陆地卫星专题制图仪TM的工作波段在可见光及红外波长范围内,对云层无穿透能力,因此,很可能研究区的TM图像局部地区被云层覆盖而无法得知地面情况。采用窗口数字镶嵌技术可以填补云层及其阴影遮掩所丢失的信息,恢复地物的本来面目。当TM图像局部有云时,可以设法将被云层覆盖的地区用MSS数据(或其它时相的TM数据)来充填,这实际上是开个“窗口”进 The Landsat TM charter operates in the visible and infrared wavelengths with no penetration into the clouds, so it is likely that some of the TM images in the study area are covered by clouds without knowledge of the ground conditions. The use of window digital mosaic technology can fill the cloud and its shadow to hide the lost information, to restore the original appearance of objects. When the TM image is partially cloudy, you can try to fill the area covered by the cloud with MSS data (or TM data from other phases), which is actually a “window” into