Traffic signal light detection through sunglare filters of different Q factors
✍ Scribed by David A. Palmer; John Mellerio; Amanda Cutler
- Book ID
- 101298134
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 137 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0361-2317
No coin nor oath required. For personal study only.
✦ Synopsis
Recent guides for use of sunglare protection filters have introduced the concept of Q factors as a mea-
r sure of colour appearance distortion in viewing traffic signal lights. The adoption of Q factor values was apparently arbitrary and not firmly based on experimental data. The manner in which changes in Q factor affect colour perception and detection of signal lights has been mea-͐ 780 380 V (l)rf D (l)rdl ͐ 780 380 t F (l)rV (l)rf D (l)rdl
, (1) sured and shows that detection thresholds vary with the Q factor in a manner that can only partly be explained, but that is not independent of the colour of the signal as where t F (l) is the spectral transmittance of the sunglare assumed in the guides.