Title :
Feature extraction on 3-D TexMesh using scale-space analysis and perceptual evaluation
Author :
Cheng, Irene ; Boulanger, Pierre
Author_Institution :
Univ. of Alberta, Edmonton, Alta., Canada
Abstract :
Efficient online visualization of three-dimensional (3-D) textured models is essential for a variety of applications including not only games and e-commerce, but also heritage and medicine. To visualize 3-D objects online, it is necessary to quickly adapt both mesh and texture to the available computational or network resources. Earlier research showed that after reaching a minimum required mesh density, high-resolution texture has more impact on human perception than a denser mesh. Given limited bandwidth, an important issue is how to extract features that best represent the original object, and how to allocate resources between mesh and texture data to achieve optimal perceptual quality. In this paper, we propose a textured mesh (TexMesh) model, which applies scale-space analysis and perceptual evaluation to extract 3-D features for textured mesh simplification and transmission. Texture data is divided into fragments to facilitate quality and bandwidth adaptation. Texture quality assignment is based on feature point distribution. Online transmission is based on statistics gathered during preprocessing, which are stored in a priority queue and lookup tables. Quality of service requested by a client site can be met by applying an efficient adaptive algorithm to ensure optimal use of the specified time and available bandwidth, and at the same time preserving satisfactory quality. Our TexMesh framework integrates feature extraction, mesh simplification, texture reduction, bandwidth adaptation, and perceptual evaluation into a multiscale visualization framework.
Keywords :
bandwidth allocation; feature extraction; multimedia communication; quality of service; queueing theory; table lookup; 3D textured mesh; bandwidth adaptation; feature extraction; feature point distribution; high-resolution texture; lookup tables; mesh density; mesh simplification; online visualization; perceptual evaluation; quality of service; queueing; resource allocation; scale-space analysis; texture quality assignment; texture reduction; three-dimensional textured models; Bandwidth; Computer networks; Data mining; Feature extraction; Humans; Quality of service; Resource management; Statistical distributions; Table lookup; Visualization; Bandwidth adaptation; feature extraction; level of detail (LOD); perceptual evaluation; scale-space analysis; texture reduction;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
DOI :
10.1109/TCSVT.2005.854234