Abstract: A new algorithm of welding seam track recognition based on welding seam CCD image pattern feature is presented for automatic welding seam tracking. The principle of the new algorithm is to divide welding seam into many sections, each of which is descripted with feature vector, to recognize next feature vector by former feature vector and to recognize the welding seam. The new method has advantage of fast speed, exact tracking and adaptive local and whole noise. It can be used on the trajectory preplan of robotic are welding seam and seam real-time tracking.

Key words: Image processing, Pattern recognization, Preplan, Robot arc welding, Welding seam tracking