An Estimation method of Vegetation Fraction by Using Unit Vectorized Reflectance and the Nonlinear Spectral Mixture Model

摘要

The aim of this paper is to estimate the mixture ratios of the endmembers for the Landsat-7/ETM+ image in urban area. The number of the endmembers is two: "Vegetation" and "Non-vegetation". The Nonlinear Spectral Mixture Model (NSMM) had been proposed by Somers (2009). Second-order interaction (e.g. second reflections) between endmembers had been considered by the NSMM. On the other hand, Oyamada (2012) had proposed the topsoil ratio using the unit vectorized reflectance to reduce the difference of brightness (sunny or shade places). In this paper, we have analyzed if NSMM is represented as the influence of second reflections by using the unit vectorized reflectance, and also have analyzed the enhanced NSMM which we had proposed.