Abstract
The proper choice of local surface feature descriptors is a key step for an accurate and robust surface matching between different range images. This paper presents a novel 3D feature descriptor for free form objects based on rotational projection statistics. A rotation invariant local reference frame for each feature point is defined by performing an eigenvalue decomposition on the covariance matrix formed by all points lying on the local surface. The feature descriptor is then constructed by rotationally projecting the neighboring 3D points onto 2D planes and by calculating low order moments and the entropy of the 2D distribution matrix on these planes. Experiments were performed on a dataset comprised of 45 scenes, and the results show that the proposed method is robust to noise and variations in mesh resolution.
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