/spl alpha/,/spl beta/), z(/spl alpha/,/spl beta/)}, where /spl les//spl alpha//spl les/2/spl pi/ and 0/spl les//spl beta//spl les//spl pi/ with /spl alpha/ and /spl beta/ giving normalized arc lengths on the 3D surface. Fourier, wavelet, or other 2D transforms can then be applied to the three coordinate functions for purposes of data compression, database storage, or indexing. Simulations show that wavelet-based method yields efficient 3D shape compression based on this generalized sampling approach.
Starting Page	780
Ending Page	783
File Size	392882
Page Count	4
File Format	PDF
ISBN	0780362977
ISSN	15224880
DOI	10.1109/ICIP.2000.899825
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shape Sampling methods Indexing Data compression Fourier transforms Wavelet transforms Telecommunication computing Communication industry Computer industry Spatial databases
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