Laser & Optoelectronics Progress, Volume. 56, Issue 2, 022201(2019)

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

Huijuan Tian1,2、*, Zhen Hong2,3, Tiantian Hao2,3, and Hui Zhang1,2
Author Affiliations
  • 1 Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, School of Electrical Engineering & Automation, Tianjin Polytechnic University, Tianjin 300387, China;
  • 2 Engineering Research Center of the Ministry of Education on High Power Solid State Lighting Application System, Tianjin 300387, China
  • 3 School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
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    Figures & Tables(12)
    Position index coordinate system with the observer position as the origin
    Pixel extraction spatial coordinate system
    Position index coordinate system with the observer position as the origin
    Characteristic curve of photosensitive material
    Experiment setup for luminance calibration
    Serial number of the six sources
    UGR glare test software interface and the calculation results from image information extraction
    Relationship between image grey-scale and logarithm of exposure
    Measured data and fitted luminance function
    • Table 1. Contrast relationship between the measured and calculated values of position index

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      Table 1. Contrast relationship between the measured and calculated values of position index

      Serial number oflighting sources123456
      Measuredposition index1.3121.3051.4181.4061.6241.592
      Calculatedposition index1.2971.3111.3961.4241.6551.617
      Relative errorδ /%1.1430.4601.5511.2801.9091.570
    • Table 2. Contrast relationship between the measured and calculated values of solid angle

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      Table 2. Contrast relationship between the measured and calculated values of solid angle

      Serial number oflighting sources123456
      Measured solidangle /(10-3 sr)0.3340.3240.6080.5831.2711.189
      Calculated solidangle /(10-3 sr)0.3300.3380.6160.6121.3631.269
      Relative errorδ /%1.1984.3211.3164.9747.2386.728
    • Table 3. Comparison between the calculated and measured values of the luminance

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      Table 3. Comparison between the calculated and measured values of the luminance

      Serial number of lighting sources123456
      Measured luminance /( cd·m-2 )818.021717.1321108.101800.7321051.7021074.403
      Calculated luminance /( cd·m-2 )836.734756.2481082.397824.6721081.1631051.385
      Relative error δ /%2.2885.4552.3202.9902.8012.142
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    Huijuan Tian, Zhen Hong, Tiantian Hao, Hui Zhang. Method for Glare Measurement Based on a Digital Camera Image in Interior Lighting[J]. Laser & Optoelectronics Progress, 2019, 56(2): 022201

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Jun. 28, 2018

    Accepted: Aug. 2, 2018

    Published Online: Aug. 1, 2019

    The Author Email: Tian Huijuan (tianhjgx@126.com)

    DOI:10.3788/LOP56.022201

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