基于四通道多光谱图像采集系统的光谱估计算法  

Alorithm of spectral estimation based on multi-spectral imaging system with four channels

作　　者：杨晓莉[1,2] 杨卫平[1] 戴志福[3] 杨卫国[1] 张培[3] 冯洁[1] 孙波[1] 石俊生[1] 

机构地区：[1]云南师范大学物理与电子信息学院,昆明650092 [2]湖北民族学院理学院,湖北恩施445000 [3]红河学院,云南蒙自661100

出　　处：《光电子．激光》2009年第1期113-116,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60768002,60368001,60668001);云南省自然科学基金资助项目(2005F0033A,2004A0027M);湖北民族学院青年基金资助项目(MY2008Q010)

摘　　要：采用双CMOS多光谱成像系统来采集图像颜色信息,在以往的R,G,B三色通道系统的基础上通过1个黑白CMOS增加了1个灰度通道。通过实验研究发现,增加灰度通道后灰度信息加强,光谱重建精度提高,证明了四通道系统较优于三通道系统。特别是在加了适当的滤波片后,效果更明显,在训练样本的数据结果评议中,四通道系统与三通道系统相比较,均方根差平均值降低1.66%,相对误差平均值降低10.49%;在待测样本的评议中,均方根差平均值降低2.14%,相对误差平均值降低12.92%。此结果说明,黑白CMOS的增加是有效果的。A multi-spectral imaging system with dual-CMOS is adopted to obtain color information of a surface.In this system,R,G,B channels and a gray channel are established.The experimental result shows that the precision of the spectral reflectance reconstruction is improved by adding a gray channel.Especially after adding proper filters,the result is better.In evaluation of the disciplinal sample result,compared with only one CMOS system,mean RMS error(RMSE)has been decreased by 1.66%;and mean relative error(%R)has been decreased by 10.49%.In evaluation of testing samples results,compared with only one CMOS system,RMSE has been decreased by 2.14%;and%R has been decreased by 12.92%.Therefore,it is useful to add a gray channel of a monochrome CMOS.

关 键 词：双CMOS 光谱重建 灰度通道 PCA 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]