关键词: 路面破损图像, 模糊增强, 模糊隶属度函数, 渡越点

Abstract: According to the shortcomings of traditional fuzzy-enhancement algorithm used to road damaged image，such as enhancement effect is not obvious，unable to divide the diseased region from background of gray area which overlapping the background，hard to set the control factor，difficult to compute.A new fuzzy-enhancement algorithm is proposed to overcome these drawbacks.By designing a new fuzzy membership function which makes the pixel gray value in the divided image fully and meticulously reflect to membership，the enhancement effects can be obtained during a few times of computer.In the fuzzy inverse mapping，the use of gray expansion of the inverse transforms function can improve the enhancement effect；eliminate the cut-off gray-scale brought about by the loss of information.The new algorithm for enhancing multi-gray-scale image of the damaged road surface can access to a very good result，and the control parameters don’t need man-made settings.

Key words: road damaged image, fuzzy-enhancement, fuzzy membership function, crossover point