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Skull sex determining method based on spatial analysis

An identification method and subspace technology, applied in character and pattern recognition, instruments, computer components, etc., can solve the problem of low correct identification rate of skull test sample sets, and achieve high accuracy and high degree of automation

Active Publication Date: 2012-12-19
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

But it is not easy to achieve accurate characteristic measurement on the computer
In addition, the correct identification rate of the current method for the skull test sample set is not high, basically no more than 90%

Method used

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  • Skull sex determining method based on spatial analysis

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Embodiment Construction

[0020] In order to introduce the technical solution of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the main steps of the skull sex identification method based on subspace analysis of the present invention include:

[0022] 1) Classification training

[0023] 1.1) Data normalization: perform non-rigid data registration on the skull data in the training sample set, normalize the posture and size of the skull data, and finally arrange each skull data into a high-dimensional original feature vector according to the coordinates of points;

[0024] 1.2) Subspace analysis: Perform subspace analysis on the normalized training sample data set to obtain the subspace projection matrix;

[0025] 1.3) Classifier design: project the training samples from the high-dimensional original feature space to the low-dimensional subspace, and design a classifie...

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Abstract

The invention relates to a skull sex determining method based on spatial analysis. The method comprises the following steps: carrying out data standardization on skull data of a training sample; carrying out sub-spatial analysis on a standardized training sample data set so as to obtain a sub-spatial projection matrix; projecting the training sample to a low dimensional sub-space from a high dimensional original feature space, wherein a classifier is designed in the low dimensional sub-space; projecting standardized unknown skull data to the low dimensional sub-space by using a sub-spatial projection matrix obtained from the training; and classifying in the low dimensional sub-space by using the designed classifier. With the adoption of the method, complex manual measurement or expert knowledge is not needed, and the accuracy can be more than 94%, so that the method has important application values in criminal investigation fields.

Description

technical field [0001] The invention relates to the technical field of computer applications, in particular to a method for classifying skull gender by using subspace features. It is mainly used in criminal investigation, archaeology, forensic anthropology and other fields. Background technique [0002] Gender identification based on human skeletal morphology is one of the most basic research contents in forensic anthropology. The skull is composed of hard tissue, which is not easy to be destroyed compared with other bones, and can survive relatively intact after death. In many cases, only the skull of the victim remains at the scene of the criminal investigation, without other clues about the origin of the victim. This makes classic inspection techniques such as DNA and cranial image coincidence useless. The skull can only be used for identification of the source of the corpse, and gender identification is one of them. first step. Compared with other primates, especially...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/66
Inventor 段福庆王梦扬周明全
Owner BEIJING NORMAL UNIVERSITY
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