To solve low accuracy and time-consuming problems in thresholding,an iterative multi-level image segmentation method based on fuzzy set theory was proposed.The interactive top-down region dividing strategy was used considering characteristics of gray level distribution and neighborhood information of each pixel in the pre-dividing region.And fuzzy comprehensive evaluation was used instead of segmentation thresholds to classify each pixel in the image reasonably.The method overcomes the limitations and compl...