Three-dimensional palatal wrinkle recognition method based on fractional Fourier transform

A fractional Fourier, recognition method technology, applied in forensic biometric identification patterns, biometric identification, character and pattern recognition, etc. The effect of speeding up the operation and simplifying the complexity

Pending Publication Date: 2020-10-09
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology

[0006] In order to solve the technical problem of lack of existing three-dimensional palate wrinkle digital image recognition technology, the present invention provides a method for identifying human body biological characteristics for forensic identity that can complete three-dimensional palate wrinkle recognition. The method is accurate and fast, and the recognition effect is good

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  • Three-dimensional palatal wrinkle recognition method based on fractional Fourier transform
  • Three-dimensional palatal wrinkle recognition method based on fractional Fourier transform
  • Three-dimensional palatal wrinkle recognition method based on fractional Fourier transform

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[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] A three-dimensional palatal wrinkle recognition method based on fractional Fourier transform, the specific steps are as follows:

[0032] Step 1: Use an intraoral scanner to scan the oral cavity to obtain three-dimensional palatal wrinkle point cloud data. Specifically, the acquisition device is a portable color intraoral scanner (including a scanning gun, USB key and software U disk, POD base, color calibration head and laptop computer). First, correct the position of the dental chair and adjust the position of the volunteer on the dental chair Make the vo...

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Abstract

The invention relates to a three-dimensional palatal wrinkle recognition method based on fractional Fourier transform and belongs to the technical field of forensic identification of human body biological characteristics. The method comprises the following steps: acquiring three-dimensional palatal wrinkle point cloud data in a mouth scanning mode; performing isometric slicing standardization processing on a three-dimensional palate wrinkle image; performing blocking and binarization processing on a palate wrinkle slice profile image; constructing a palatal wrinkle slice profile image database; extracting fractional domain characteristics of a palatal wrinkle curve in the palatal wrinkle slice profile image through fractional Fourier transform; carrying out feature selection on the fractional domain features based on an SVM-RFE method, and then selecting an optimal feature vector combination; and finally, carrying out three-dimensional palatal wrinkle identification. According to the method, the complexity of three-dimensional palatal wrinkle image recognition is simplified, rich palatal wrinkle slice profile curve characteristics can be extracted from a time domain and a frequencydomain by utilizing fractional Fourier transform, and the palatal wrinkle recognition effect is improved.

Description

technical field [0001] The invention belongs to the technical field of forensic identification of human biological characteristics, and in particular relates to a three-dimensional palate wrinkle identification method using equidistant slices and fractional Fourier transform feature extraction for forensic identification. Background technique [0002] The palatal crease is an irregular, asymmetrical ridge extending outward from the incisor papilla and the front of the palatal suture in the anterior third of the hard palate on the roof of the human mouth. Biometric identification is a technology that uses human physiological or behavioral characteristics for personal identification. As a new biometric feature, palate wrinkle is equivalent to fingerprint, face, iris, etc. in biometric identification. Each person's palate is unique. The palate retains its shape throughout a person's life, and only changes in length and width due to normal growth and development. The palatal f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/155G06V40/10
Inventor 张雄罗强李冰上官宏贾志纲武有成
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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