“HJ-1A”CCD图像云检测算法的研究

In the process of getting geo-spatial information with remote sensing tools, cloud is a serious obstacle in radiation transmission, and will largely influence the quality of information and reduce data utilization. In order to promote the application of \\\"HJ - 1A\\\" CCD data, on base of summing up commonly used method to clouds, aiming at the band characteristics of \\\"HJ - 1A\\\" CCD data, the article analyzes the clouds characteristics in different spectral range, and based on spectral threshold , develops cloud detection algorithm for surface underlaying is water. Experimental results show that this method is effective, and has achieved the business applications.