地物三维结构的像元混合辐射响应

大气与环境光学学报 ›› 2021, Vol. 16 ›› Issue (6): 457-470.

• 大气光学 • 下一篇

地物三维结构的像元混合辐射响应

崔文煜1, 汪兰霞1,2, 易维宁1∗

1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院通用光学定标与表征技术重点实验室, 安徽合肥 230031; 2 中国科学技术大学, 安徽合肥 230026

收稿日期:2020-06-30 修回日期:2021-04-20 出版日期:2021-11-28 发布日期:2021-11-28
通讯作者: E-mail: yiwn@aiofm.ac.cn E-mail:yiwn@aiofm.ac.cn
作者简介:崔文煜 (1985 - ), 安徽合肥人, 博士, 副研究员, 主要从事遥感信息处理方面的研究。 E-mail: cuiwenyu@aiofm.ac.cn
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 41601379)

Pixel Mixed Radiation Response of Three-Dimensional Structure of Ground Objects

CUI Wenyu1, WANG Lanxia1,2, YI Weining1∗

1 Key laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Received:2020-06-30 Revised:2021-04-20 Published:2021-11-28 Online:2021-11-28

摘要/Abstract

摘要： 地物三维结构在像元尺度下的光学辐射特征并不等同于其表面材质的反射特性，这给基于图像信息的目标特征提取与识别造成困难。结合对三维几何体的外场零视距测量实验, 分析了地物几何结构对像元综合反射率的影响效应。基于线性混合像元模型, 尝试加入方向辐射特性、光照阴影和端元分布等修正因子进行改进。结果表明, 较之于目前广泛使用的线性混合模型, 改进模型对像元综合反射率的计算精度有所提高, 相对误差由原先的 13.08% 平均减小至 8.79%。鉴于三维异质结构混合像元综合辐射作用的复杂性, 改进方法的完备性和模型普适性有待进一步研究和验证。

关键词: 目标特性, 混合像元, 三维结构

Abstract: The radiation response of three-dimensional structure of ground objects is different from the reflection characteristics of their surface material at the pixel scale, which makes it difficult to extract and recognize the objects′ imaging features. Combined with the field experiment of the zero sight distance measurment of three-dimensional (3D) geometry, the influence of geometric structure on the composite reflectance of image pixels is analyzed. Based on the linear mixed model, some correction factors such as directional reflection characteristics, light shadow and end-member distribution are introduced into the model to improve its function. The results show that compared with the widely used linear mixed model, the accuracy of the improved model is increased to a certain extent for calculating the composite reflectance of the mixed pixel, and the relative error is reduced from 13.08% to 8.79%. In view of the complexity of the synthetic radiation effects of the 3D heterostructure mixed pixels, the completeness and universality of the improved model need to be further studied and verified.

Key words: target characteristics, mixed pixel, three dimensional structure

中图分类号:

O436

崔文煜, 汪兰霞, 易维宁∗. 地物三维结构的像元混合辐射响应[J]. 大气与环境光学学报, 2021, 16(6): 457-470.

CUI Wenyu, WANG Lanxia, YI Weining∗. Pixel Mixed Radiation Response of Three-Dimensional Structure of Ground Objects[J]. Journal of Atmospheric and Environmental Optics, 2021, 16(6): 457-470.

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地物三维结构的像元混合辐射响应

Pixel Mixed Radiation Response of Three-Dimensional Structure of Ground Objects

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