基于光谱压缩的线阵推帚式超光谱成像机理研究

项目名称： 基于光谱压缩的线阵推帚式超光谱成像机理研究

项目编号： No.11204014

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 李欢

作者单位： 北京空间机电研究所

项目金额： 26万元

中文摘要： 超光谱成像仪目前在国内外均采用面阵探测器，在沿轨方向获取目标的光谱信息，在穿轨方向获取目标的空间信息。由于某些发达国家对我国实行高技术封锁，目前我国在大规模、高帧频面阵探测器方面获取困难，今后的十多年我国几乎无法获得或制造出高性能的面阵探测器，极大程度限制了我国超光谱成像技术的空间应用。 本项目紧跟国际前沿发展趋势，另辟蹊径，探索新型的计算光谱成像方法，提出基于光谱压缩的线阵成像体制超光谱成像机理研究，即将原来的光谱维信息稀疏采样后压缩成一列，再通过特征解耦方法对压缩数据进行高精度重构，实现利用目标的低维投影，重建目标的高维数字模型，采用线阵探测器替代面阵探测器获取目标的空间和光谱数据立方体，大大降低了探测器规模及成像系统的复杂度。这对于提高国内数字遥感技术的水平，降低对国外同类产品的严重技术依赖，满足国内对超光谱遥感图像的迫切需求，具有极其重要而深远的理论意义和广泛的应用价值。

中文关键词： 超光谱成像；压缩感知；线阵探测器；光谱压缩；

英文摘要： Hyperspectral imagers use a 2-dimensional detector domestically and abroad.Spectral data is acquired in across-orbit direction,and spatial information is acquired in perpendicular to the moving satellite.Because some developed countries make a high technology blockage to us, we are difficult to get 2-dimensional detectors with big dimension,high frame rate at the present time.For the next decade, we can hardly get or manufacture 2-dimensional detectors with high capability.That restricts application of hyperspectral imagers in space exceedingly internally. This project follows closely internationally advanced developed direction, find another excellent approach to new method of computational spectral imaging.Bringing forward research on mechanism of hyperspectral imagers with linear detector imager system on spectrum compressed. Compressing the quondam spectral information to one row after signal sparse representation.By the method of characteristics decoupling, making high precision reconstruction of compressed data.Using low dimension projection of the objects to reconstruct high dimension numeral model of the objects. Making use of an 1-dimension detector instead of a 2-dimension detector to get a 3-dimensional data cube holding the spectral information and the spatial information of each ground object.

英文关键词： hyperspectral imaging；compressive sensing；linear detector；spectrum compressed；