Abstract:A fisheye image correction method for laser target shooting training system is discussed in the paper. Because each ring in target image has the same width, the mapping relationship of the undistorted distance and the distance between optical center of lens and each point in the image is approximated by least square method. Fisheye image correction and scoring method are implemented when center of blank is located at optical center. In case of none overlapping, center of blank and optical center are connected with a straight line. The distance between optical center and intersection points of the straight line and each ring are measured, and the mapping relationship is approximated. Experimental results show that the proposed method provides satisfactory accuracy for shooting scores.