Abstract: In this paper, a monocular camera calibration method based on checkerboard template is presented. This method is using a highprecision CCD camera to take pictures of checkerboard calibration template which is placed on a twodimensional platform with handoperated rails. Its fixed values vary along the Z axis, and so the subpixel coordinates of checkerboard corner points yield. Then all the camera parameters can be obtained by adopting DLT calibration method, and finally the arbitrary checkerboard corner points will be reconstructed to test the accuracy of calibration by estimating in 3D spatial coordinate. The average error of horizontal and vertical coordinates are both ± 0.02 mm. Experimental data show that by using this method highprecision camera parameters can be obtained quickly and efficiently, which meets the requirements of threedimensional reconstruction and other visual inspection occasions.

Key words: checkerboard, monocular camera, calibration, 3D reconstruction, high precision