A Sensitivity Analysis and Accuracy Assessment of Different Water Extraction Index Models Based on ALOS AVNIR-2 Data
XIONG Jin-guo 1,2, WANG Shi-xin 1, ZHOU Yi 1
1.Institute of Remote Sensing Application, Chinese Academy of Sciences, Beijing 100101, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
In this study, spectral characteristics of water bodies and other objects in ALOS AVNIR-2 imagery in areas near Huizhou of Guangdong Province were analyzed. The impact of the threshold on the sensitivity of extracting water and the maximum precision of the four different water index models were studied. It is found that the water area in the image can be extracted well using these index models. The result shows that the application effects decrease in order of NDWI,NIR,NDVI and RVI. If the proper threshold is chosen,the overall accuracy can reach the highest and the value is nearly 98 % by using NDWI,which, moreover, is not sensitive to the threshold.
熊金国, 王世新, 周艺. 不同指数模型提取ALOS AVNIR-2影像中水体的敏感性和精度分析[J]. 国土资源遥感, 2010, 22(4): 46-50.
XIONG Jin-Guo, WANG Shi-Xin, ZHOU Yi.
A Sensitivity Analysis and Accuracy Assessment of Different Water Extraction Index Models Based on ALOS AVNIR-2 Data. REMOTE SENSING FOR LAND & RESOURCES, 2010, 22(4): 46-50.