Rapid three-dimensional calibration method for wide baselines for intelligent monitoring systems

The invention discloses a rapid three-dimensional calibration method for wide baselines for intelligent monitoring systems, the method is simple and stable, and calibration parameters of a camera can be obtained just through selecting the coordinate positions of corresponding two calibration points and the camera in a three-dimensional scene in a three-dimensional scene coordinate and an image coordinate. Certainly, the result is obtained at the cost of a certain precision reduction, because in the process of establishing an imaging model, a linear projection model is selected, and a situation that the optical center of the camera is arranged in the center of an image is hypothesized, the scale factors of pixels in the UV (ultraviolet) direction are equal, and a phenomenon of beveling distortion does not exist. In the existing production process, the distortion of an optical system of a common fixed-focus camera is small, and the small distortion is acceptable to the demands of video monitoring. A wide baseline point is calibrated by using two points with longer pixel distances in a selected scene, in such a way, the error caused by calibration point selection is reduced to some extent.