A Variational Level Set Method for Multiple Object Detection

Authors:
Zhenkuan Pan;Hua Li;Weibo Wei;Shuhua Xu
Affiliations:
College of Information Engineering, Qingdao University, Qingdao, China 266071;College of Information Engineering, Qingdao University, Qingdao, China 266071;College of Information Engineering, Qingdao University, Qingdao, China 266071;College of Information Engineering, Qingdao University, Qingdao, China 266071
Venue:
ISVC '08 Proceedings of the 4th International Symposium on Advances in Visual Computing, Part II
Year:
2008

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Abstract

A novel variational level set method for multiple object detection is presented, which uses n -1 level set functions for n -1 objects and the background without overlapping and vacuum problems. The energy functional includes three parts. The first part is a parametric region-based model via generic image noise distributions, the second part is the classic edge-based model, the third part is a term used to enforce the constraints of level set functions as signed distance functions. Characteristic functions for region partitioning are written in a unified form using Heaviside functions of level set functions. Some intermediate terms in evolution equations are extracted in a unified form for simplification of expressions and computation efficiency. The corresponding semi-implicit schemes are derived and used to some examples for segmentation of synthetic and real images to validate the method suggested in this paper.