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ECCV
2010
Springer

Articulation-Invariant Representation of Non-planar Shapes

10 years 9 months ago
Articulation-Invariant Representation of Non-planar Shapes
Given a set of points corresponding to a 2D projection of a non-planar shape, we would like to obtain a representation invariant to articulations (under no self-occlusions). It is a challenging problem since we need to account for the changes in 2D shape due to 3D articulations, viewpoint variations, as well as the varying effects of imaging process on different regions of the shape due to its non-planarity. By modeling an articulating shape as a combination of approximate convex parts connected by non-convex junctions, we propose to preserve distances between a pair of points by (i) estimating the parts of the shape through approximate convex decomposition, by introducing a robust measure of convexity and (ii) performing part-wise affine normalization by assuming a weak perspective camera model, and then relating the points using the inner distance which is insensitive to planar articulations. We demonstrate the effectiveness of our representation on a dataset with non-planar articula...
Raghuraman Gopalan, Pavan K. Turaga, Rama Chellapp
Added 10 Feb 2011
Updated 10 Feb 2011
Type Journal
Year 2010
Where ECCV
Authors Raghuraman Gopalan, Pavan K. Turaga, Rama Chellappa
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