Fuzzy External Force for Snake

Snake, or active contours, have been used extensively in image segmentation. However, all present snake models use mathematical formula in external force and minimize it mathematically to propagate gradient vectors and extend capture range which it has some complexities. In this paper, a new type of external force for snakes named fuzzy external force (FEF) is proposed that uses fuzzy logic to diffuse gradient vectors of images. It makes edges fuzzy by using fuzzy sets in x and y directions separately. Experimental results demonstrate that the FEF snake provides segmentation as well as GVF based methods with less mathematical complexity and faster convergence.