Opacity-weighted color interpolation, for volume sampling
Craig M. Wittenbrink, Thomas Malzbender, Michael E. Goss · 1998
AbstictVolume rendering cr-s images horn sampled volumetric h me compute intensive nature of volume rendering has driven resmch in ~gorithm optiom An important speed opmon is the use of preclassfication and preshdmg.We demonstrate an =ct that rdts when interpolating from preclassified or preshaded colors and opacity values separately.~ls method is flaw@ leadrng to visible artifacts.We present an improvd technique, opaci~-weighted color interpolatio~ evdu~= the RMS error improvemen~hardware and dgonthm efficiency, and demonstrated improvements.We show andytidly that opaci~-weighted color interpolation exatiy reprodums material based interpolation retits for certain volume classfi~with the efficiencies of preclass-ficatiom Our proposed technique may *O have broad impact on opacity-texture-mapped polygon rendering.Keyword~volume rendering, compositing, ray tracing.