Institution: Stanford University, Computer Systems Laboratory

Title: Frequency Domain Volume Rendering

Author: Totsuka, Takashi

Author: Levoy, Marc

Date: April 1993

Abstract: The Fourier projection-slice theorem allos projections of volume data to be generated in O(nsquare log n) time for a volumbe of size ncube. The method operates by extracting and inverse Fourier transforming 2D slices from a 3D frequency domain representation of the volume. Unfortunately, these projections do not exhibit the occlusion that is characteristic of conventional volume renderings. We present a new frequency domain volume rendering algorithm that replaces much of the missing depth and shape cues by performing shading calculations in the frequency domain during slice extraction. In particular, we demonstrate frequency domain methods for computing linear or nonlinear depth cueing and directional diffuse reflection. The resulting images can be generated an order of magnitude faster than volume renderings and may be more useful for many applications.

http://i.stanford.edu/pub/cstr/reports/csl/tr/93/570/CSL-TR-93-570.pdf