Skull Sex Estimation Based on Wavelet Transform and Fourier Transform.

Wen Yang,Pengfei Zhang,Guohua Geng,Haibo Zhang,Mingquan Zhou,Xiaoning Liu

doi:10.1155/2020/8608209

Wen Yang, Pengfei Zhang + Show 4 more

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https://doi.org/10.1155/2020/8608209

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Abstract

Skull sex estimation is one of the hot research topics in forensic anthropology, and has important research value in the fields of criminal investigation, archeology, anthropology, and so on. Sex estimation of skull is crucial in forensic investigations, whether in legal situations that involve living people or to identify mortal remains. The aim of this study is to establish a skull-based sex estimation model in Chinese population, providing a scientific reference for the practical application of forensic medicine and anthropology. We take the superior orbital margin and frontal bone of the skull as the research object and proposed a technology of objective sex estimation of the skull using wavelet transform and Fourier transform. Firstly, the supraorbital margin and frontal bone were quantified by wavelet transform and Fourier transform, and then the extracted features were classified by SVM, and the model was tested. The experimental results show that the accuracy rate of male and female sex discrimination is 90.9% and 94.4%, respectively, which is higher than that of morphological and measurement methods. Compared with the traditional methods, the method has more theoretical basis and objectivity, and the correct rate is higher.

Highlights

In the practice of forensic identification, it is often the case that a corpse is dismembered and highly decomposed leaving only skeletal remains, or that only skeletal remains are left in a major disaster
In the context of forensic analysis, sex estimation together with assessment of racism, population affinity, and stature is important for the process of individual identification. e sex estimation based on skeletal remains is based on sexual dimorphism, which is generally present to varying degrees in bones of human skeleton
There are 13 males and 10 females. e results are based on measurements of the supraorbital margin valley. e experimental environment is as follows: implemented using Matlab R2015a, all the experimental programs are executed on personal computers with 3.40 GHz CPU and 8G RAM

Summary

Introduction

In the practice of forensic identification, it is often the case that a corpse is dismembered and highly decomposed leaving only skeletal remains, or that only skeletal remains are left in a major disaster. E identification of unknown skeletal remains is an important part of anthropological and forensic research. Sex estimation of unknown bones is a very important part of anthropological and forensic analysis. In the context of forensic analysis, sex estimation together with assessment of racism, population affinity, and stature is important for the process of individual identification. E sex estimation based on skeletal remains is based on sexual dimorphism, which is generally present to varying degrees in bones of human skeleton. The pelvis is not easy to store and fragile, and the skull is composed of hard tissue, which in most cases can be well preserved, and the stability of the sexual dimorphic features is better [5, 6]

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