Abstract: The End Life of Vechiles (ELV) was needed to be located before using the windshield automatic cutting machine to cut off the windshield.To give a brief review of various methods of aligning and point out the application limitation in ELV automatically aligning.Based upon the introductions,a new method was proposed,utilizing computer vision technology by setting up a specific plane with calibration paper on the top of ELV.Taking the pictures of the plane and calibration paper with a single camera,and getting the pixel coordinates of specific points,then obtained the world coordinate according to the calibration formula.Computing offset distance and rotation angle of ELV by comparing the world coordinate of specific points with standard.Experiment results indicated that the method was of high efficiency,and had value of popularization and application.

Key words: ELV, windshield, automatically aligning, computer vision