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Multi-scale Feature Extraction for 3D Models Using Local Surface Curvature

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2 Author(s)
Huy Tho Ho ; Sensor Signal Process. Group, Univ. of Adelaide, Adelaide, SA ; Gibbins, D.

In this paper, we present a method for extracting salient local features from 3D models using surface curvature which has application to 3D object recognition. In the developed technique, the amount of curvature at a point is specified by a positive number known as the curvedness. This value is invariant to rotation as well as translation. A local description of the surface is generated by fitting a surface to the neighbourhood of a keypoint and estimating its curvedness at multiple scales. From this surface, points corresponding to local maxima and minima of curvedness are selected as suitable features and a confidence measure of each keypoint is also calculated based on the deviation of its curvedness from the neighbouring values. Experimental results on a different number of models are shown to demonstrate the effectiveness and robustness of our approach.

Published in:

Digital Image Computing: Techniques and Applications (DICTA), 2008

Date of Conference:

1-3 Dec. 2008

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