高光谱图像的分布式压缩感知成像与重构

王忠良; 冯燕; 肖华; 王丽

doi:10.3788/OPE.20152304.1131

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高光谱图像的分布式压缩感知成像与重构

信息科学 | 更新时间：2020-08-13

- 高光谱图像的分布式压缩感知成像与重构
- Distributed compressive sensing imaging and reconstruction of hyperspectral imagery
- 光学精密工程 2015年23卷第4期页码：1131-1137
- 作者机构：
  
  1. 西北工业大学电子信息学院,陕西西安,710072
  2. 铜陵学院电气工程学院,安徽铜陵,244000
  3. 铜陵学院数学与计算机学院,安徽铜陵,244000
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.61071171)();安徽省高等学校省级自然科学研究基金资助项目(No.KJ2013B298)();西北工业大学博士论文创新基金资助项
- DOI：10.3788/OPE.20152304.1131
  中图分类号： TP751
- 收稿日期：2014-11-21，
  
  修回日期：2015-01-12，
  
  纸质出版日期：2015-04-25
- 稿件说明：
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王忠良, 冯燕, 肖华等. 高光谱图像的分布式压缩感知成像与重构[J]. 光学精密工程, 2015,23(4): 1131-1137

WANG Zhong-liang, FENG Yan, XIAO Hua etc. Distributed compressive sensing imaging and reconstruction of hyperspectral imagery[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1131-1137
王忠良, 冯燕, 肖华等. 高光谱图像的分布式压缩感知成像与重构[J]. 光学精密工程, 2015,23(4): 1131-1137 DOI： 10.3788/OPE.20152304.1131.

WANG Zhong-liang, FENG Yan, XIAO Hua etc. Distributed compressive sensing imaging and reconstruction of hyperspectral imagery[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1131-1137 DOI： 10.3788/OPE.20152304.1131.

摘要

根据高光谱数据的特点

提出了一种基于像元的分布式压缩采样模型来实现高光谱图像的有效压缩采样与重构。搭建了能实现该模型的压缩采样光谱成像系统

并研究了用于该系统成像的重构算法。在图像采集阶段

将高光谱数据分为参考像元和压缩感知像元;地面像元的辐射能通过棱镜进行谱带分离

再利用数字微镜器件实现谱带的线性编码。对压缩感知像元进行低采样率的线性编码

对参考像元进行采样率为1的线性编码。压缩采样数据重构时

不再采用传统方法直接重构高光谱数据

而是利用线性混合模型将重构高光谱数据转换成端元提取和丰度估计

然后根据重构的端元和丰度恢复原数据。对比实验表明

在压缩采样数据为总数据的20%时

重构的平均信噪比提高了10 dB。所设计的成像系统应用压缩感知理论减少了采集的数据量

采样方式简单

可应用于星载或机载的高光谱压缩感知成像。

Abstract

According to the characteristics of high spectral data

a distributed compressed sampling model based on pixels was proposed to realize the efficient compressive sampling and reconstruction. A spectral imaging system based on distributed compressed sampling was established and a reconstruction algorithm for this system was investigated. In the image acquisition stage

the hyperspectral data were divided into key pixels and compressive sensing pixels. The ground pixels were separated along the spectral direction by a prism. Then

the linear encoding between the spectral bands was realized by a digital micro-mirror device. The compressive sensing pixels were coded with a low sampling rate

and the key pixels were coded by a sampling rate of 1. In the reconstruction of the compressive sampled data

the traditional compressive sensing reconstruction methods which recover hyperspectral data directly were abandoned. However

the linear mixed models were used to convert the hyperspectral data reconstruction into an endmember extraction and an abundance estimation

then

the hyperspectral data were recovered by using the extracted endmember and estimated abundance. The comparison experiments show that the reconstruction average signal noise rate by proposed algorithm is improved about 10 dB when the used data are 20% that of total data. The system is suitable for the spaceborne or airborne hyperspectral compressive sensing imaging for its less data collected and simple sampling method.

关键词

Keywords

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