Volume 32 (2013)

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PHOG: Photometric and Geometric Functions for Textured Shape Retrieval
(The Eurographics Association and Blackwell Publishing Ltd., 2013) Biasotti, Silvia; Cerri, Andrea; Giorgi, Daniela; Spagnuolo, Michaela; Yaron Lipman and Hao Zhang
In this paper we target the problem of textured 3D object retrieval. As a first contribution, we show how to include photometric information in the persistence homology setting, also proposing a novel theoretical result about multidimensional persistence spaces. As a second contribution, we introduce a generalization of the integral geodesic distance which fuses shape and color properties. Finally, we adopt a purely geometric description based on the selection of geometric functions that are mutually independent. The photometric, hybrid and geometric descriptions are combined into a signature, whose performance is tested on a benchmark dataset.