Pulse-Coupled Neural Networks (PCNN) is very suitable for image segmentation.In condition of certain parameters

the result of segmentation will periodically change with the iteration times.Therefore

how to decided the best iteration times is the key of applying PCNN in image auto-segmentation.In this paper

an edge statistic algorithm based on calculation of connected region is provided.This algorithm calculates the valid edge of the segmentation result

and it means that the max is accordant with the best segmentation.It has been proved by experiments that the algorithm has much better sensitivity than those methods based on entropy of image or on edge operator

and also has stronger robustness of noise.