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一种基于光谱可调LED光源和多光谱成像技术的物体表面颜色测量方法

A Method for Measuring Surface Color Based on Spectral Tunable LED Light Source and Multispectral Imaging Technology

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摘要

针对传统多光谱成像颜色测量系统光谱反射率重建算法计算量大、操作繁琐耗时、成本高等缺点,提出一种由LED主动照明光源和黑白高速相机构建的多光谱成像颜色测量系统。采用多个单色LED拟合出相对光谱功率分布与相机光谱灵敏度曲线成倒数关系的照明光源,并利用黑白相机的输出响应直接重建物体的光谱反射率。实验结果表明,与分光光度计测量结果相比,该方法测量Macbeth ColorChecker 24标准色卡的光谱反射率的平均误差在2.3个CIELAB色差左右。该系统具有原理简单可行、不需要滤光片、光谱反射率重建算法简单快速等优点。

Abstract

To overcome the problems of traditional multispectral imaging system, such as sophisticated algorithm and time-consuming for reflectance reconstruction, and high cost etc., we present a multispectral imaging system for measuring colors by using LEDs illumination and monochrome high-speed camera. Multiple monochrome LEDs are used to fit lighting source and to ensure that the spectral power distribution of the source is reciprocal of the spectral sensitivity curve of monochrome high-speed camera, and then the spectral reflectance of the object is reconstructed by using the camera response directly. The experimental results show that compared with a spectrophotometer, the method can achieve an average of 2.3 CIELAB color difference for 24 Macbeth ColorChecker chart. The whole system is simple and feasible, and does not need filters, and the spectral reflectance reconstruction algorithm is simple.

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中图分类号:O432.3

DOI:10.3788/AOS201838.0833001

所属栏目:视觉与色彩

基金项目:国家自然科学基金(61775170,61671329,61501331)、浙江省自然科学基金(LY14F010002)

收稿日期:2018-01-24

修改稿日期:2018-03-05

网络出版日期:2018-03-21

作者单位    点击查看

褚金金:温州大学数理与电子信息工程学院, 浙江 温州 325035
崔桂华:温州大学数理与电子信息工程学院, 浙江 温州 325035
柳耀武:温州大学数理与电子信息工程学院, 浙江 温州 325035
徐婷:温州大学数理与电子信息工程学院, 浙江 温州 325035
阮秀凯:温州大学数理与电子信息工程学院, 浙江 温州 325035
蔡启博:温州大学数理与电子信息工程学院, 浙江 温州 325035
谈燕花:温州大学数理与电子信息工程学院, 浙江 温州 325035

联系人作者:崔桂华(gcui@wzu.edu.cn)

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引用该论文

Chu Jinjin,Cui Guihua,Liu Yaowu,Xu Ting,Ruan Xiukai,Cai Qibo,Tan Yanhua. A Method for Measuring Surface Color Based on Spectral Tunable LED Light Source and Multispectral Imaging Technology[J]. Acta Optica Sinica, 2018, 38(8): 0833001

褚金金,崔桂华,柳耀武,徐婷,阮秀凯,蔡启博,谈燕花. 一种基于光谱可调LED光源和多光谱成像技术的物体表面颜色测量方法[J]. 光学学报, 2018, 38(8): 0833001

被引情况

【1】傅军栋,陈晴,邱运霞,叶聪. 基于光能传递方法的室内光环境模拟. 激光与光电子学进展, 2019, 56(11): 111502--1

【2】杨秋兰,万晓霞,肖根生. 基于偏最小二乘法的多光谱降维算法. 激光与光电子学进展, 2020, 57(1): 13003--1

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