According to the image characteristics in weld seam tracking based on laser vision,Radon transform is used at first to find the location of laser stripe;then,the transformed image is processed by using the method that the information coming from laser stripe is kept and other information coming from noises is removed.After that the inverse Radon transform is carried out to recover the original image.Finally,OTSU method is used for image segmentation so that the groove region can be recognized.These methods have the merits of good effects,less time cost,and the strong anti-disturbance performance,therefore they are suitable for seam tracking based on laser vision.