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Adlai Waksman. Azriel Rosenfeld. Sparse, Opaque Three-Dimensional Texture, 2b: Photometry. October 1994.
This paper deals with 3D textures composed of approximately planar texels distributed over a volume of space ("leafy" textures). It studies the gray level histograms of images of such textures under illumination by a compact light source. Simple models c an be used to iescribe the variation of such histograms with light source direction. In fact, the variation If real plant histograms with light source direction resembles that of synthetic histograms generated using a Phong-type reflectance model and a un iform texel orientation model, and Ignoring transmittance, interreflection, and shadows. (Also cross-referenced as CAR-TR-740) Department of Computer Science, University of Maryland, Center for Automation Research, The postscript version of this TR is available from the Center for Automation Research via anonymous ftp at ftp.cfar.umd.edu; or via the WWW at http://www.cfar.umd.edu/CfAR/TRs.
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