Aiming at the problem of missing corner coordinate dimension in traditional camera calibration method

a camera calibration method based on three-dimensional（3 D） calibration plate is proposed.Based on the algorithm of plane calibration

the three-dimensional coordinates of the corner points are used to calculate the internal parameter of the camera.According to the correspondence between the world coordinates and pixel coordinates of the calibration plate corner points and the singular value decomposition（SVD） method

the projection transformation matrix of the camera is solved

and the initial value of the camera internal parameters is calculated by the properties of the rotation vector.Finally

the nonlinear optimization method is applied to optimize all the calibration parameters.The experimental results show that the stability of the 3 D camera calibration method is better than the plane calibration

and the calibration parameters are more in line with the pinhole camera model.