从NDVI序列检测植被“绿化”或“褐化”变化趋势的新方法
唐亮, 赵忠明, 唐娉

A new method for detection “greening” or “browning” change trend in vegetation from NDVI sequences
Liang TANG, Zhongming ZHAO, Ping TANG
图3 第4次迭代后的上、下包络线及其均值
Fig.3 Upper and lower NDVI envelope and its mean value after the fourth iteration