关键词: 深度图像后处理, 置信区间的交点, 最小均方逼近多项式技术, 加权模式滤波器

Abstract: Depth image based rendering is one of the key technologies in three-dimensional system. However, coding distortion in depth map will affect the following performance of virtual view synthesis. In this paper, a depth map post-processing method is proposed for virtual view synthesis. In the method, the filtering window size for each pixel is established based on the intersection of confidence intervals rule. The depth value for each pixel within the filtering window is estimated by using least square polynomial approximation. A weighted mode filtering is applied to the estimated depth map, and the filtered depth map is obtained. Experimental results show that, the proposed method can accurately recover the depth information from the decoded depth map, and promote the performance of virtual view synthesis.

Key words: depth map post-processing, intersection of confidence intervals, least square polynomial approximation, weighted mode filtering