3D point of interest detection via spectral irregularity diffusion

Authors:
Ran Song;Yonghuai Liu;Ralph R. Martin;Paul L. Rosin
Affiliations:
Department of Computer Science, Aberystwyth University, Aberystwyth, UK;Department of Computer Science, Aberystwyth University, Aberystwyth, UK;School of Computer Science & Informatics, Cardiff University, Cardiff, UK;School of Computer Science & Informatics, Cardiff University, Cardiff, UK
Venue:
The Visual Computer: International Journal of Computer Graphics
Year:
2013

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Abstract

This paper presents a method for detecting points of interest on 3D meshes. It comprises two major stages. In the first, we capture saliency in the spectral domain by detecting spectral irregularities of a mesh. Such saliency corresponds to the interesting portions of surface in the spatial domain. In the second stage, to transfer saliency information from the spectral domain to the spatial domain, we rely on spectral irregularity diffusion (SID) based on heat diffusion. SID captures not only the information about neighbourhoods of a given point in a multiscale manner, but also cues related to the global structure of a shape. It thus preserves information about both local and global saliency. We finally extract points of interest by looking for global and local maxima of the saliency map. We demonstrate the advantages of our proposed method using both visual and quantitative comparisons based on a publicly available benchmark.