Pre‐set estimation‐based in‐silico silhouette‐based methodology for improving the robustness to viewing direction difference for assisting forensic gait analysis

Pre‐set estimation‐based in‐silico silhouette‐based methodology for improving the robustness to viewing direction difference for assisting forensic gait analysis
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基于预设估计的基于计算机轮廓的方法,用于提高观察方向差异的鲁棒性,以辅助法医步态分析

DOI:
10.1111/1556-4029.15214
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发表时间:
2023
影响因子:
1.6
通讯作者:
Kurosawa Kenji
Kurosawa Kenji
中科院分区:
医学4区
文献类型:
--
作者:
Imoto Daisuke;Hirabayashi Manato;Honma Masakatsu;Kurosawa Kenji

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法医步态分析用于直观和定量地分析有关步行外观和风格的信息,这些信息可以在法庭上作为证据。在视频监控中分析闭路电视行人录像的需求一直在增加。法医科学中经常使用的基于轮廓的半自动分析的准确性对观察方向差异的依赖性是一个非常具有挑战性的问题,在实际案例应用中尚未得到解决。目前,在使用日本法医学领域经常使用的基于轮廓的方法时,比较镜头中使用的不同观看方向显着降低了同一人分析的准确性。之前提出了一种基于校准的方法来解决这个问题,但它需要在相机安装现场执行复杂的测量程序才能进行准确的分析。在本研究中,我们提出了一种新颖的基于计算机轮廓的分析方法,该方法将观察方向预设设置的数量从之前方法中使用的 24 个显着扩展至 900 个。已经开发了多种软件工具以确保所有程序都可以在计算机上执行。实验结果证实该方法的准确性与基于校准的方法相当。此外,实际咨询的实际比较结果证实了该方法在现有观看方向差异下的有效性。因此,我们预计所提出的方法将有利于提高实际情况下的分析精度,从而可以替代以前的方法。
Forensic gait analysis is used to visually and quantitatively analyze information regarding the appearance and style of walking that can be presented as evidence in the court. The demand for analyzing CCTV pedestrian footage in video surveillance has been increasing. The dependence of the accuracy of semiautomatic silhouette‐based analysis, often used in forensic science, on the differences in the viewing directions is a very challenging issue that is yet to be resolved for real case applications. Currently, the different viewing directions used in comparison footage significantly decrease the accuracy of same person analysis when using the silhouette‐based method, often used in the Japanese forensic science domain. A calibration‐based method was previously prosed to resolve this problem, but it requires performing an elaborate measurement procedure at the camera installation site for an accurate analysis. In this study, we propose a novel in‐silico silhouette‐based analysis method that significantly expands the number of viewing direction pre‐set settings to 900 from the 24 used in the previous method. Several software tools have been developed to ensure that all the procedures can be executed on a computer. The experimental results confirm that the accuracy of the proposed method is comparable to that of the calibration‐based method. Furthermore, the practical comparison results from actual consultation confirmed the effectiveness of the proposed method under existing viewing direction differences. We therefore anticipate that the proposed method will be beneficial for improving the analysis accuracy in real cases and therefore serve as a substitute of the previous method.
增强法医步态分析针对近距离观看方向差异的鲁棒性
DOI: 10.1007/s11042-022-12751-0
发表时间: 2022
影响因子: 3.6
作者:
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期刊: 2010 18th European Signal Processing Conference
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