MODIS图像的薄云透明云检测

THE THIN AND TRANSPARENT CLOUD DETECTION OF MODIS IMAGE

基于云与土壤、植被、冰雪、水体等目标的光谱差异,本文结合MODIS影像的波段范围,提出了一种对不同下垫面通用的多光谱云检测算法。同时,本文还加入了大气可降水量指标,用以对基本云区进一步检测,最终实现薄云、透明云的检测。试验证明:通过水汽反演结果的不同,薄云、透明云能够被有效检测。

Taking account of the different object spectrum specificity （cloud , soil , vegetation, water and so on） and MODIS instrument channel characteristics, this article proposed the multi-spectral synthesis method for cloud detection for MODIS images. The method is applicable to the different scenes. And moreover ,Precipitable Water Vapor（PWV） is added to detect the thin and transparent cloud. The result shows that the thin and transparent cloud is detected by the content of water.