Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2007-04-18
2011-11-01
Wu, Xiao M. (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S420000, C345S426000, C345S428000, C345S592000, C345S629000
Reexamination Certificate
active
08049752
ABSTRACT:
A system and method of determining a sampling rate for rendering a volumetric image, the method includes determining a regional variation value representing regional data, color, and/or alpha variation. An accumulated opacity value is determined that represents opacity accumulated over a ray in the image, and a regional opacity value is determined that represents regional opacity. A quality setting is accessed that represents a default image quality, and the sampling rate is adjusted as a function of the regional variation value, the accumulated opacity value, the regional opacity value, and the quality setting. The regional variation value may be determined by iteratively generating a maximum regional variation table during pre-processing, quantizing the maximum regional variation table where the transfer function is defined based on a histogram of the volumetric image, and computing the regional variation value using the maximum regional variation table. Also disclosed are methods to calculate the accumulated opacity value, and the regional opacity value, as well as systems and methods of rendering a volumetric image by using the sampling rate.
REFERENCES:
patent: 2004/0125103 (2004-07-01), Kaufman et al.
patent: 2005/0168460 (2005-08-01), Razdan et al.
patent: 2005/0285858 (2005-12-01), Yang et al.
patent: 2006/0274065 (2006-12-01), Buyanovskiy
Nelson Max; “Optical Models for Direct Volume Rendering”; University of California, Davis, and Lawrence Livermore national Laboratory, Jun. 1995.
Marc Levoy; “Display of Surfaces from Volume Data”; Jun. 1987 (revised Feb. 1988); Computer Science, Department University of North Carolina; Chapel Hill, NC 27514.
Marc Levoy; “Volume Rendering by Adaptive Refinement”; Jun. 1988 (revised Jan. 1989); Computer Science Department University of North Carolina Chapel Hill, NC 27599.
Phillippe Lacroute, et al.; “Fast Volume Rendering Using a Shear-Warp Factorization of the Viewing Transformation” Computer Science Laboratory, Stanford University, Sep. 1995.
Marc Levoy; “Efficient Ray Tracing of Volume Data”; University of North Carolina, Jul. 1990.
John Pawasauskas; “Volume Visualization With Ray Casting”; CS563—Advanced Topics in Computer Graphics; Feb. 18, 1997.
Bordoloi Udeepta D.
Xie Min
Yang Lining
Kendall Peter L.
Ma Tize
Siemens Medical Solutions USA , Inc.
Wu Xiao M.
LandOfFree
Systems and methods of determining sampling rates for volume... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods of determining sampling rates for volume..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods of determining sampling rates for volume... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4268708