Abstract：In the vegetation coverage area， the reflectance spectrum characteristics of vegetation and some minerals are similar， making the mineral alteration information difficult to be extracted effectively by the conventional remote sensing alteration extraction method. Firstly， the author used linear spectral unmixing method based on Landsat8 OLI data and took grassland in the southwest Bayan Obo as research area. Then， the vegetation reflectance value and intensity were subtracted from mixing pixels to realize spectrum rebuilding of rock and soil and suppression of the vegetation disturbance. Comparing the OLI data before and after vegetation disturbance suppression， altered hydrous mineral information were further extracted using Principal Component Analysis combined with field investigation. Results showed that the linear spectral unmixing method had good validity to suppress vegetation disturbance and the remote sensing altered mineral information extracted after the suppression of vegetation disturbance was more objective in the low-medium density grassland coverage area.
程思思,汪 冰,范 芳,付丽华,沈鸿坡,张 策. 基于混合像元分解的OLI影像草原植被覆盖区遥感岩矿信息提取研究[J]. 华中师范大学学报(自然科学版), 2019, 53(4): 575-581.
CHENG Sisi,WANG Bing,FAN Fang,FU Lihua,SHEN Hongpo,ZHANG Ce. Research on extraction of mineral information based on spectral unmixing method in grassland coverage area. journal1, 2019, 53(4): 575-581.
2019, Vol. 53 
