Abstract:This paper presented an external parameter calibration method for multiple cameras with non-overlapping fields of view (FOVs) based on a laser ray reflected from a half of the mirror. This method is especially suitable for the condition that the laser beam cannot go through the FOV of both cameras. Firstly, the internal parameter calibration of single camera is completed. Spot laser projects laser beam into the FOVs of the first camera, and then across the FOV of the second camera by part mirror calibration panel reflection. The rotation matrix and the translation vector between the two cameras are computed by the reflecting co-linearity property of the laser beam. The proposed method does not require any complex equipment, but one spot laser and one planar target with part mirror area. Experiment results show that when the working distance of the cameras is about 500mm-1200mm and field-of-view is around 500mm*400mm, the camera calibration max error is about 0.36mm. Compared with the present approaches, the proposed method has the advantages of simple equipment, easy to operation, easy to calculation.
