基于ERDAS IMAGING软件的TM影像几何精校正方法初探——以塔里木河流域为例

DISCUSSION OF METHOD OF TM IMAGERY GEOMETRIC PRECISION CORRECTION SUPPORTED BY ERDAS IMAGING SOFTWARE——TAKING TARIM RIVER BASIN AS AN EXAMPLE

遥感图像的几何精校正一直是人们所关注的问题。本文初步探讨了利用ERDASIMAGING软件对塔里木河流域TM影像进行几何精校正的方法。ERDASIMAGING软件进行几何精校正具有操作简便、实用性强、速度快、几何精度高等特点。

Remote sensor imagery geometric precision correction is paid attention by people at all times. It is an indispensable step in the course of imagery processing. If its precision is low, the procession of imagery disposal of next phase will be influenced. However, in previous work, people found that the operation of imagery geometric precision correction is tedious and boring, its operational process is expatiatory, its efficiency is low, and it is difficult to make its precision up to the mustard. In this paper, a method of TM imagery geometric precision correction based on ERDAS IMAGING is discussed, which takes Tarim river basin as example. In this paper, a method of polynomial geometric precision correction is used. Because the topography of Tarim river basin is flat, this method is efficient. The precision can meet request, wherever the speed of correction is quicker. ERDAS IMAGING software used to correct image has many characteristics consisted in operational simpleness and convenience, practicality, speediness and high precision. Geometric precision correction provides technological preparation for TM imagery processing.