Zernike moment and local distribution fitting fuzzy energy-based active contours for image segmentation

Thi Thao Tran, Van Truong Pham, Kuo Kai Shyu

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


This paper presents a new region-based active contour model for extracting the object boundaries in an image, based on techniques of curve evolution. The proposed model introduces an energy functional that involves intensity distributions in local image regions and fuzzy membership functions. The local image intensity distribution information used to guide the motion of the contour, in the paper, is derived by Hueckel operator in the neighborhood of each image point. The parameters of Hueckel operator are estimated by a set of orthogonal Zernike moments before curve evolution. Meanwhile, the fuzzy membership functions are used to measure the association degree of each image pixel to the region outside and inside the contour. To minimize the energy functional, instead of solving the Euler-Lagrange equation of the underlying problem, the paper employs a direct method to compute the energy alterations. As a result, the model can deal with images with intensity inhomogeneity. In addition, the model effectively alleviates the sensitivity to contour initialization. Moreover, the model reduces computational cost, avoids problems associated with choosing time steps as well as allows fast convergence to the segmentation solutions. Experimental results on synthetic, real images and comparisons with other models show the desired performances of the proposed model.

Original languageEnglish
Pages (from-to)11-25
Number of pages15
JournalSignal, Image and Video Processing
Issue number1
StatePublished - Jan 2014


  • Active contour
  • Fuzzy energy
  • Image segmentation
  • Level set
  • Zernike moments


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