体表损伤与瘢痕的三维测量方法应用评估  

Evaluation of 3D Measuring Methods for Body Surface Damage and Scars

作　　者：王金明 米静雅 胡文虎 李正东[1,2] 邹冬华 陈忆九 WANG Jin-ming;MI Jing-ya;HU Wen-hu;LI Zheng-dong;ZOU Dong-hua;CHEN Yi-jiu(Department of Forensic Medicine,School of Basic Medical Sciences,Fudan University,Shanghai 200032,China;Shanghai Key Laboratory of Forensic Medicine,Key Laboratory of Forensic Science,Ministry of Justice,Shanghai Forensic Service Platform,Academy of Forensic Science,Shanghai 200063,China;School of Forensic Medicine,Southern Medical University,Guangzhou 510515,China)

机构地区：[1]复旦大学基础医学院法医学系,上海200032 [2]司法鉴定科学研究院上海市法医学重点实验室司法部司法鉴定重点实验室上海市司法鉴定专业技术服务平台,上海200063 [3]南方医科大学法医学院,广东广州510515

出　　处：《法医学杂志》2020年第2期204-209,215,共7页Journal of Forensic Medicine

基　　金：“十三五”国家重点研发计划资助项目(2016YFC0800702);国家自然科学基金资助项目(81571851,81701863,81722027);上海市法医学重点实验室资助项目(17DZ2273200);上海市司法鉴定专业技术服务平台资助项目(19DZ2290900);中央级科研院所公益科研专项资助项目(GY2020G-4)。

摘　　要：目的检验结构光三维扫描法和单相机摄影测量法这两种三维测量方法在法医学体表损伤与瘢痕测量中的准确性和可靠性。方法对比分析直尺法、结构光三维扫描法和单相机摄影测量法对86处尸体损伤的测量结果;对比分析结构光三维扫描法、单相机摄影测量法、Photoshop套索像素法、PDF阅读软件法对13处活体模拟块状瘢痕面积的测量结果,并记录所耗时间;以贴纸的已知规格信息作为标准值,比较直尺法、结构光三维扫描法和单相机摄影测量法的测量准确度,计算均方根误差(root mean square error,RMSE);对不同操作者和同一操作者前后3次测量结果的可重复性进行组内相关系数(intraclass correla⁃tion coefficient,ICC)一致性评价。结果两种三维测量方法与直尺法在尸体损伤上测得的结果差异无统计学意义;结构光三维扫描法、单相机摄影测量法、PDF阅读软件法的测量结果和Photoshop套索像素法相比差异无统计学意义,单相机摄影测量法后处理耗时长于其他方法;直尺法测量长距离组(10~40cm)时结果小于标准值,RMSE值结果为结构光三维扫描法<单相机摄影测量法<直尺法;组内和组间的ICC值均大于0.99。结论结构光三维扫描法和单相机摄影测量法均可应用于法医学体表损伤的记录和测量,前者在测量精度及稳定性上表现更优,后者的数据色彩还原度更好,但后处理耗时较长。Objective To assess the accuracy and reliability of the two 3D measuring methods,structured-light scanning and single-camera photogrammetry in forensic body surface damage and scar measurement.Methods The measuring results of 86 injuries by the ruler method,structured-light scanning and single-camera photogrammetry were compared and evaluated.The area measuring results of 13 simulated scars by the structured-light scanning,single-camera photogrammetry,Photoshop lasso pixel method and PDF reading software were compared and evaluated.The time consumed was recorded.The known specification information of the stickers was used as the standard value to compare the measuring accuracy of the ruler method,structural-light scanning and single-camera photogrammetry,and to calculate the root mean square error(RMSE).The consistency evaluation of intraclass correlation coefficient(ICC)for the repeatability of 3 measuring results obtained by different operators and the same operator.Results The differences in results of the two 3D measuring methods and the ruler method had no statistical significance;the differences between measuring results made by the structured-light scanning,single-camera photogrammetry and PDF reading software and that of the Photoshop lasso pixel method had no statistical significance.The post-processing of the single-camera photogrammetry consumed more time than that of other methods.When the long-distance group(10-40 cm)was measured,the results obtained by the ruler method were shorter than the standard value.The RMSE value results were structured-light scanning<single-camera photogrammetry<ruler method.The ICC value intragroup and intergroup were greater than 0.99.Conclusion Both structured-light scanning and single-camera photogrammetry can be applied in recording and measuring forensic body surface damage.The former has better performance in measurement accuracy and stability,while the latter has better color performance but longer post-processing time.

关 键 词：法医学 体表面积 瘢痕 摄影测量法 结构光学扫描 单相机摄影测量 

分 类 号：DF795.1[医药卫生—法医学]