Abstract:

To solve the slowness and low integration problems of existing algorithms, based on existing technical researches, an improved algorithm is proposed. First, segment the foreground with image segmentation algorithm Grabcut. Second, generate trimap as the input of matting algorithm Shared Matting on the basis of segmentation result. Third, obtain the final matting result. For characteristics of the system, Grabcut algorithm is optimized with downsampling technology to accelerate the segmentation speed and concurrently accelerates trimap generating algorithm and Shared Matting to further improve the processing speed. It is proved by experiment that the system has a strong applicability and can produce an ideal matting effect with less interaction in a short time.

Key words: fast matting, image segmentation, trimap generation