A Single-view Camera Calibration Method Using Scene Geometry

In the process of camera calibration, when the scale of the object in the image is unknown, the calibration is completed by gradually solving the camera parameters, and the 3D reconstruction experiment of the scene is realized by using the calibration results. The experiment of 3D reconstruction of the scene is realized. The basic idea is to calibrate by two mutually orthogonal four grid pattern reference objects, and use the three groups of parallel lines existing in the scene to solve the vanishing point of the corresponding direction of each group of parallel lines, and then determine the coordinate of the cardinal point according to the properties of the vanishing point. In the next step, the constraint equation system is established by the three-point collinear principle of the straight line, and the intrinsic parameters of the camera are obtained by decomposing the matrix eigenvalues. In this paper, the algorithm implementation process is designed, and a large number of simulation experiments are carried out to show that the method has high robustness. The real image experiments also show that the proposed method has high accuracy and meets the requirements of 3D reconstruction of objects in the actual environment. has a certain use value.