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DOI:
Journal of Software:2004.15(2):300-307

曲线描述的一种方法:夹角链码
赵宇,陈雁秋
(复旦大学,计算机科学与工程系,上海,200433)
Included Angle Chain:A Method for Curve Representation
ZHAO Yu,CHEN Yan-Qiu
()
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Received:December 19, 2002    Revised:March 05, 2003
> 中文摘要: 提出了一种有效的曲线编码和描述方法--夹角链码.夹角链码的思想框架是:首先将曲线用一串有方向的等长度的线段来表述,根据相邻线段之间的夹角差形成一串角度序列,即夹角链码来描述这条曲线.描述曲线的直线段的数目由面积法则来决定,并且待处理的曲线将被分割成相等数目的线段.该方法最大的一个优点是曲线的描述具有平移、拉伸和旋转的不变性.该方法的一个实际应用在于,将某一个地区的合成孔径雷达(synthetic aperture Radar,简称SAR)图像与地图相匹配.
Abstract:A novel approach, Included Angle Chain, is presented for curve representation and encoding. In this framework, a curve is modeled by a number of linked equi-length line segments and a sequence of codes using the included angles between a pair of neighboring line segments is used for representing the curve. The number of the segments is determined by an area criterion, and the curves to be matched are represented by an included angle chain of the same length. The representation is invariant to rotation, scaling, and translation. A practical use of the proposed approach is to register a SAR (synthetic aperture Radar) image of certain region with maps.
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基金项目:Supported by the National Natural Science Foundation of China under Grant No.60275010(国家自然科学基金);the National Grand Fundamental Research 973 Program of China under Grant No.2001CB309401(国家重点基础研究发展规划(973)) Supported by the National Natural Science Foundation of China under Grant No.60275010(国家自然科学基金);the National Grand Fundamental Research 973 Program of China under Grant No.2001CB309401(国家重点基础研究发展规划(973))
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赵宇,陈雁秋.曲线描述的一种方法:夹角链码.软件学报,2004,15(2):300-307

ZHAO Yu,CHEN Yan-Qiu.Included Angle Chain:A Method for Curve Representation.Journal of Software,2004,15(2):300-307