多角度下蜡染布料的多光谱成像研究  

Multispectral imaging study of batik cloth under multi-angle

作　　者：杨舒明 冯洁[1] 刘鑫[1] 林立波[1] 

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《光学仪器》2016年第4期339-345,共7页Optical Instruments

基　　金：国家自然科学基金资助项目(60968001;60768002);云南省自然科学基金项目(2009CD047)

摘　　要：在400？720 nm 波段范围,采用基于液晶可调谐滤波器（LCTF）和CMOS相机组合的多光谱成像系统对蜡染的布料进行每隔5 nm 成像.讨论了多光谱成像的基本原理和多角度下彩色图像的实现过程,并且通过计算光谱反射率展示了光谱合成颜色的基本方法.对再现后的橘色、绿色、白色、蓝色、黄色、黑色六种颜色色块进行多角度下明度值、彩度值的分析.实验结果表明,六种颜色的明度值均呈现正态分布,并且通过计算六种颜色色块的色品坐标值a ＊ 、6＊ 和彩度4 的均方差,得出在一定的范围内,六种颜色的色品坐标值a ＊、6 ＊ 近似不随角度变化,其中蓝色和黑色随角度的变化更小,近似于一条直线.Multispectral images of batik cloth at the wavelength range of 400-720 nm with an intervalof 5 nm are captured by using a multispectral imaging system which mainly consists of liquid crystaltunable filter （LCTF） and CMOS camera. The paper discussed the basic principle of multispectralimaging and analyzed the implementation process of color image under multi-angles. Besides that, thepaper showed the basic approach of synthetic color spectrum by calculating the spectral reflectance.Brightness values, chroma values under multi-angle of the reproduction of the orange, green, white,blue, yellow, black were analyzed The results proved that all the six-color brightness valuesshowed a normal distribution. Meanwhile, by calculating the six-color chromaticity coordinate valuesa＊ , b＊ and of standard deviation, the chromaticity coordinates a＊ and b＊ are merely changed inangle. Among them, the change of blue and black is smaller than the others, approximately as astraight line.

关 键 词：光谱学 多光谱成像 多角度 靖染布料 

分 类 号：O433.4[机械工程—光学工程]