基于光能分配的遥感图像增强  

Remote Sensing Image Enhancement Based on Energy Distribution

作　　者：陈强[1] 纪则轩[1] 孙权森[1] 夏德深[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,南京210094

出　　处：《中国图象图形学报》2009年第11期2284-2291,共8页Journal of Image and Graphics

基　　金：国家自然科学基金项目(60805003;60773172);江苏省博士后基金项目(AD41158)

摘　　要：遥感图像对比度的下降主要是由于光学系统调制传递函数(MTF)的下降导致的,MTF反映了光学系统分配光能的特性。根据图像的对比度下降原理,提出了一种基于光能分配的遥感图像增强方法,其基本过程是首先将图像低频部分的光能进行抑制,然后通过Gamma校正将减少的低频部分的光能重新分配到高频部分,得到对比度提高的增强图像。实验结果表明,该方法实现简单,且取得了较好的增强效果,适用于遥感图像的增强。The contrast reduction of remote sensing images is mainly because of the reduction of the modulation transfer function（ MTF）of the optical system. And MTF represents the characteristic of the light energy distribution of the optical system. By analyzing the theory of contrast reduction, this paper presents a remote sensing image enhancement method based on energy distribution. Firstly, the image energy at the low frequency domain is decreased, and then the decreased image energy is allocated to the high frequency domain to obtain the enhancement result. The experimental results demonstrate that the proposed method is simple and effective, which is feasible for remote sensing image enhancement.

关 键 词：图像增强 光能分配 调制传递函数(MTF) 遥感图像 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]