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Conventional 3D-DFT features proposed for 3D model retrieval tried to extract the spectral/cepstral features from the spectrum/cepstrum of the 3D model, without considering the local properties of a 3D model. In this paper, local 3D-DFT spectral descriptor as well as local 3D-DFT cepstral descriptor will be proposed for 3D model retrieval. First, the set of voxels covering the surface of a 3D model is divided into 8 octants. 3D-DFT spectral descriptors and 3D-DFT cepstral descriptors are extracted from each octant and combined to form the local 3D-DFT spectral descriptor and local 3D-DFT cepstral descriptor. Experiments conducted on the Princeton Shape Benchmark (PSB) database have shown that the proposed local 3D-DFT descriptors outperform other 3D-DFT descriptors.

3D Model Retrieval Using 3D-DFT Spectral and Cepstral Descriptors of Local Octants