Many mesh streaming algorithms have focused on the transmission order of the polygon data with respect to the current viewpoint. In contrast to the conventional progressive streaming where the resolution of a model ch...
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ISBN:
(纸本)9781595938633
Many mesh streaming algorithms have focused on the transmission order of the polygon data with respect to the current viewpoint. In contrast to the conventional progressive streaming where the resolution of a model changes in the geometry space, we present an new approach which firstly partitions a mesh into several patches, then converts these patch into multi-chart geometry images(MCGIM). After all the MCGIM and normal map atlas are obtained by regular re-sampling, we could construct the regular quadtree-based hierarchical representation based on MCGIM. Experimental results have shown the effectiveness of our approach where one server streams the MCGIM texture atlas to the clients.
The recent popularity of networked graphics applications such as distributed military simulators and online games, has increased the need to transmit large 3D meshes and textures over wireless networks. To speed up la...
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ISBN:
(纸本)9781424446445
The recent popularity of networked graphics applications such as distributed military simulators and online games, has increased the need to transmit large 3D meshes and textures over wireless networks. To speed up large mesh transmission over low-bandwidth wireless links, we use a wavelet-based technique that aggressively compresses large meshes and enables progressive (piece-wise) transmission. Using wavelets, a server only needs to send the full connectivity information of a small base mesh along with wavelet coefficients that refine it, saving memory and bandwidth. To mitigate packet losses caused by high wireless error rates, we propose a novel Forward Error Correction (FEC) scheme based on Unequal Error Protection (UEP). UEP adds more error correction bits to regions of the mesh that have more details. Our work uses UEP to make wavelet-encoded meshes more resilient to wireless errors. Experimental results shows that our proposed UEP scheme is more error-resilient than No Error Protection (NEP) and Equal Error Protection (EEP) as the packet loss rate increases by achieving 50% less relative errors and maintaining the decoded mesh structure. Our scheme can be integrated into future mobile devices and shall be useful in application areas such as military simulators on mobile devices.
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