Hybrid Method and System for Content-based 3D Model Search

Abstract

The present disclosure concerns a hybrid content-based 3D model search and retrieval method for queries in generic 3D model datasets. The hybrid nature of the method is two-fold. First, a combination of 2D and 3D features is used as the shape descriptor of a 3D model and second, two alternative alignment techniques, CPCA and NPCA, are employed for rotation normalization. The 2D features are Fourier coefficients extracted from three pairs of depth buffers which are computed for each Cartesian plane capturing the model's thickness along each axis. The 3D features are spherical harmonic coefficients extracted from a spherical function based representation that captures the model's surface as well as volume information.

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