In brazing rings inspection system, there may be incomplete or overlapping rings in image acquisition sequence. The overlapping area of two images was determined by adjusting the speed of conveyor and exposure time of fixed camera. Then, LSSVM and CA was applied to detect the image edge and image registration was implemented by cross correlation method. The final image was acquired by image fusion based on fade-in-fade-out method. The experiment results indicated that this method can achieve brazing rings image mosaicing quickly and accurately.