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Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 791958, 16 pages
http://dx.doi.org/10.1155/2012/791958
Research Article

Local- and Global-Statistics-Based Active Contour Model for Image Segmentation

Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China

Received 9 October 2011; Accepted 24 January 2012

Academic Editor: Francesco Pellicano

Copyright © 2012 Boying Wu and Yunyun Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a local- and global-statistics-based active contour model for image segmentation by applying the globally convex segmentation method. We first propose a convex energy functional with a local-Gaussian-distribution-fitting term with spatially varying means and variances and an auxiliary global-intensity-fitting term. A weight function that varies dynamically with the location of the image is applied to adjust the weight of the global-intensity-fitting term dynamically. The weighted total variation norm is incorporated into the energy functional to detect boundaries easily. The split Bregman method is then applied to minimize the proposed energy functional more efficiently. Our model has been applied to synthetic and real images with promising results. With the local-Gaussian-distribution-fitting term, our model can also handle some texture images. Comparisons with other models show the advantages of our model.