Purpose

Forensic dentistry is the application of dentistry in legal proceedings that arise from any facts relating to teeth. The ultimate goal of forensic odontology is to identify the individual when there are no other means of identification such as fingerprint, Deoxyribonucleic acid (DNA), iris, hand print and leg print. The purpose of selecting dental record is for the teeth to be able to withstand decomposition, heat degradation up to 1600  ^° C. Dental patterns are unique for every individual. This work aims to analyze the contour shape extraction and texture feature extraction of both radiographic and photographic dental images for person identification.

Design/methodology/approach

To achieve an accurate identification of individuals, the missing tooth in the radiograph has to be identified before matching of ante-mortem (AM) and post-mortem (PM) radiographs. To identify whether the missing tooth is a molar or premolar, each tooth in the given radiograph has to be classified using a k-nearest neighbor (k-NN) classifier; then, it is matched with the universal tooth numbering system. In order to make exact person identification, this research work is mainly concentrate on contour shape extraction and texture feature extraction for person identification. This work aims to analyze the contour shape extraction and texture feature extraction of both radiographic and photographic images for individual identification. Then, shape matching of AM and PM images is performed by similarity and distance metric for accurate person identification.

Findings

The experimental results are analyzed for shape and feature extraction of both radiographic and photographic dental images. From this analysis, it is proved that the higher hit rate performance is observed for the active contour shape extraction model, and it is well suited for forensic odontologists to identify a person in mass disaster situations.

Research limitations/implications

Forensic odontology is a branch of human identification that uses dental evidence to identify the victims. In mass disaster circumstances, contours and dental patterns are very useful to extract the shape in individual identification.

Originality/value

The experimental results are analyzed both the contour shape extraction and texture feature extraction of both radiographic and photographic images. From this analysis, it is proved that the higher hit rate performance is observed for the active contour shape extraction model and it is well suited for forensic odontologists to identify a person in mass disaster situations. The findings provide theoretical and practical implications for individual identification of both radiographic and photographic images with a view to accurate identification of the person.

中文翻译：

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基于轮廓和纹理的法医牙科受害者识别分析

目的

法医牙科是牙科在与牙齿有关的任何事实引起的法律诉讼中的应用。法医牙科学的最终目标是在没有其他识别手段如指纹、脱氧核糖核酸（DNA）、虹膜、手印和腿印的情况下识别个体。选择牙科记录的目的是让牙齿能够承受高达 1600  ^° C 的分解、热降解。每个人的牙齿图案都是独一无二的。本工作旨在分析用于人识别的放射照相和照相牙科图像的轮廓形状提取和纹理特征提取。

设计/方法/方法

为了准确识别个体，必须在匹配生前 (AM) 和死后 (PM) 射线照片之前识别射线照片中缺失的牙齿。为了识别缺失的牙齿是臼齿还是前臼齿，必须使用 k-最近邻 (k-NN) 分类器对给定 X 光片中的每颗牙齿进行分类；然后，它与万能齿数系统相匹配。为了进行准确的人物识别，本研究工作主要集中在轮廓形状提取和纹理特征提取方面进行人物识别。这项工作旨在分析用于个体识别的射线照相和摄影图像的轮廓形状提取和纹理特征提取。然后，

发现

对实验结果进行了分析，用于放射照相和照相牙科图像的形状和特征提取。通过该分析，证明了主动轮廓形状提取模型具有更高的命中率性能，并且非常适合法医牙科医生在大规模灾难情况下识别人员。

研究限制/影响

法医牙科学是人类鉴定的一个分支，它使用牙科证据来识别受害者。在大规模灾难情况下，轮廓和牙齿图案对于提取个人识别中的形状非常有用。

原创性/价值

实验结果分析了射线照相和摄影图像的轮廓形状提取和纹理特征提取。通过该分析，证明了主动轮廓形状提取模型具有更高的命中率性能，并且非常适合法医牙科医生在大规模灾难情况下识别人员。研究结果为个人识别射线照相和摄影图像提供了理论和实践意义，以准确识别人。