CCD CAMERA CALIBRATION BASED ON NATURAL LANDMARKS

In some hazardous environments, such as in the space environment where there is diffuse reflection, it is difficult for us to establish arti ficial landmarks. So in this paper, a new camera calibration approach using natural landmarks is presented. The proposed scheme consists of two parts. In the first part, three couples of parallel straight lines are used to determine the rotation parameters and the internal parame ters of the camera. In the second part, the coordinates of a distinct feature point mapped from 3-D to 2-D, together with the length of a li ne segment, are used to determine the translation parameters of the ca mera. The feasibility of the approach is demonstrated by two experimen ts performed on a conceived and a real image. The results show that th e new approach can reach the same precision as Tsai and DLT. (C) 1998 Pattern Recognition Society. Published by Elsevier Science Ltd. All ri ghts reserved.