Fuzzy Active Circles Searching for Contour Location

For the contour extraction from the images, the traditional active contour models may trap in local minimum and strongly depend on initial contour. A contour location algorithm based on active circle searching is proposed in this paper. A searching series of circles are used in locating the contour with fuzzy radius reduction and adaptive threshold. And the center of the active circles are also be adjusted by the proposed rules. The simulations also show that the proposed algorithm has a great performance for different kinds of images.