Analytic rendering of curvilinear volume data

Technical Report · Mon Mar 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10112506· OSTI ID:10112506

Bethel, W

A technique is presented for analytically rendering volume data from curvilinear grids. The method employs analytic techniques for manipulating and rendering curvilinear voxels. A curvilinear voxel is represented using a cubic triparametric solid formulation. The control points defining the cubic triparametric voxel are computed from the original curvilinear grid using the Catmull-Rom formulation, and subsequently rendered using a three-dimensional forward difference operator. The primary benefit from using such a representation is the fact the voxel shape and data values are C1-continuous across voxel boundaries. The issue of voxel opacity, both at the sub-voxel and super-voxel levels, is investigated. The use of both tricubic representation and rendering, along with the new approach to managing voxel opacity, results in images which are markedly different from those presented in previous work.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10112506
• Report Number(s): LBL--33808; ON: DE94004934
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200
990301
ALGORITHMS
COMPUTER GRAPHICS
CURVILINEAR COORDINATES
DATA HANDLING
DATA PROCESSING
FLUID MECHANICS
IMAGES
MATHEMATICS AND COMPUTERS
SPLINE FUNCTIONS
SURFACES
VOLUME