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Articles by Li Yao
Total Records ( 2 ) for Li Yao
  Li Yao , Dong-Xiao Li and Ming Zhang
  Dense depth maps provide significant geometry information for 3D video and free viewpoint video systems. Traditional stereo correspondence methods usually deal with each stereo image pair separately. As a result, the generated depth sequence is temporally inconsistent. This paper presented a novel approach to recover spatio-temporally consistent depth maps. The proposed method first applied sequential belief propagation algorithm to achieve an approximate minimum of spatial energy on Markov random fields. Then in temporal domain, a smoothness cost along optical flow was incorporated between consecutive frames. The combined cost which determined the disparity value was passed forward and temporal consistency was enforced during the process. In addition, the streamlined implementation was time and memory efficient. In experimental validation, quantitative evaluation as well as subject assessment was performed on several test datasets. The results showed that the proposed method yielded temporally consistent depth sequence and reduced flickering artifacts in the synthesized view while maintaining visual quality.
  Hanqian Wu , Wei Li , Chuck Winer and Li Yao
  As the next generation of networking computing, cloud computing can offer both software and hardware as on-demand resources and services over the Internet and therefore reduce the capital expenditure and operational expenditure for IT consumers. In order to realize these purposes, however, there are still some challenges to be solved. With no doubts, security is the most concerned issue. This is why security must be integrated into every aspect of cloud computing. Virtualization is the key technology to build a cloud computing platform, as a result, virtualization security is one of the significant concerns in cloud computing. In this paper, we focus on the security of virtual network in virtualized environment. First, we research Xen platform which is the most popular hypervisor used in the industry and then the security problems that exist in a virtual network are discussed and analysed based on Xen platform. Finally this paper presents a multi-layer virtual network framework aimed to control the inter-communication among virtual machines deployed in physical machines with higher security.
 
 
 
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