摘要
针对Web环境下手绘草图三维建模过程采集到的草图数据量较大且存在较多冗余顶点,从而降低了三维模型的生成速率和轻量化程度的问题,给出了一种Web环境下手绘草图数据实时精简方法。首先,设计出一种弦长限值法对原始草图数据进行实时重采样;然后利用基于滑动窗口控制的长度误差限值法对重采样后的数据进行实时精简,以提高数据处理效率。实例应用结果表明:在不同的手绘条件下,该方法可以使三维模型的生成速率提高60%～90%,使模型的轻量化程度提高7%～30%。
Redundant data and the huge data volume restrict the data collecting process off reehand sketch 3 D modeling in Web environment. In this work,a real-time reduction method is established. Firstly,the limiting chord length method is designed to resample sketch data in real time. Then,the volume of the resampled data is reduced in real time by controlling the length error from the sliding window,in order to improve the efficiency of data processing. Finally,under various conditions of freehand sketch,the practical results show that this method can improve the generation efficiency for 3 D model by 60% ～ 90%,while can improve the lightweight degree of the 3 D model by 7% ～ 30%.
基金
国家重点研发计划资助项目(2016YFB1101700)
中央高校基本科研业务费专项资金资助项目(2017IVA019)
关键词
WEB环境
手绘草图
实时精简
滑动窗口
轻量化
Web environment
freehand sketch
real-time reduction
sliding window
lightweight
