Spectral matching imager using correlation image sensor and AM-coded multispectral illumination
Spectral matching imager using correlation image sensor and AM-coded multispectral illumination
复制标题
使用相关图像传感器和 AM 编码多光谱照明的光谱匹配成像仪
DOI：
10.1117/12.476778
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
H. Matsuyama
中科院分区：
文献类型：
--
作者：
A. Kimachi;H. Ikuta;Yusuke Fujiwara;H. Matsuyama
在2002年的《电子成像》中，我们提出了光谱数学成像器，它利用相关图像传感器实时地从场景中检测出具有特定光谱性质的目标。本文提出了另一种光谱匹配成像仪，它采用AM编码的多光谱照明，而不是以前使用的可变波长单色照明，以提高照明的功率效率。AM编码的多光谱照明由具有不同照明光谱的LED发出的光组成，这些光也用正交载波信号进行幅度调制。相关图像传感器的参考信号被创建为AM信号的加权和，该AM信号具有由在LED光谱的峰值波长处采样的参考光谱的值给出的权重。由于AM载波信号的正交性，相关图像传感器在每一帧中输出成像对象与参考材料之间的像素化光谱相关性。介绍了AM编码光谱匹配成像仪的原理和实现方法，并给出了一组掺氧化物彩色玻璃的初步实验结果。
In Electronic Imaging 2002 we proposed the spectral mathing imager, which detects an object having a particular spectral property out of a scene in real time using the correlation image sensor. This paper proposes another type of spectral matching imager that employs AM-coded multispectral illumination, instead of the variable wavelength monochrome illumination used previously, in order to increase power efficiency of the illumination. The AM-coded multispectral illumination consists of lights from LEDs with different illuminant spectra, which are also amplitude-modulated with orthogonal carrier signals. The reference signal to the correlation image sensor is created as a weighted sum of the AM signals with weights given by the values of a reference spectrum sampled at the peak wavelengths of the LED spectra. Owing to the orthogonality of the AM carrier signals, the correlation image sensor outputs the pixelwise spectral correlation between the imaged object and a reference material in every frame. The theory and an implementation of the AM-coded spectral matching imager are described and preliminary experimental results on a set of oxide-doped colored glass pieces are given.