关键词: 红外图像, 模糊最大熵, 图像增强, 模糊逻辑

Abstract: Considering the characteristics of low luminance，low contrast and the inconspicuous difference between targets and backgrounds in infrared images，an enhancement method based on maximal fuzzy entropy and improved adjustment function is designed.To enhance the target area in infrared images，firstly，an optimal threshold is searched through the maximal Fuzzy-Entropy criterion，and a non-linear stretching method in fuzzy sets is carried out respectively to the pixels on both sides of the threshold.Results of the experiment indicate that the method could well improve the contrast of infrared images，the targets of which are outstanding from the backgrounds，thus strengthening the details of targets and suppressing background noises in the infrared images．

Key words: infrared images, maximal fuzzy entropy, image enhancement, fuzzy logic