Wavelet-Based Data Reduction of B-Spline Curves  

作　　者：ZHAO Gang MU Guo-wang WANG Su 

机构地区：[1]School of Mechanical Engineering and Automation, Beijing University of Aeronautics ＆ Astronautics, Beijing 100083, China [2]Hebei University of Technology, Tianjing 300401, China

出　　处：《Computer Aided Drafting,Design and Manufacturing》2006年第2期12-17,共6页计算机辅助绘图设计与制造（英文版）

基　　金：Supported by the Natural Science Foundation of China (50075032) and State High-Technology Development Program of China (2001AA421150)

摘　　要：A strategy for B-spline curve data reduction based on non-uniform B-spline wavelet decomposition is presented. In existing methods of knot removal, ranking the removal knots depends on a procedure of assigning a weight to each knot to indicate its significance. This is reasonable but not straightforward. Propose is a more straightforward and accurate method to calculate the weight. The wavelet coefficient is taken as a weight for the corresponding knot. The approximating curve and the error can be obtained directly from the wavelet decomposition. By using the hierarchical structure of the wavelet, the error can be computed efficiently in an accumulative manner.

关 键 词：data reduction B-spiine curves WAVELETS knot remove 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]