遥感数字图像的无缝镶嵌

在遥感图像的应用中,当研究区处于几幅图像的交界处或研究区较大需多幅图像才能覆盖时,常常需要把覆盖研究区的那些图像进行配准并把这些图像镶嵌起来,才能更好地统一处理、解译分析和研究.以航空像片为例,利用图像处理软件ERMAPPER 6.2对图像进行数字镶嵌并作无缝接边处理.结果表明:这样,大大改善了镶嵌后图像的质量,解决了手工镶嵌图像中接缝偏移、色调不均匀、地质界线延伸、影像错位等许多问题 (大幅图像尤其明显),为后期的图像处理创造良好的基础.目前出现的米级高分辨率的卫星图像同本次采用的航空像片在波段和分辨率上具有相似性,因此本研究对这些高分辨率卫星图像的镶嵌同样适用.

Seamless Mosaicking of Digital Remote Sensing Images

In the application of remote sensing, a mosaic is usually needed. It is an assemblage of two or more adjacent or overlapping images to create a continuous representation of the area covered by the images. It is necessary when the target area covers large region and easy to process, interpret and study. Traditionally, mosaic is made manually but usually it cannot part with errors such as mosaic displacement, uneven hue, boundary stretching and disordered objects, especially in large-size mosaicked images. These errors reduce the creditability of analysis and interpretation. This paper, however, mosaicks the digital aerial photos by ERMAPPER6.1 and processes it seamlessly. This method improves the quality of the mosaicked image greatly and offers good and clear image for afterward processing. High-resolution satellite images have the spectrum distribution and resolutions similar to the aerial photos used here, so this method is also applicable to them.