基于多通道窄带滤光片和彩色图像传感器的实时多光谱成像系统  

Real-time Multi-spectral Imaging System Based on Multi-channel Narrow-band Filter and Color Image Sensor

作　　者：廖乘胜[1] 吴正[1] 曾立波[1] 吴琼水[1] 

机构地区：[1]武汉大学电子信息学院,武汉430079

出　　处：《光子学报》2017年第4期94-102,共9页Acta Photonica Sinica

基　　金：国家科技支撑计划课题(No.2011BAF02B02);中国石油科技创新基金(No.2012D-5006-0102)资助~~

摘　　要：针对复染情况的出现,采用多通道窄带滤光片与彩色图像传感器相结合的方式,设计了一种多光谱成像方法.使用多通道窄带滤光片对光源进行分光,采用多元线性回归方法建立多光谱剥离模型,并对彩色图像传感器输出的多个单色光混叠响应进行剥离,通过FPGA实现多光谱图像的实时剥离运算和输出.实验结果表明:多通道窄带滤光片的半高宽为12nm/15nm/20nm,其透射光是三个不同波段的窄带单色光;在检验水平为0.01情况下的模型具有较高的准确性;具有相同光谱特征的物质在同一波段的灰度图像上特征一致,同一物质在不同波段上的灰度图像特性差异较大.With the emergence of counter-stains,a multi-spectral imaging method based on the multichannel narrow-band filter and color image sensor was proposed in this paper.Firstly,a multi-channel narrow-band filter was used to separate the light source.Then,the multi-spectral stripping model was established by using the multiple linear regression method to separate the monochromatic light aliasing response from the color image sensor.The multi-spectral image is real-time delaminated and output by FPGA（Field Programmable Gate Array）.The experimental results show that,the Full Width at Half Maximum（FWHM）of the multi-channel narrow-band filter is 12 nm/15 nm/20 nm,and the transmission light is really a narrow-band monochromatic light in three different wavelengths;the model has high accuracy when the test level is 0.01;the substance with the same spectral characteristics has a consistent feature on the same band grayscale image and the same substance has an obvious different feature on different bands grayscale image.

关 键 词：多光谱成像 多通道窄带滤光片 彩色图像传感器 多光谱图像剥离模型 FPGA 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]