Abstract
This paper deals with three-dimensional (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 (specifically houseplants) under illumination by a compact light source. The variation of such histograms with light source direction resembles that of synthetic histograms generated using a Phong-type reflectance model and a uniform texel orientation model, and ignoring transmittance, interreflection and shadows.
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