Camera calibration is an indispensable step to obtain 3D information from 2D images. In this paper, a new camera calibration method based on active vision system is proposed. It is proved rigorously that, by controlling the camer a platform to undergo 4 translations of which no any 3 translations are co-plan ar, the camera's intrinsic parameters and the camera's orientation matrix with respect to the platform can be calibrated linearly and simultaneously. In addition, the platform's displacement vector...