关键词: 合成孔径雷达（SAR）图像, 模糊理论, 自适应越渡点, 对比度增强

Abstract: SAR image always has small dynamic range, low contrast and details are presented in a very low luminance region, which limits the further processing of SAR image. Thus a new fuzzy image contrast enhancement method based on adaptive crossover point is presented. It analyzes the limits of the classical fuzzy enhance method, and proposes the adaptive crossover point and the new enhancement operator to make it adaptive for SAR image by using the features of the image’s histogram. The performances of the method are assessed by a series of experiments.

Key words: Synthetic Aperture Radar（SAR） image, fuzzy theory, adaptive crossover point, contrast enhancement