Vehicle-mounted camera automatic matching and calibrating method

The invention provides a vehicle-mounted camera automatic matching and calibrating method, which comprises the steps of establishing a world coordinate system, a camera coordinate system and an image coordinate system; determining position coordinates of each positioning identification point in the world coordinate system; installing a standard camera in a tail end area of a vehicle, intercepting image signals of the standard camera by using a calibration and correction controller, and finding a point, which corresponds to the identification point coordinates in the world coordinate system, in the image coordinate system; taking image signals comprising three optical positioning identification points behind the vehicle by the vehicle-mounted camera to be calibrated; extracting coordinate points, which correspond to the three optical positioning identification points, in the image coordinate system to act as test points; and acquiring deviation values of the test points relative to standard point coordinates in the horizontal and vertical directions so as to acquire correction parameters, and adjusting the vehicle-mounted camera to be calibrated according to the correction parameters so as to enable the view field center and the pitch angle of the vehicle-mounted camera to keep consistent with that of the standard camera. According to the vehicle-mounted camera matched and calibrated by the method provided by the invention, a horizontal view angle center of images behind the vehicle is always located at the center of an automatically displayed image, thereby achieving consistence between the view field center and a vehicle axis.