Ms. Deboshmita Ghosh Profile

Deboshmita Ghosh

at Univ of California Davis

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Proceedings Article | 13 March 2009 Paper

Feature-driven deformation for dense correspondence

Deboshmita Ghosh, Andrei Sharf, Nina Amenta

Proceedings Volume 7261, 726136 (2009) https://doi.org/10.1117/12.811463

KEYWORDS: Medical imaging, Visualization, Visual process modeling, Current controlled current source, Surgery, Computing systems, Skull, Detection and tracking algorithms, Teeth

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Establishing reliable correspondences between object surfaces is a fundamental operation, required in many contexts such as cleaning up and completing imperfect captured data, texture and deformation trans- fer, shape-space analysis and exploration, and the automatic generation of realistic distributions of objects. We present a method for matching a template to a collection of possibly target meshes. Our method uses a very small number of user-placed landmarks, which we augment with automatically detected feature correspondences, found using spin images. We deform the template onto the data using an ICP-like framework, smoothing the noisy correspondences at each step so as to produce an averaged motion. The deformation uses a dierential representation of the mesh, with which the deformation can be computed at each iteration by solving a sparse linear system. We have applied our algorithm to a variety of data sets. Using only 11 landmarks between a template and one of the scans from the CEASAR data set, we are able to deform the template, and correctly identify and transfer distinctive features, which are not identied by user-supplied landmarks. We have also successfully established correspondences between several scans of monkey skulls, which have dangling triangles, non-manifold vertices, and self intersections. Our algorithm does not require a clean target mesh, and can even generate correspondence without trimming our extraneous pieces from the target mesh, such as scans of teeth.

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