为了从陆地卫星数据中选择能改善土地覆盖分类精度的通道,本文提出一精确、高效的方法。结果表明,亮度值重叠指数(BVOI)是覆盖类型之间亮度值重叠度的最佳测度。利用所有覆盖类型在每一通道内的重叠信息选择通道,不需要复杂的数学计算。在使用遥感数据进行土地利用/土地覆盖分类中,应用BVOI计算简单、概念清楚。 In order to select the terrestrial satellite data that can improve the accuracy of land cover classification, this paper presents an accurate and efficient method. The results show that the Brightness Overlap Index (BVOI) is the best measure of the overlap of brightness values ​​among the coverage types. Channels are selected using overlapping information of all coverage types within each channel, requiring no complicated mathematical calculations. In the classification of land use / land cover using remote sensing data, applying BVOI is computationally simple and conceptually clear.