NDLI: A fast multigrid implicit algorithm for the evolution of geodesic active contours

Content Provider	IEEE Xplore Digital Library
Author	Papandreou, G. Maragos, P.
Copyright Year	2004
Description	Author affiliation: Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece (Papandreou, G.; Maragos, P.)
Abstract	Active contour models are among the most popular PDE-based tools in computer vision. In this paper we present a new algorithm for the fast evolution of geodesic active contours and compare it with other established numerical schemes. The new algorithm employs a full time-implicit and unconditionally stable numerical scheme and applies multigrid methods for the efficient solution of the occurring sparse linear system. When we utilize very big time-steps for the numerical evolution of the front, the proposed scheme has increased accuracy and better rotational invariance properties compared with the alternative AOS scheme. This allows for the rapid evolution and convergence of the contour to its final configuration after only very few iterations. Standard pyramidal and/or narrowband techniques can be easily integrated into our algorithm and further accelerate the curve evolution. Experimental results in object boundary detection demonstrate the power of the method.
Sponsorship	IEEE Comput. Soc
File Size	651356
File Format	PDF
ISBN	0769521584
ISSN	10636919
DOI	10.1109/CVPR.2004.1315231
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Active contours Computer vision Object detection Level set Geophysics computing Narrowband Solid modeling Stability Multigrid methods Linear systems
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition Software

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