MODIS数据几何校正算法设计及其IDL实现  

Geometrical Correction of MODIS Data Based on IDL

作　　者：付必涛[1] 王乘[1] 曾致远[1] 

机构地区：[1]华中科技大学水电学院,湖北武汉430074

出　　处：《遥感信息》2007年第2期20-23,共4页Remote Sensing Information

基　　金：重大基础研究前期研究专项(2004CCA02500)

摘　　要：MODIS数据具有数据量大,波段多等特点,用现有遥感软件进行几何校正,人机交互多且耗时较长,导致图像处理效率低下。本文采用基于三角网的几何校正算法,在几何校正的过程中把影像分块,各块的校正算法相互独立,计算完毕后再进行拼接。本文作者用IDL(Interactive Data Language)编写了相关程序,运行结果表明,这种方法占用内存小,计算速度快,可以提高MODIS数据处理效率。Since MODIS data is featured with huge amount and multi- spectrum, it takes too much time and frequent I/O operation to correct them by RS software. This paper proposes a geometric correction algorithm based on triangular network. The input images are divided into several blocks and each block is calculated independently, and they are mosaicked together after calculation. By implementing the algorithm based on IDL（ Interactive Data Language） program, the results show that it takes less memory and improves the efficiency of data processing greatly.

关 键 词：MODIS 几何校正 IDL 三角网 

分 类 号：P237.3[天文地球—摄影测量与遥感]