Approximating uniform rational B-spline curves by polynomial B-spline curves
Approximating uniform rational B-spline curves by polynomial B-spline curves
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用多项式 B 样条曲线逼近均匀有理 B 样条曲线
DOI:
10.1016/j.cam.2012.11.019
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发表时间:
2013-05
影响因子:
2.4
通讯作者:
Hu Qianqian
中科院分区:
文献类型:
--
作者:
Xu Huixia;Hu Qianqian
Approximation of rational B-spline curves by B-spline curves is an important issue in computer aided geometric design. This paper presents a method to approximate a uniform rational B-spline with B-spline curve sequence as follows. We first elevate the degree of the original rational B-spline curve and take the control points of the degree-elevated curve as new control points of the B-spline approximation curve. Next we take an extended knot vector of the original curve as a new knot vector of the approximation curve. This generates a B-spline approximation curve with the same degree as the degree-elevated curve. Based on the discrete B-spline and multiple products of B-spline functions, we finally prove that the derivatives of any given degree of the uniform B-spline approximation curve sequence converge uniformly to the corresponding derivatives of the original rational B-spline curve. This approximation method is very simple and guarantees the convergence of the approximation.
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DOI:
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发表时间:
1980-10
期刊:
Computer Graphics and Image Processing
影响因子:
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作者:
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影响因子:
2.1
作者:
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DOI:
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发表时间:
2010-06
期刊:
Comput. Aided Des.
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
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期刊:
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影响因子:
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通讯作者:
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