TY - JOUR
AU - Han, Xiaokun
AB - In a dark channel of more than 15 m, a standard A light source was used to simulate a motor vehicle's headlight, and a Nikon D750 digital camera was used as a light receiver. While the observation angle α was 0.33°, the entrance angle component β1 was −4°, the entrance angle component β2 was 0°, and the coefficients of retroreflection of the retroreflectors were measured. The entrance angle component β1 changed from −4° to 0°, and the chromaticity coordinates of retroreflectors were then measured. Experimental results show that the maximum measurement error of the coefficient of retroreflection is −2.09%, and the measured results of the chromaticity coordinates meet the national standard of retroreflective sheeting for traffic control. Obviously, the RAW data output from the camera has a linear association with the luminous flux on the surface of retroreflectors, which can be used to calculate the coefficients of retroreflection and the chromaticity coordinates.
TI - Investigation of retroreflector characteristics using computer-vision method
JO - Proceedings of SPIE
DO - 10.1117/12.2574770
DA - 2020-06-15
UR - https://www.deepdyve.com/lp/spie/investigation-of-retroreflector-characteristics-using-computer-vision-r0dMYQvdHb
SP - 115230A
EP - 115230A-3
VL - 11523
IS - 
DP - DeepDyve
ER -