A new method for camera calibration based on concentric circles with cross lines

By studying traditional methods for camera calibration, a new method based on concentric circles with cross lines is proposed. Camera calibration is completed by taking pictures from two or more different locations and acquiring the images with calibration characteristic. Different from the traditional method of extracting reference points, the new method based on curve fitting can get precise coordinates of reference points, which assures the accuracy of the results of camera calibartion. Meanwhile this method owns the characteristics of simplicity in theory, ease in implementation and good maneuverability. Experimental results show that the method can obtain high accuracy, low margin of error and better effect of calibration.