基于特征曲线和曲面匹配的弹痕自动比对方案  

The Auto Bullet Mask Matching Program Based on Surface Extracting And Surface Matching

作　　者：温惠[1] 刘腾[1] 翁海霞[1] 

机构地区：[1]山东大学电气工程学院

出　　处：《数学的实践与认识》2010年第15期130-138,共9页Mathematics in Practice and Theory

摘　　要：提出了消除测量误差的两套方案：基于特征曲线提取的方案和基于曲面匹配的方案．建立了中心重合法、近似法矢重合法与多点预定位法相结合的曲面匹配模型；讨论并给出了用于弹痕比对的六个差异度衡量指标；建立了弹痕及弹头相似度模型；给出了方案的有效性评价体系；最后，对一组实际的弹痕数据，进行有效性验证，取得了较高的正确率．This paper proposes two programs for the elimination of measurement error, one is based on surface extracting and the other is based on surface matching. In the paper, a surface matching model is built through the combination of three methods-the matching of centers pointsl the matching of normal vectors and a pre-position method, then six difference degrees measurements of the bullet mask have been given. What＇s more, one comprehensive model of bullets similarity is built to give the whole program an effective analysis. In the end, for a set of actual bullet data, a high accuracy rate is obtained through the effectiveness verification.

关 键 词：形状特征曲线 曲面匹配 多点预定位 相似度 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]