Abstract: The Weighted guided image filter (WGIF) avoids halo artifacts, which is drawback of Guided image filter (GIF) at a cost of increment on running times. In this paper, a speedup method is included, which can speed up WGIF from O (N) time to O (N/s2). It can applicable in all applications in which WGIF can be used. Experimental results show that it can produce images with better visual quality comparable to WGIF and we can also observe the decrement on running times.
Keywords: WGIF, GIF, halo artifacts, run time.