混合像元是遥感技术向定量化深入发展的主要障碍之一。混合像元分解作为解决混合像元问题的有效手段,虽然可以得到像元内的地物丰度,却不能得到更高空间分辨率的地物分类结果。亚像元定位是利用地物的空间分布特征确定不同地物在混合像元中具体空间位置,获取更高空间分辨率地物分类图的过程。亚像元定位可 Mixed pixel is one of the major obstacles to the development of quantitative remote sensing technology. Mixed pixel decomposition as an effective means to solve the mixed pixel problem, although can get the abundance of features within the pixel, but can not get a higher spatial resolution of terrain classification results. The sub-pixel location is the process of using the spatial distribution feature of the object to determine the specific spatial position of different objects in the mixed pixel and to obtain the object classification map with higher spatial resolution. Sub-pixel positioning can be