Computergrafik
Polynomial Texture Maps (PTM)
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Depicted below is an apparatus that can capture a so called Polynomial Texture Map (PTM). The PTM compresses the BRDFs of a captured texture into a couple of polynomial coefficients instead of RGB values. The reproduction of a shaded surface that is textured with a PTM is described in the original paper by Tom Malzbender et. al.:
Example apparatus to capture a PTM:
