Italian State Police (Polizia di Stato), Interregional Forensic Science Office (GIPS), Piazzetta Palatucci, 5 - 35123 Padova, Italy.
Forensic Sci Int. 2013 Sep 10;231(1-3):131-6. doi: 10.1016/j.forsciint.2013.04.019. Epub 2013 May 16.
A complete procedure for identifying the area of convergence of blood drops originated from a single static source is presented. Both for bloodstains lying on a horizontal and on a vertical plane a complete study is developed, based on error analysis and on an opportunely defined joint probability density for the orientation of the horizontal projections of the trajectories of the drops. The method generates a probabilistic map for the area of convergence, directly linking the angles of impact, and their uncertainties, to the projection on the ground of the point of origin. One of the objectives consists in providing a statistical definition of area of convergence, extending to this topic the mathematical accuracy of the calculation of the angle of impact in bloodstain pattern analysis (BPA).
本文提出了一种完整的方法，用于识别源自单一静止源的血滴汇聚区域。无论是在水平面上还是在垂直面上的血斑，都基于误差分析和轨迹水平投影方向的适当定义联合概率密度函数进行了全面研究。该方法生成了一个汇聚区域的概率图，直接将撞击角及其不确定性与起源点在地面上的投影相关联。目标之一是提供汇聚区域的统计定义，将血斑分析（BPA）中撞击角计算的数学精度扩展到这个主题。
