摘要
利用五轴三维光栅投影法获取实验性咬痕与待比对牙列的表面点云数据,完成模型三维重建并通过坐标转换建立模拟咬痕。在咬痕和待比对牙列上分别设定标志点后,进行各参数计算,通过运用有关测量学原理计算各个特征量极限误差,确定各个特征量权重值,并进行统计检验,最终得到同一认定结果;经反复检验证明其有效、准确。
Bite-mark analysis is important to forensic identity. The purpose of this study is to provide a worka- ble solution for 3D bite-mark analysis according to measurement principles. Firstly, it＇ s to obtain the 3D coordinate of the experimental bite-mark and dentitions with a high-precision optical scanning system, to rebuild the 3D model with the reverse engineering software, to take the marked points, and to set up the simulative bite-mark model by coordinate transformation. Secondly various parameters are calculated. Lastly, it＇ s to calculate the error limit and to ascertain that the weight of the various parameters and the final results of the identification are obtained by three statistical tests. After repeated testing, the solution is proved effective and accurate.
出处
《大地测量与地球动力学》
CSCD
北大核心
2010年第1期69-73,76,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(30600720)
上海市启明星计划(07QA14057)
关键词
咬痕
三维分析
测量原理
同一认定
坐标转换
bite-mark
3 D analysis
measurement principles
identification
coordinate transformation
