| 摘要 |
This invention aims at providing an traffic flow measurement method and apparatus attaining the stable measurement without being affected by the change in the brightness of the external environment such as daytime vehicle front, et al. In order to achive the above object, the traffic flow measurement apparatus for practicing the traffic flow measurement method comprises image input unit for receiving image information derived from the ITV camera, detection unit for detecting sampling points which are candidates for a vehicle fronts in a mesurement area, and measurement processing unit for determining a position of the vehicle front in the measurement area from the candidate points detected by the detection unit. The measurement processing unit calculates a vehicle velocity based on a change between a position of the vehicle front derived from past image information and a current position of the vehicle front. |
