Abstract

This paper presents a forward mapping rendering algo-rithm to display regular volumetric grids that may not have the same spacings in the three grid directions. It takes advantage of the fact that convolution can be thought of as distributing energy from input samples into space. The renderer calculates an image plane footprint for each data sample and uses the footprint to spread the sample's energy onto the image plane. A result of the technique is that the forward mapping algorithm can support perspective without excessive cost, and support adaptive resampling of the three-dimensional data set during image generation.

Citations

1746	Marching cubes: a high resolution 3D surface construction algorithm - Lorensen, Cline - 1987
304	Compositing digital images - Porter, Duff - 1984
108	V-BUFFER: Visible Volume Rendering - Upson, Keeler - 1988
92	tracing volume densities - Ray - 1984
61	P.: Creating raster omnimax images from multiple perspective views using the elliptical weighted average filter - GREENE, HECKBERT - 1986
32	RA: Back-to-front display of voxel-based objects - Frieder, Gordon, et al. - 1985
26	T.: Building block shaders - ABRAM, WHITTED - 1990
26	Volume rendering: display of surfaces from volume data - Levoy
11	reflection functions for simulation of clouds and dusty surfaces - Light - 1992
3	A rendering algorithm for visualizing 3D scalar data - Sabella - 1988
1	Per Danielsson. "Display of Density Volumes - Lenz, Gudnumdsson, et al. - 1986