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基于NURBS曲线拟合的shx字体优化

发表时间:2011-02-28  浏览量:1712  下载量:778
全部作者: 梅仕伟,黎水平
作者单位: 武汉理工大学机电工程学院
摘 要: 从数控雕刻加工特点出发,针对shx矢量汉字字体在数控雕刻中出现的问题,提出用非均匀有理B样条(nonuniform rational B-spline,NURBS)曲线优化拟合矢量汉字的方法。在拟合过程中,首先对型值点的选取进行初步探讨,然后对NURBS曲线在反求过程中出现的首末数据点振荡失真问题,结合矢量汉字自身特点,提出增加虚型值点的解决方法。最后给出shx字体优化拟合程序流程图,并对shx楷体汉字拟合前后进行相应比较。结果表明:拟合后的shx汉字美观性和光顺性都得到了大幅提高,非常适合于数控雕刻。
关 键 词: 机械制造自动化;数控雕刻;shx字体;非均匀有理B样条;虚型值点
Title: Optimization of shx fonts based on NURBS curve fitting
Author: MEI Shiwei, LI Shuiping
Organization: School of Mechanical and Electronic Engineering, Wuhan University of Technology
Abstract: According to features of computer numerical control (CNC) engraving and the problem of shx vector Chinese characters discovered in CNC engraving, this paper presents a method to fit and optimize the shx fonts with nonuniform rational B-spline (NURBS) curves. During the process of fitting, firstly the choice of data points has been discussed, and then it puts forward the method of virtual data pointing to avoid the first and last data points oscillated during the process of NURBS curves reversing combining with the features of vector Chinese characters. Finally, the program diagram was developed and the contrast of shx regular script before and after fitting has been provided was given. The results show that the aesthetics and smoothness of fitted shx Chinese characters are greatly improved, which is suitable for CNC engraving.
Key words: mechanical manufacturing and automation; computer numerical control engraving; shx fonts; nonuniform rational B-spline; virtual data points
发表期数: 2011年2月第4期
引用格式: 梅仕伟,黎水平. 基于NURBS曲线拟合的shx字体优化[J]. 中国科技论文在线精品论文,2011,4(4):311-315.
 
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