遥感数据环境噪声等效辐射率提取方法  

A methodology for retrieval of environmental noise equivalent radiance of remote sensing images

作　　者：刘丙新[1] 李颖[1] 

机构地区：[1]大连海事大学环境信息研究所,辽宁大连116026

出　　处：《大连海事大学学报》2012年第3期105-106,111,共3页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(41071260);大连海事大学2011-2013年科技创新团队及重点培育资助项目(2011ZD017)

摘　　要：为获取遥感数据的环境噪声特性,提出基于简化的自动化局部收敛定位算法(ALCL)的环境噪声等效辐射率提取方法.通过对Hyperion数据进行自动化局部收敛定位指数计算,得到遥感数据自动化局部收敛定位指数密度分割图.分别选取点A、B,点A的自动化局部收敛定位指数值小于点B.分别计算A、B两点随窗口尺寸变化时的平均辐射率值和环境噪声等效辐射率,二者平均辐射率值随窗口尺寸变化较小,但B点环境噪声等效辐射率随窗口尺寸变化发生较大幅度增加,而A点环境噪声等效辐射率相对稳定.结果表明,自动化局部收敛定位算法能够有效实现环境噪声等效辐射率最佳提取区域的选择.This paper proposed a methodology for retrieval of environmental noise equivalent radiance of remote sensing images based on the simplified automated local convergence locator（ALCL）.A Hyperion image is processed using the ALCL,and the density segmentation image with the value of ALCL is obtained.Point A with a smaller ALCL value and point B with a larger one are selected to calculate the changes in the value of the average radiance and the environmental noise equivalent radiance along with the increase of the window size respectively.The average radiance of both A and B has little changes.The value of environmental noise equivalent radiance of point A changes very little,which has great variations at point B.Result shows that the proposed method is practical and effective,which can be used to locate the most suitable spatial area for environmental noise equivalent retrieval of a remote sensing image.

关 键 词：遥感数据 环境噪声 等效辐射率 提取 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]