摘要
针对产品协同设计过程中面临的三维CAD产品模型传输困难问题,提出一种基于最佳线性预测的自由曲线曲面的有损压缩算法。该算法采用最佳线性预测策略,并根据最小均方差准则对自由曲线曲面的控制点列进行预测,同时按用户给定精度进行量化处理,随后对量化值进行熵编码,从而实现自由曲线曲面的有损压缩。实验表明本文算法有较好的压缩效果。
A loss compression algorithm about free-foim curve and surface in CAD models is proposed to effectively exchange and transmit the model data in collaborative design environment. In this algorithm, the scheme uses a optimal linear predictor to predict the coordinates of the control points in free-form curve or surface according to the theory of Minimum Mean Square Error, coupled with a scalar quantizer which precision appointed by user, follow by bit-plane arithmetic entropy coder. According to the experients, the algorithm presented here is effective for geometry compression.
出处
《微计算机信息》
北大核心
2007年第28期158-160,共3页
Control & Automation
基金
国家自然科学基金(50375058)
关键词
自由曲线曲面
有损压缩
最佳线性预测器
量化
free form curve and surface
loss compression
optimal linear predictor
quantize