Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2005-09-06
2005-09-06
Nguyen, Kimbinh T. (Department: 2671)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S421000, C345S423000, C345S426000, C345S427000, C382S128000
Reexamination Certificate
active
06940507
ABSTRACT:
A volume rendering process is disclosed for improving the visual quality of images produced by rendering and displaying volumetric data in voxel format for the display of three-dimensional (3D) data on a two-dimensional (2D) display with shading and opacity to control the realistic display of images rendered from the voxels. The process includes partitioning the plurality of voxels among a plurality of slices with each slice corresponding to a respective region of the volume. Each voxel includes an opacity value adjusted by applying an opacity curve to the value. The opacity value of each voxel in each cell in the volume is converted into a new visual opacity value that is used to calculate a new visual opacity gradient for only one voxel in the center of each cell. The visual opacity gradient is used to calculate the shading, used to modify the color of individual voxels based on the orientation of opacity isosurfaces passing through each voxel in the volume, in order to create a high quality, realistic image.
REFERENCES:
patent: 4835712 (1989-05-01), Drebin
patent: 5499323 (1996-03-01), Doi et al.
patent: 5766129 (1998-06-01), Mochizuki
patent: 5986662 (1999-11-01), Argiro et al.
patent: 6130671 (2000-10-01), Argiro
patent: 6219059 (2001-04-01), Argiro
patent: 6278459 (2001-08-01), Malzbender et al.
Derek R. Ney et al., “Volumetric Rendering of Computed Tomography Data: Principles and Techniques”, IEEE Computer Graphics & Applications, Mar. 1990, p. 19-27.
Robert A. Drebin et al., “Volume Rendering”, Computer Graphics, vol. 22, No. 4, Aug. 1988, p. 110-119.
Gerald D. Kidd, “Fundamentals of 3-D Seismic Volume Visualization”, The Leading Edge, Jun. 1999, p. 702-710.
Tatum M. Sheffield et al., “Geovolume Visualization Interpretation: Color in 3-D Volumes”, The Leading Edge, Jun. 1999, p. 668-674.
Rüdiger Westermann, et al., “Efficiently Using Graphics Hardware in Volume Rendering Applications”, Computer Graphics Proceedings, Annual Conference Series, 1998, p. 169-177.
Michael Meibner et al., “Enabling Classification and Shading for 3D Texture Mapping based Volume Rendering using OpenGL and Extensions”, Proceedings of the Conference on Visualization, 1999, p. 207-214.
Victoria Interrante et al., “Rendering”, Department of Computer Science, The University of North Carolina at Chapel Hill, p. 41-65.
Karl Heinz Hohne et al., “Voxel-based Volume Visualization Techniques”, Institute of Mathematics and Computer Science in Medicine, University Hospital, Eppendorf, University of Hamburg, p. 66-83.
Karl Heinz and Ralph Bernstein, “Shading 3D-Images from CT Using Gray-Level Gradients”, Transactions on medical imaging, vol MI-5, No. 1, Mar. 1986.
Passolt Mark S.
Repin Dmitriy G.
Bouchard John H.
Maseles Danita J. M.
Nguyen Kimbinh T.
LandOfFree
Method and apparatus for visualization of 3D voxel data... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for visualization of 3D voxel data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for visualization of 3D voxel data... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3377378