Document Detail


Geometry-dependent lighting.
MedLine Citation:
PMID:  16509379     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this paper, we introduce geometry-dependent lighting that allows lighting parameters to be defined independently and possibly discrepantly over an object or scene based on the local geometry. We present and discuss Light Collages, a lighting design system with geometry-dependent lights for effective feature-enhanced visualization. Our algorithm segments the objects into local surface patches and places lights that are locally consistent but globally discrepant to enhance the perception of shape. We use spherical harmonics for efficiently storing and computing light placement and assignment. We also outline a method to find the minimal number of light sources sufficient to illuminate an object well with our globally discrepant lighting approach.
Authors:
Chang Ha Lee; Xuejun Hao; Amitabh Varshney
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  IEEE transactions on visualization and computer graphics     Volume:  12     ISSN:  1077-2626     ISO Abbreviation:  IEEE Trans Vis Comput Graph     Publication Date:    2006 Mar-Apr
Date Detail:
Created Date:  2006-03-02     Completed Date:  2006-03-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9891704     Medline TA:  IEEE Trans Vis Comput Graph     Country:  United States    
Other Details:
Languages:  eng     Pagination:  197-207     Citation Subset:  IM    
Affiliation:
National Capital Area Medical Simulation Center, Silver Spring, MD 20910, USA. clee@simcen.usuhs.mil
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MeSH Terms
Descriptor/Qualifier:
Algorithms*
Computer Graphics*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Imaging, Three-Dimensional / methods*
Information Storage and Retrieval / methods
Lighting*
User-Computer Interface*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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