基于二阶差商波动最小的坏点挑选及曲线光顺算法注意:本论文已在《中国图象图形学报》2007,12(12)2184-2188发表 摘要:针对2维数据坏点挑选问题,以节点二阶中心差商的波动最小为基础,首先构造了表征节点Pi 在提高样条曲线光顺度方面潜力大小的函数,然后给出了一种基于结点差商波动最小的坏点挑选算法。并将该算法利用一些实例与曲率极值法进行了对比分析,结果表明,该算法能有效标出坏点位置。另外,基于节点二阶中心差商波动最小的原则,还给出了一种通过将节点在允许范围内进行适当调整,以减小样条曲线二阶导函数波动的光顺处理算法。实例验证结果表明,此样条曲线光顺处理算法能够有效地控制三次样条曲线二阶导函数的波动,即能提高曲线的光顺程度。 Bad Data Selecting and Curve Smoothing Arithmetic Based on Minimizing the Undula tion of the Divided DifferenceGAO Xuefeng1) , TIAN Zhongxu2) , ZHU Weibo1)
1) ( School ofMachine Electric Engineering and Autom ation Shanghai University, Shanghai 200072) 2) ( Internal Com bustion Engine Institute Shanghai J iaotong University, Shanghai 200030) Abstract:As to the selection of the 2D bad data, this paper used the method ofminimizing the undulation of the divided
difference of 2D data and p resented an algorithm that begins with constructing a function that can compute each knot’s
potential on imp roving sp line curve’s smoothness. After analyzing some examp les that using the extreme curvature2value
method and the method stated p reviously, it indicated that the algorithm this paper put forwardsmarked the positions of the
bad data efficiently. Based on the method ofminimizing the undulation of the divided difference of 2D data, this paper also
gave a smoothing treatment for cubic sp line curve to app rop riately relocate the positions of the knots in the permissive
scope. The numerical examp le at the last section demonstrated that this algorithm can effectively control the undulation of 1、浏览PDF格式全文需要使用软件--Abode Acrobat(由于软件较大并常见,我站不提供下载) 2、下载论文全文请点击鼠标右键“另存为”或使用断点续传软件下载(348KB) 本站收录的本文作者的其他论文: |
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