“民以食为天”,粮食生产是关系到国计民生的大事,粮食作物生长状况的动态监测和产量及时、准确的预测,对于国家粮食政策的制定、价格的宏观调控以及对外粮食贸易都具有重要意义。传统的农作物估产采用人工区域调查方法,速度慢、工作量大、成本高。现代卫星遥感技术具有宏观、快速、准确、动态的优点,目前已被广泛应用于各种粮食作物产量的估算之中,成为卫星遥感与农业交叉领域的研究焦点。 “Food for the world”, food production is related to the national economy and the people’s livelihood, the dynamic monitoring of crop conditions and production of timely and accurate forecast, for the formulation of national food policy, macro-control of prices and foreign grain trade are important significance. The traditional method of estimating agricultural production using artificial regional survey, slow, heavy workload, high cost. Modern satellite remote sensing technology has the advantages of macroscopical, fast, accurate and dynamic. It has been widely used in the estimation of the output of various food crops and has become the focus of research in the field of satellite remote sensing and agriculture.