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
- Laser & Optoelectronics Progress
- Vol. 56, Issue 2, 022201 (2019)
Fig. 1. Position index coordinate system with the observer position as the origin
Fig. 2. Pixel extraction spatial coordinate system
Fig. 3. Position index coordinate system with the observer position as the origin
Fig. 4. Characteristic curve of photosensitive material
Fig. 5. Experiment setup for luminance calibration
Fig. 6. Serial number of the six sources
Fig. 7. UGR glare test software interface and the calculation results from image information extraction
Fig. 8. Relationship between image grey-scale and logarithm of exposure
Fig. 9. Measured data and fitted luminance function
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Table 1. Contrast relationship between the measured and calculated values of position index
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Table 2. Contrast relationship between the measured and calculated values of solid angle
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Table 3. Comparison between the calculated and measured values of the luminance
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