Disocclusion-type aware hole filling method for view synthesis

摘要

Depth-image-based rendering is an efficient way to produce content for 3D video and free viewpoint video. However, since the background that is occluded by the foreground objects in the reference view may become visible in the synthesized view, disocclusions are produced. In this paper, a disocclusion-type aware hole filling method is proposed for disocclusion handling. Disocclusions are divided into two types based on the depth value of their boundary pixels: foreground-background (FG-BG) disocclusion and background-background (BG-BG) disocclusion. For FG-BG disocclusion, the depth values of the associated pixels are optimized in the reference image to ensure the removal of ghosts and adaptively divide the disocclusion into some small holes. For BG-BG disocclusion, a foreground removal method is applied to remove the corresponding foreground objects. The removed regions are filled with the surrounding background textures so that the BG-BG disocclusion in the synthesized image can be eliminated. Experimental results indicate that the proposed method outperforms the other methods in the objective and subjective evaluations.