| 摘要 |
A video imaging system for monitoring the flow of traffic through an area (12) includes a video camera (10) located above the area (12) and looking down upon the area (12), one or more infrared light sources (14) being positioned to illuminate at least a portion of the area (12) or objects (16) moving through the area (12) with infrared light, the video camera (10) being sensitive to light in the infrared region. Preferably, the infrared light sources (14) are positioned so that an object (16) moving through the area (12) will not cast shadows or will cast shadows in a predictable manner, so that suitable compensation can be made. |
