Figure 1From: Active contours with neighborhood-extending and noise-smoothing gradient vector flow external forceResults of snakes: (a) the GVF snake at iterations 60, (b) NNGVF snake at iterations 40, (c) GVF snake at iterations 90, and (d) NNGVF snake at iterations 50. In each panel, the left is the evolution of snake and the right is the force field.Back to article page