Abstract

Fish-eye camera has been widely used in computer vision, mobile robots, photogrammetry and other fields for its wide-angle imaging. Fish-eye camera should be calibrated before being used, and in this paper, we first introduce several projection models for wide angle cameras, and choose the most commonly used equidistant projection, combined with the lens distortion model, to establish a calibration model for fish-eye camera. Then, by the linearization of the model, the least square solution of both the calibration parameters and the exterior orientation elements is given. Finally, through the experiment, it is concluded that the fish-eye camera calibration model can reach the ideal calibration precision with 0.3 pixels.

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