Active blobs: region-based, deformable appearance models

Authors:
Stan Sclaroff;John Isidoro
Affiliations:
Image and Video Computing Group, Computer Science Department, Boston University, Boston, MA;Image and Video Computing Group, Computer Science Department, Boston University, Boston, MA
Venue:
Computer Vision and Image Understanding - Special issue on nonrigid image registration
Year:
2003

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Abstract

A region-based approach to nonrigid motion tracking is described. Shape is defined in terms of a deformable triangular mesh that captures object shape plus a color texture map that captures object appearance. Photometric variations are also modeled. Nonrigid shape registration and motion tracking are achieved by posing the problem as an energy-based, robust minimization procedure. The approach provides robustness to occlusions, wrinkles, shadows, and specular highlights. The formulation is tailored to take advantage of texture mapping hard-ware available in many workstations, PCs, and game consoles. This enables nonrigid tracking at speeds approaching video rate.