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一种高分辨率遥感影像阴影去除方法
引用本文:杨俊,赵忠明,杨健.一种高分辨率遥感影像阴影去除方法[J].武汉大学学报(信息科学版),2008,33(1):17-20.
作者姓名:杨俊  赵忠明  杨健
作者单位:1. 中国气象科学研究院雷电物理与防护工程实验室,北京市海淀区中关村南大街46号,100081
2. 中国科学院遥感应用研究所,北京市朝阳区大屯路3号,100101
基金项目:国家高技术研究发展计划(863计划) , 科技部专项基金
摘    要:基于阴影属性提出了一种全自动彩色影像阴影去除算法.首先将影像变换到HSI空间,依据阴影区域亮度值低和饱和度高的特性,结合小区域去除和数学形态学处理,得到精确的阴影区域.然后,分别对I、H、S分量图上各个独立阴影区域与其邻近的非阴影区域进行匹配补偿,再反变换回RGB空间,完成阴影去除操作.实验结果表明,该方法能在不改变非阴影区域信息的情况下,有效地去除阴影的影响.

关 键 词:HSI变换  阴影检测  阴影去除  高分辨率  遥感影像  去除方法  Remote  Sensing  Image  High  Resolution  Method  Removal  影响  情况  信息  结果  实验  除操作  反变换  补偿  匹配  分量  形态学处理  数学  小区域去除
文章编号:1671-8860(2008)01-0017-04
收稿时间:2007-10-20
修稿时间:2007年10月20

A Shadow Removal Method for High Resolution Remote Sensing Image
YANG Jun,ZHAO Zhongming,YANG Jian.A Shadow Removal Method for High Resolution Remote Sensing Image[J].Geomatics and Information Science of Wuhan University,2008,33(1):17-20.
Authors:YANG Jun  ZHAO Zhongming  YANG Jian
Abstract:The shadow on the high resolution remote sensing image influences the image quality badly. An automatic property-based approach is presented for shadow removal of color image. The RGB image is first transformed into HSI color space, according as shadow regions has lower luminance and higher saturation than non-shadowed regions, threshold detection and small regions removal and morphological algorithm are performed to get accurate shadow mask. Then the shadow regions are matched to their adjacent non-shadowed regions on I component, S component and H component respectively, and by inverse HSI transform to finish shadow removal. The experiment result shows that this method can remove the influence of shadow effectively and does not change the pixel value of non-shadowed regions.
Keywords:HSI transform  shadow detection  shadow removal
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