光学学报, 2018, 38 (8): 0833001, 网络出版: 2018-09-06   

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 下载: 1549次

A Method for Measuring Surface Color Based on Spectral Tunable LED Light Source and Multispectral Imaging Technology
作者单位
温州大学数理与电子信息工程学院, 浙江 温州 325035
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.

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. Jinjin Chu, Guihua Cui, Yaowu Liu, Ting Xu, Xiukai Ruan, Qibo Cai, Yanhua Tan. 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.

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