| 基于权因子调整的NURBS曲线形状修改算法及其在人脸建模中的应用 |
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| 引用本文： | 郭镔,周登文. 基于权因子调整的NURBS曲线形状修改算法及其在人脸建模中的应用[J]. 计算机研究与发展, 2004, 41(1): 142-147 |
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| 作者姓名： | 郭镔 周登文 |
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| 作者单位： | 清华大学计算机科学与技术系,北京,100084;华北电力大学计算机科学系,北京,102206 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目 ( 2 0 0 2 0 0 0 3 0 5 1) |
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| 摘 要： | 提出了一种修改NURBS曲线形状的新算法．该算法运用约束优化方法，通过调整原始曲线的多个控制顶点的权因子，使得修改后的曲线更加自然地通过给定的目标点，推导出了用于计算新权因子的3变量线性方程组，并在此基础上，针对人脸建模中的具体问题，设计了一种基于NURBS曲线形状调整的人脸轮廓线编辑算法，实验结果表明了该算法的有效性。
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| 关 键 词： | NURBS曲线 权因子 形状修改 约束优化 人脸建模 |
Weight-Based Shape Modification of NURBS Curve and Its Application in Face Modeling |
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| GUO Bin and ZHOU Deng-Wen. Weight-Based Shape Modification of NURBS Curve and Its Application in Face Modeling[J]. Journal of Computer Research and Development, 2004, 41(1): 142-147 |
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| Authors: | GUO Bin and ZHOU Deng-Wen |
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| Affiliation: | GUO Bin 1 and ZHOU Deng-Wen 2 1 |
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| Abstract: | A new method for shape modification of NURBS curves is presented. By using the constrained optimization method, the weights of original curve are changed such that the modified curve passes through a given target point more naturally. A linear equation system with only 3 variables is derived to compute the new weights. Based on the proposed method, an algorithm for contour edition of a 3D face model is also presented considering the specific problem in face modeling. Experimental results demonstrate the effectiveness of the algorithm. |
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| Keywords: | NURBS curves weights shape modification constrained optimization face modeling |
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