关键词: 数字医学图像, 直方图均衡, 同态滤波, 多尺度Retinex方法, 平滑传导函数, 类似Retinex方法, 变空间拉伸, ,

Abstract: The digital medical image has its own particularity，in order to diagnose correctly disease，the medical image need be enhanced.According to the particularity，a similar method of Retinex to enhance the images is proposed.In the method，the images are smoothed by a smoothing conduction function which consists of gradient and context.The images are enhanced by the method，and the enhanced images are operated twice by transformed space stretching.Experiments and analysis show that the method is obviously better than Histogram Equalization，Homomorphic Filtering and multi-scale Retinex.

Key words: digital medical image, Histogram Equalization, Homomorphic Filtering, multi-scale Retinex, smoothing conduction function, similar method of Retinex, transformed space stretching