...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Forensic science international >Determination of chronological order of crossed lines of ballpoint pens by hyperspectral image in the visible region and multivariate analysis
【24h】

Determination of chronological order of crossed lines of ballpoint pens by hyperspectral image in the visible region and multivariate analysis

机译：高光谱图像在可见区域和多变量分析中测定圆珠笔交叉线路的时间顺序

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Determining the chronological order of crossed lines is a recurrent problem in forensic analysis o f documents. One o f the most important requirement o f these analyses is the use of non-destructive techniques to maintain the integrity of the documents for further analysis as judicial evidences. Thus, this work proposes an objective, non-destructive, easy-to-execute analysis protocol for forensic analysis, using the hyperspectral mode of the VSC6000 (R), which is an equipment found in most laboratories of questioned documents. Seven blue ballpoint pens of different brands were used to make crossings on white paper, a total of 49. The spectra were obtained from 400 to 1000 nm, and analyzed with HYPER-Tools. Initially, univariate analysis was used, selecting discriminating wavelengths to visualize the images and determine the chronological order of the crossings, and then, when necessary, a multivariate approach using Multivariate Curve Resolution Alternating Least Squares (MCR-ALS) was applied. The interpretation of the order was made visually, taking into account characteristics of the strokes, such as the continuity and amount of ink. In this way, it was possible to determine the chronological order of 31/49 crossings, which corresponds to an overall rate of 63% accuracy. The method was validated by performing a double-blind test with 8 crossings, which indicated only a small influence of the analyst. The method was also applied to the analysis of a police inquiry, which was provided by the Federal Police and compared with the routine analyzes. The results were concordant but the proposed method provided a more objective analysis than the ones currently in practice at the Police. (C) 2019 Elsevier B.V. All rights reserved.
机译：确定交叉线的时间顺序是法医分析O F文件中的复发问题。 One O F最重要的要求O F分析是使用非破坏性技术来维持文件的完整性，以便进一步分析作为司法证据。因此，使用VSC6000（R）的高光谱模式，这项工作提出了一种目标，非破坏性，易执行的分析协议，用于法医分析，该方法是在质疑文档的大多数实验室中发现的设备。七个不同品牌的蓝色圆珠笔钢笔在白皮书中发出过境，共49段。光谱从400〜1000nm获得，并用超工具分析。最初，使用单变量分析，选择鉴别波长以可视化图像并确定交叉的时间顺序，然后，当需要时，使用使用多变量曲线分辨率交替最小二乘（MCR-ALS）的多变量方法。在视觉上进行了对订单的解释，考虑到招步的特征，例如墨水的连续性和数量。以这种方式，可以确定31/49交叉的时间顺序，其对应于精度为63％的总速率。通过用8个交叉进行双盲试验来验证该方法，这仅表明了分析师的少量影响。该方法还应用于对警方查询的分析，由联邦警察提供，​​并与常规分析进行比较。结果符合协调一体，但该方法提供比目前在警方实践中的更具客观的分析。 （c）2019年Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号