摘要
研究不同载体血痕干燥过程,分析血痕数字图像变化与经过时间的关系,以期为血痕经过时间推断提供一种可靠的新方法。以体视显微镜动态观察在玻璃、瓷砖、木材3种载体上0~4.00h血痕形态并拍照记录,结合图像分析系统计算纵裂数量和长度后进行统计分析。血痕干燥过程数字图像可划分一级环裂、纵裂、二级环裂、龟裂区;0~4.00h,纵裂数量、纵裂长度、纵裂长度/血痕半径3项参数指标与经过时间的二项式回归方程(P<0.001)具有高度统计学意义,血痕干燥过程中数字图像变化随时间呈一定规律性。实验所建立的3项参数指标特征可为法医学推断短期血痕经过时间提供一种全新且客观的无损检验方法和参考依据。
This study aims to find a new method for age estimation of bloodstains by investigating the image changes of drying bloodstains.Each group of samples that volume about 50mL on the glass,ceramic tile and wood were prepared from healthy volunteers,then were in a closed dark environment.The morphology of bloodstains was recorded by stereomicroscope within 4.00h.Number and length of longitudinal crack was measured by Motic Images Plus 2.0 image analysis system,and the statistical analysis was performed by SPSS 20.0.The digital image of drying bloodstains was divided into first ring crack,longitudinal crack,secondary ring crack and rupture zone.There was a significant difference between each parameter(the average number,average length of longitudinal crack,average length/bloodstain radius)and time within 4 hours.The morphological characteristics of digital photography of drying bloodstains show a certain regularity with the time.And the quantitative indexes established by this experiment provide a brand-new,objective method and reference for forensic science to estimate the short time of bloodstains.
作者
郑吉龙
赵开放
腾月
刘绍松
刘夏
ZHENG Ji-long;ZHAO Kai-fang;TENG Yue;LIU Shao-song;LIU Xia(School of Forensic Science,Crimes Investigation Police University of China,Liaoning Shenyang 110035;Pudong Branch of Shanghai Public Security Bureau,Shanghai 200120;Law-Enforcement and Supervision Department of Benxi Political and Legal affairs Committee,Liaoning Benxi 117001;Qingpu Branch of Shanghai Public Security Bureau,Shanghai 201700)
出处
《中国刑警学院学报》
2020年第3期96-100,共5页
Journal of Criminal Investigation Police University of China
基金
公安部技术研究计划(编号:2016JSYJC56)
辽宁网络安全执法协同创新中心资助项目。
关键词
法医病理学
血痕经过时间
数字图像分析技术
Forensic pathology
Age of bloodstains
Digital image processing technology
