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A Identification Method Based on the Characteristic Structure of Dental Imprint Model

An identity recognition and feature structure technology, applied in the field of identity recognition, can solve problems such as insufficient experimental data and no technical reference, and achieve the effects of high matching accuracy, low model cost, and simple algorithm

Active Publication Date: 2021-06-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, domestic technical research in this area may have just started, and there are almost no known results, so the experimental data is seriously insufficient, and almost no technical reference can be found.

Method used

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  • A Identification Method Based on the Characteristic Structure of Dental Imprint Model
  • A Identification Method Based on the Characteristic Structure of Dental Imprint Model
  • A Identification Method Based on the Characteristic Structure of Dental Imprint Model

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Embodiment Construction

[0040] Further illustrate the present invention below in conjunction with accompanying drawing.

[0041] The identity recognition method of the characteristic structure of tooth print model of the present invention, comprises the following steps:

[0042] Step 1), collecting images;

[0043] (1.1) Make a bite model for the upper row of teeth;

[0044] (1.2) Place the dental impression model horizontally, at a fixed distance above the model, use the camera lens to take a clear image of the dental impression model at a vertical angle, and focus on the overall impression;

[0045] (1.3) Keep the distance and angle of the camera lens unchanged, rotate the center of the dental impression model for multiple times, and take multiple shots to obtain multiple impression images of different orientations;

[0046] Step 2), image processing: on the basis of step 1), intercept the dental impression model part in the image to eliminate possible background interference. The final captured...

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Abstract

A kind of identity recognition method based on toothprint model characteristic structure, comprises: following steps: step 1), collecting image; Step 2), process image: on the basis of step 1), intercept the toothprint model part in the image, get rid of possible Background interference; step 3), contour segmentation step 4), feature value extraction: step 5), building database: step 6), calculating matching function; step 7), matching. Under the condition of well-segmented tooth-print model images, the present invention realizes feature value matching of tooth-print contours, and experimental results show that the present invention can effectively realize tooth identification.

Description

technical field [0001] The invention relates to an identification method. Background technique [0002] In law enforcement, "Forensic identification may occur before death, which is known as antemortem (AM) identification. Identification may also be performed after death, which is known as postmortem (PM) identification." When the victim's soft tissue is severely decomposed or During large-scale disasters such as fire or collision, most behavioral and physiological features are not suitable for PM identification. And teeth are the hardest and most indestructible part of the human body, so they are considered the best choice for PM identification. [0003] At present, foreign researchers have relatively perfected the biometric technology based on the characteristic structure of teeth. With the help of dental X-rays, they proposed an automatic tooth identification system (ADIS), which involves tooth segmentation, tooth classification, tooth number and Identification, thereby...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V40/155G06V40/10G06V10/443G06F18/22
Inventor 毛家发王力鑫李松琼陈丽格高飞肖刚朱李楠
Owner ZHEJIANG UNIV OF TECH