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基于数码相机图像的室内照明眩光测量方法研究

Method for Glare Measurement Based on a Digital Camera Image in Interior Lighting

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摘要

针对室内照明, 提出了一种基于数码相机图像的眩光测量方法。系统推导了眩光源位置指数、立体角、眩光源平均亮度的解析表达式, 采用自适应阈值方法提取眩光源轮廓信息, 并对实际办公室照明场景的统一眩光评价指数(UGR)进行计算与分析。实验结果表明:由该方法计算的位置指数、立体角、眩光源平均亮度的平均相对误差分别为1.319%, 4.296%, 3.001%; 当背景亮度为12.910 cd·m-2时, UGR的计算值为12.606, 其相对误差为4.326%。该方法计算简单、精度高, 易于硬件实现, 可应用室内照明的眩光测试与分析, 并为开发方便、快捷的眩光测试系统提供了理论支撑。

Abstract

A digital imaging method is proposed to measure the uncomfortable glare in interior lighting. Our study includes the systematic derivation of three parameters: the position index, solid angle from the viewer′s perspective, and average luminance of glare source. To extract the profile information of the lighting sources, an adaptive threshold method was employed. The Unified Glare Rating (UGR) was calculated and analyzed with a digital camera image of actual office lighting conditions. The results show that the mean relative errors of the obtained position index, solid angle, and average luminance of the glare source were equal to 1.319%, 4.296%, and 3.001%, respectively. For a background luminance of 12.910 cd·m-2, the calculated value of the UGR was equal to 12.606, with a relative error of 4.326%. The advantages of this method are its simple calculations, high accuracy, and easy implementation. By applying our method to the glare test in indoor lighting, a theoretical framework for the development of a convenient and fast glare test system can be constructed.

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中图分类号:TM923

DOI:10.3788/lop56.022201

所属栏目:光学设计与制造

基金项目:国家自然科学基金(61504095)、天津市教委科研计划项目(自然科学)(2017ZD06)、天津市高等学校创新团队培养计划(TD13-5035)

收稿日期:2018-06-28

修改稿日期:2018-07-15

网络出版日期:2018-08-02

作者单位    点击查看

田会娟:天津工业大学电气工程与自动化学院, 天津市电工电能新技术重点实验室, 天津 300387大功率半导体照明应用系统教育部工程研究中心, 天津 300387
洪振:大功率半导体照明应用系统教育部工程研究中心, 天津 300387天津工业大学电子与信息工程学院, 天津 300387
郝甜甜:大功率半导体照明应用系统教育部工程研究中心, 天津 300387天津工业大学电子与信息工程学院, 天津 300387
张辉:天津工业大学电气工程与自动化学院, 天津市电工电能新技术重点实验室, 天津 300387大功率半导体照明应用系统教育部工程研究中心, 天津 300387

联系人作者:田会娟(tianhjgx@126.com)

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引用该论文

Tian Huijuan,Hong Zhen,Hao Tiantian,Zhang Hui. Method for Glare Measurement Based on a Digital Camera Image in Interior Lighting[J]. Laser & Optoelectronics Progress, 2019, 56(2): 022201

田会娟,洪振,郝甜甜,张辉. 基于数码相机图像的室内照明眩光测量方法研究[J]. 激光与光电子学进展, 2019, 56(2): 022201

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