【摘要】 为克服无线网络的窄带宽和移动计算终端固有的功耗较低与资源有限等缺陷,提出了一种无线网络环境下基于视觉优化的多分辨率三维模型传输与实时绘制方法。首先,基于改进显著性区域计算模型提出一种视觉优化的模型简化算法,使视觉重要顶点在简化过程中尽可能地得到保留。在该计算模型中,提出了一种三维本地窗口计算方法和加权融合技术以获得有效样本顶点,提高了显著性区域判定的准确性。其次,提出一种无线网络中模型实时绘制方法,通过有效的模型编码和计算任务分配,使渐进模型数据能够快速传输到移动客户端,并在仅进行基本绘制计算的同时摒弃耗费资源的本地重构计算。最后,分别在模拟环境和在802.11b标准的无线局域网络环境中进行了算法性能测试。实验结果表明,采用本算法能够在获得较好的模型视觉简化效果的同时实现模型的任意分辨率的实时绘制。更多还原

【Abstract】 In order to overcome the shortcomings brought by the narrow bandwidth of wireless network,low power consumption and limited resources for mobile computing terminals,a perceptually optimized model transmission and real-time rendering method was propsed.Firstly,a perceptually optimized model simplified algorithm based on the proposed improved salient region measuring model was presented for preserving the visually important vertices as longer as possible.Then,an effective real-time rendering method was developed.With the help of the smart model coding and computing task assigning,the progressive model can be delivered from the server to a mobile terminal quickly and rendered real-time without any redundant local reconstruction computation.The experimental results both on HP210 Pocket PC PDA among real 802.11b wireless network and NS2 simulation environment have shown that the proposed method can achieve visually appealing simplified result and gain real-time interactive rendering for multi-resolution model among wireless network.更多还原