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Rate-distortion optimization (RDO) is widely employed to maximize coding efficiency in hybrid video coding. Due to an extensive use of spatial-temporal predictions in video coding, a global RDO problem becomes so complex that the processing of each coding unit (e.g. a macro block) is dependent and entangled each other. Usually the RDO is simply performed for each coding unit individually and independently,...
For future applications like 3DTV and free view point TV, the video data format is likely to comprise of multiple views plus pre-estimated geometric information such as a depth map corresponding to each view. By using multi-view video plus depth (MVD), it is possible to efficiently render virtual views in decoder site. However, the error and packet loss during the transmission will result in the distortion...
Face regions are visual focuses in conversational video communications, thus better reconstruction quality of the regions of interest (ROI) is highly desired or necessary in the bandwidth-constrained conversational video coding. In this paper, we introduce an efficient motion based face detection method to identify face blocks in the first step, which can reduce computational complexity substantially...
An efficient 3D face reconstruction method for any single 2D facial image even partially damaged or hidden is proposed in this paper. Our purpose is to overcome the shortcomings of traditional methods such as providing at least couple of orthogonal facial images, needing complicated calculations, and so on. Especially, most of the existing methods can't be used in real-time communication and mobile...
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