Method for detecting vehicle in urban traffic scene based on vehicle symmetry feature

The invention discloses a method for detecting a vehicle in an urban traffic scene based on the vehicle symmetry feature. An urban traffic scene image is acquired and a vehicle contour feature in the image is acquired; a vehicle region in the urban traffic scene image is detected through a vehicle contour vertical symmetry axis and a horizontal symmetry axis and a vertical symmetry axis of a vehicle license plate, a leading-edge basis is laid for urban traffic scene understanding and vehicle monitoring analysis, and the method has great significance in improving vehicle driving safety and issuing traffic flow information in real time to induce traffic.