Approximate Multidegree Reduction of -Bézier Curves

Approximate Multidegree Reduction of -Bézier Curves
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-Bézier 曲线的近似多次约简

DOI:
10.1155/2016/8140427
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发表时间:
2016-05
影响因子:
--
通讯作者:
Zhang, Suxia
Zhang, Suxia
中科院分区:
工程技术4区
文献类型:
--
作者:
Hu, Gang;Ji, Xiaomin;Qin, Xinqiang;Zhang, Suxia

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相似文献

相应的-Bezier曲线除了继承了经典次数Bezier曲线的性质外,还具有通过改变形状控制参数来调整其形状的良好性能。在本文中,我们推导了一种在-范数下多次简化-Bezier 曲线的近似算法。通过分析-Bezier次数曲线的性质,提出了一种用-Bezier次数曲线逼近-Bezier次数曲线的方法。然后,在无限制 和 约束条件下,通过求解线性方程组可以得到逼近-Bezier曲线的新控制点,从而使逼近曲线与原曲线之间的最小二乘误差最小化。最后,给出了几个度数约简的数值例子,并计算了三种情况下的误差。结果表明该方法有效且易于实现。
Besides inheriting the properties of classical Bezier curves of degree , the corresponding -Bezier curves have a good performance in adjusting their shapes by changing shape control parameter. In this paper, we derive an approximation algorithm for multidegree reduction of -Bezier curves in the -norm. By analysing the properties of -Bezier curves of degree , a method which can deal with approximating -Bezier curve of degree by -Bezier curve of degree is presented. Then, in unrestricted and , constraint conditions, the new control points of approximating -Bezier curve can be obtained by solving linear equations, which can minimize the least square error between the approximating curves and the original ones. Finally, several numerical examples of degree reduction are given and the errors are computed in three conditions. The results indicate that the proposed method is effective and easy to implement.
DOI: 10.1016/s0167-8396(02)00093-6
发表时间: 2002-06
期刊: Comput. Aided Geom. Des.
影响因子: --
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