Method for measuring speed through vehicle road traffic videos based on image perspective projection transformation

The invention discloses a method for measuring speed through vehicle road traffic videos based on image perspective projection transformation in the technical field of digital image processing. The method for measuring speed through road traffic videos is applied to the traditional road traffic video surveillance system, and solves the problems that the measurement accuracy is low, the real-time property is poor, the measurement method is complicated, the hardware configuration cost is high, and the like in the traditional speed measuring method. According to the method disclosed by the invention, the actual motion tracks of vehicles are obtained by utilizing the perspective projection imaging principle through necessary technologies, such as camera distortion calibration, perspective projection plane transformation, projection feature identification and tracking of vehicles, and the like, and the moving speed and the traveling direction of the vehicles are measured simultaneously. The speed measuring method based on image perspective projection transformation has the advantages of easiness in extraction of the shape features of vehicles, high robustness, no additional device and pre-calibration, high responding speed, high accuracy, low cost and easiness in realization and is applicable to various traditional road monitoring systems.