To satisfy the real-time demand for the traffic parameters in the Intelligent Transportation System

it proposed a new method by combining the frame-difference method with the background-difference method for vehicle tracking with the invariance property of the background in a short time. This method was used to complete a rapid background extraction by the method of twice frame-difference

and the binary difference image was obtained by the method of background-difference. Morphology operation was introduced to handle the binary image

which can improve the recognition rate to get a relatively complete connected domain. At last

vehicles were tracked

based on the distance between the connected domain of the close frames. Experimental results show that the scheme has good real-time and accuracy performance as well as robustness to meet the demand in the Intelligent Transportation System.