摘要
内蒙古大兴安岭快鸟影像中树木阴影会对树种、郁闭度等林分因子提取产生不利影响,因此对影像进行增强处理消除阴影,是十分必要的。本文采取直方图均衡化、Gamma校正、同态滤波、Retinex增强4种方法对影像进行增强处理,对处理后影像的均值、标准差、信息熵、平均梯度、边缘强度5项客观指标进行评价。
The tree shadows can badly influence the extraction of tree species and canopy density in quick bird ima- ges in the Greater Xing＇ an Mountains, Inner Mongolia. It＇ s necessary to enhance the images and eliminate the shadow. In this paper, the images have been enhanced by use of histogram equalization, Gamma correction, homo- morphic filtering and Retinex enhancement, and the objective indexes of mean value, standard deviation, informa- tion entropy, average gradient and edge strength have been evaluated after treating the images.
出处
《内蒙古林业科技》
2015年第2期32-35,共4页
Journal of Inner Mongolia Forestry Science and Technology
基金
天然林保护等林业工程生态效益评价研究(编号:201304308)资助
关键词
大兴安岭林区
快鸟影像
图像增强
评价指标
the Greater Xing＇ an Mountains
quick bird image
enhancement of image
evaluation index
