由于云对地球气候变化起着重要作用，对云进行监测是研究全球气候 变化的重要环节。目前，各国的气象专家和爱好者们都十分关注对云的监测研究，因此云检 测已经成为了当前的热点话题。利用日本的GMS-5气象卫星资料进行了云检测研究。采 用红外亮温法对云进行粗检测，然后利用相似离度法、空间一致性检测以及可见光反射率进行晴 空检测。最终结果表明，通过结合使用这三种方法进行云检测，能够很好地判断是晴空辐 射还是含云辐射。

Because cloud plays an important role in earth climate change, cloud monitoring is an important part in the research on global climate change. At present, the meteorological experts and amateurs pay more attention to the research on cloud monitoring. Therefore, cloud detection has become a topical issue at present. The data from the Japanese meteorological satellite GMS-5 are used for cloud detection research. Firstly, the infrared bright temperature method is used for coarse detection of cloud. Then, the methods of similar degree of consistency, space detection and visible light reflectivity are used to detect in clear sky. The final results show that the combination of these three methods in cloud detection can judge whether it is the clear sky radiation or the radiation from cloud well.