Abstract:
The Log-linear model and Stumpf model are most commonly water depth remote sensing inversion models, and a kind of improved stumpf model has been developed these years.In this paper, We choose Wuzhizhou and Penang as research areas based on the different water types and carry out the following water depth inversion based on GeoEye-1 multispectral image:Firstly, verify the inversion ability of the Improved Stumpf model.Secondly, do the analysis and comparison of three models' inversion ability from three dimensions.Here are the results:(1) The improved Stumpf model can reflect the changes of underwater terrain, the differerces between the inversion water depth and real water depth are mostly controlled within 2 m, especially the inversion effect in the 10~20 m is better, and the water depth differences are float around 1 m. (2) Multi-dimensional analysis:①The overall accuracy evaluation:the improved stumpf model has the highest inversion accuracy in Wuzhizhou with clear water, whose
MAE is 1.56 m and
MRE is 13.5%, the stumpf model's
MAE is 1.71 m and
MRE is 14.8%, while The logarithmic band ratio model is inferior to above.In Penang with turbid water, the improved stumpf model also has the highest accuracy while the accuracy of the logarithmic linear model is decreased.②The accuracy of differenct depths:The accuracy of three models in Wuzhizhou showed an increasing trend with the increase of the water depth.In Penang, the accuracy of Stumpf model and the improved Stumpf model are similar to those of the Wuzhizhou, while the accuracy of the logarithmic linear model has a significant decrease in 15~20 m depths.③Model stability:The improved stumpf model has the smallest variation range and the highest inversion accuracy, and has relatively stable inversion ability in different water environment; The stumpf model follows next, while The log-linear model has a large variation about inversion results in different water quality environments especially in the turbid water.