摘要
给出如何将被识别为二次曲线的在线手绘图按照识别类型进行参数特征提取,并提出对被识别为圆(弧)、抛物线的在线手绘二次曲线进行参数特征修正的方法。首先,将二次曲线按中心曲线和非中心曲线两类分别对其参数特征提取方法加以介绍,然后给出圆(弧)、抛物线的参数特征的修正方法,从而为在线手绘图识别系统与CAD系统的融合提供参数接口。实验证明,该特征修正方法可以很好地对拟合结果进行修正,为从2D草图重建3D模型奠定了基础。
Freehand sketch is an efficient way for expression, communication and record of ideas at the conceptual de- sign stage of products. The paper presented a novel method for feature extraction and the correction for online freehand conic section and developed a human-computer interface prototype system (FSR) for assisting designers during concep- tual design stages,which maks system interface easy and friendly to use. Firstly, this paper classified the conic section to central curve and non-central curve and correspondingly introduced its parameter feature extraction method. Secondly, the paper proposed the parameter characteristic correction method of the circle (arc), the parabola. Consequently, it pro- vided the parameter interface for CAD system that sustains the ordine freehand sketching. The system was tested with a number of sketched inputs of 2D geometry. The effectiveness of the algorithm was demonstrated preliminarily by exper- iments. This feature extraction and the revision method may carry on the classification well to the recognition result of online freehand sketch.
出处
《计算机科学》
CSCD
北大核心
2014年第1期297-299,共3页
Computer Science
基金
国家自然科学基金(51105310)资助
关键词
在线手绘图
识别
二次曲线
参数特征提取
参数特征修正
Online freehand sketch, Recognition, Conic section,Feature parameter extraction, Feature parameter correc- tion
作者简介
王关峰(1978-),男,工程师,主要研究方向为计算机辅助设计,E-mail:wangguallfenga@nwpu.edu.cn;
王淑侠(1978-),女,博士,副教授,主要研究方向为计算机视觉、在线手绘图识别、计算机辅助设计;
余隋怀(1962-),男,教授,主要研究方向为计算机辅助概念设计、人机交互技术;
商满屯(1962-),男,教授,主要研究方向为计算机图形图像处理、计算机视觉。