Higher order approximating normals and their impact on isosurface shading accuracy

Authors:
B. A. Wood;J. K. Lee;M. Maskey;T. S. Newman
Affiliations:
Department of Computer Science, University of Alabama in Huntsville, Huntsville, AL;Department of Computer Science, Bowling Green State University, Bowling Green, OH;Department of Computer Science, University of Alabama in Huntsville, Huntsville, AL;Department of Computer Science, University of Alabama in Huntsville, Huntsville, AL
Venue:
Machine Graphics & Vision International Journal
Year:
2010

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Abstract

Two alternatives to the standard (central differencing) method for estimating normals of Marching Cubes isosurfaces are considered. The methods are based on higher order approximations of dataset gradients. Of primary concern here are the effects of these methods on rendering quality, which is evaluated here through pixel-by-pixel comparisons of typical-fidelity isosurfaces versus high-fidelity rendering achievable from analytically derived formulae. The evaluations also consider effects of noise on isosurface rendering quality for renderings based on standard versus higher order gradients.