Nonlinear mixture model of mixed pixels in remote sensing satellite images based on Monte Carlo simulation

被引:24
|
作者
Arai, Kohei [1 ]
机构
[1] Saga Univ, Dept Informat Sci, Saga 8408502, Japan
关键词
mixed pixel; nonlinear mixing pixel model; Monte Carlo simulation;
D O I
10.1016/j.asr.2007.04.096
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
A nonlinear mixture model for the interpretation of mixed pixels in remote sensing satellite images is proposed. The proposed model is a Monte Carlo ray-tracing model that takes into account interactions among the ground cover materials (multiple reflections among the materials oil the surface). The proposed model also takes into account topographic features (slope) of the ground surface. As an example, Top of the Atmosphere (TOA) radiance of mixed pixels of forested areas which are composed of grasses and trees are simulated with the proposed model and compared to actual remote sensing satellite data of ASTER/VNIR over these forested areas. It was found that the influence due to multiple scattering interactions between trees depends oil the tree distance and ranges from 8% to 10%). It is also found that the proposed model is useful to interpret mixed pixels. Namely, it is suggested that actual reflectance of the trees is higher than apparent reflectance that is calculated with the satellite data. Also it is suggested that it is possible to estimate forest parameters such as tree distance, tree shape. (c) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1715 / 1723
页数:9
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