摘要
由于现有的图形扫描数字(矢量)化理论及方法的不足,工程曲线图的数字化处理难于应用自动矢量化方法,即使采用半自动矢量化方法也呈现出处理的低效能特点.据此提出了便于工程应用的,基于样条曲线拟合及计算机辅助技术的数字矢量化方法.即通过扫描将曲线图形载入计算机并用鼠标直接在图像上进行曲线拟合的节点择取,通过实时观察动态显示的鼠标移动点到邻近于它的前2次所取节点之间的拟合样条曲线与原图形曲线的吻合程度来保证拟合曲线节点的正确择取.它不仅快速、准确和操作方便而且同时给出了用数学公式描述的数字化结果,这给工程的广泛应用带来方便.
It is difficult to apply automatic vectorization to digitization of engineering curve image because of the shortages of existing theoretic and method. It is also of lower efficiency even if semiautomatic vectorization method is used. A digitization method based on spline curve fitting and computer aided technique is established. It is very easy to apply it, that is, a curve image is loaded to computer by scan and the fitting curve nodes are chosen directly by mouse. The fitting curve nodes can be chosen exactly by means of observing if the fitting spline curve between a mouse moving point and its front twice chosen nodes is approximately consistent with the original curve. Not only is it quick, exact, operation conveniences but mathematics expressions of the curves are given. It can be widely used to engineering.
出处
《应用基础与工程科学学报》
EI
CSCD
2008年第4期504-510,共7页
Journal of Basic Science and Engineering
关键词
图形曲线数字化
快速
准确和简便
计算机技术
数字化曲线的数学描述
image curve digitization
quick, exact and conveniences
computer aided technique
mathematics expressions of digitization curve
