| 摘要 |
An apparatus and method of measuring the retroreflection of a road sign comprising: illuminating a road sign by an infra-red light source and by a visible light source; capturing an image incorporating the road sign by each of a plurality of cameras; isolating the image of the road sign from each of the captured images; processing the isolated images to obtain a plurality of retroreflection parameters; and calculating the retroreflection of the road sign based on the retroreflection parameters. |
