NDLI: Vertex relocation: a feature-preserved terrain rendering method for pervasive computing environments

Content Provider	Springer Nature Link
Author	Lee, Eun Seok Lee, Jin Hee Shin, Byeong Seok
Copyright Year	2015
Abstract	Recent days, real-time 3D visualization is widely required for pervasive games. Despite the use of level-of-detail techniques, the real-time rendering of massive terrain datasets exceeds the capability of today’s graphics hardware. So, to visualize the realistic terrain on various devices, the oversimplification of datasets is required. The oversimplification reduces computing and data transmission time. Owing to the oversimplification, however, artifacts such as geo-popping may appear in rugged regions, particularly when low level-of-detail is involved. Geo-popping is undesirable visual effect that occurs when the transition of a 3D object to a different level of detail is performed. To reduce such artifacts, we propose a novel mesh simplification method by concentrating on the vertices of regular grids in a rugged area using the concept of attraction and elastic forces. Each sampling point of the terrain data may pull on adjacent vertices with an attraction force that corresponds to its predicted surface roughness. However, strong attraction forces may cause a geometrical twisting or overlapping problems. To solve these problems, we apply an elastic force to a vertex and its neighbors. This makes each vertex push its neighbors away when they are too close. Computing the displacement of each vertex using attraction and elastic forces provides a fine-mesh terrain representation in rough areas, and a coarse-mesh representation in smooth areas. As a result, our method efficiently visualizes more accurate terrain scenes by reducing the number of geo-popping that mainly appear in rugged areas.
Starting Page	14057
Ending Page	14073
Page Count	17
File Format	PDF
ISSN	13807501
Journal	Multimedia Tools and Applications
Volume Number	75
Issue Number	22
e-ISSN	15737721
Language	English
Publisher	Springer US
Publisher Date	2015-06-07
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Terrain rendering feature preserving vertex relocation displacement mapping Multimedia Information Systems Computer Communication Networks Data Structures, Cryptology and Information Theory Special Purpose and Application-Based Systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software Media Technology

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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