Parameter-Free Inter-view Depth Propagation for Mobile Free-View Video

摘要

As a result of the rapidly improving performance of mobile devices, there is an inevitable trend for the development of applications with stereoscopic functions. For these applications, especially those can be seen from free angles, a set of depth images are usually needed. To fit for bit-rate limited working conditions such as for mobile terminals, depth propagation is always exploited thus to decrease the transfer consumption. Traditionally, accurate propagation needs camera parameters to warp one view to another, which are usually unavailable. This paper proposes a parameter-free depth inter-view propagation method for free-view video with multi-view texture videos plus single-view depth video. Firstly, the depth is estimated for each view by the corresponding texture video. Then, inter-view relationships of depth views are investigated by the neighboring estimated depths. Finally, the obtained interview relationship is used to propagate the depth from one given depth with high quality to other views. Experimental results demonstrate that our scheme has better quality on both depth and virtual viewpoint generation.