基于地形调节植被指数的像元二分模型应用研究

The Applied Research on Dimidiate Pixel Model Based on TAVI

植被覆盖度是衡量地表植被状况的一个重要指标,归一化植被指数结合像元二分模型是一种通过遥感监测获取植被覆盖度的方法,使用广泛,但在山区会受到地形效应的影响。引入地形调节植被指数估算植被覆盖度,通过配对t检验发现其在山区具有良好的削弱地形效应作用,可用于山区的植被覆盖度反演。

Vegetation coverage is an important indicator of surface vegetation.Normalized vegetation index combined with dimidiate pixel model is one of methods to obtain vegetation surface coverage by remote sensing,it is widely used.But it will be affected by topographic effect in mountain area.In this paper,the vegetation coverage was estimated by using the TAVI.By paired t test,it was found that it had a good weakening of the topographic effect in the mountain area,and could be used to invert the vegetation coverage rate in the mountain area.