关键词: 三维视频, 深度图上采样, 边界检测, 视图合成

Abstract:  In 3D video system, in order to better preserve the edge sharpness of depth maps and improve the rendering quality of virtual views, the paper proposed a novel two-step edge adaptive up-sampling scheme to recover the lost information due to down-sampling operation prior to encoding. We detected the horizontal and vertical edges of low resolution (LR) depth map and high resolution (HR) texture map by Sobel operation. Then, we utilized the texture information to direct the reconstruction of accurate HR depth map according to the characteristic of different areas of depth map. Experimental results show that the proposed method improves both depth map coding efficiency and perceptual quality of rendered views.
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Key words: D video, depth map up-sampling, edge detection, view synthesis