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Class identification method of ivory products

A technology of ivory products and identification methods, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., and can solve the problems of low efficiency of identification methods and the inability to identify ivory products without damage

Active Publication Date: 2020-09-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of low efficiency in the existing identification methods of ivory products, and the problem that it is impossible to carry out non-damage identification for ivory products without standard cross-sections

Method used

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  • Class identification method of ivory products
  • Class identification method of ivory products
  • Class identification method of ivory products

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0027] The present embodiment is the category identification method of ivory product, comprises the following steps:

[0028] The method for identifying the category of ivory products includes the following steps:

[0029] 1. Judging the orientation of ivory products:

[0030] The orientation of the ivory product is judged by the Shi's line on the longitudinal section of the ivory product; or, when the ivory product has a tooth core, the orientation is judged by the tooth core line;

[0031] 2. Fix the ivory products and adjust the angle:

[0032] Taking one end or one side of the ivory product as a reference point, make the side of the Schwarzenegger line in the direction of the longitudinal section of the ivory product near the reference point perpendicular to the placement plane of the fixing seat, and fix the ivory product, which can be calibrated with an infrared level; or, When the tooth core exists, the side of the tooth core line close to the reference point is direc...

specific Embodiment approach 2

[0038] The method for identifying the category of ivory products includes the following steps:

[0039] 1. Judging the orientation of ivory products:

[0040] The orientation of the ivory product is judged by the Shi's line on the longitudinal section of the ivory product; or, when the ivory product has a tooth core, the orientation is judged by the tooth core line;

[0041] 2. Fix the ivory products and adjust the angle:

[0042] Taking one end or one side of the ivory product as a reference point, make the side of the Schwarzenegger line in the direction of the longitudinal section of the ivory product near the reference point perpendicular to the placement plane of the fixing seat, and fix the ivory product, which can be calibrated with an infrared level; or, When the tooth core exists, the side of the tooth core line close to the reference point is directly perpendicular to the placement plane of the fixing seat, and the ivory product is fixed.

[0043] 3. Determine the ...

Embodiment 1

[0048] The present embodiment takes the spherical body ivory product as the object to identify,

[0049] 1. Determine the orientation of the ivory spheroid:

[0050] The nearly lateral direction of the ivory has a Schneider structure, the Schneider's line and the Scherner's angle correspond to the upper and lower sides; for example figure 2As shown, A1 is the outer edge of the ivory, A2 is the inner side of the ivory, A3 is the transverse section of the ivory, and A4 is the longitudinal section of the ivory; B1 is the cementum, B2 is the dentin; C1 is the Schönde's line, C2 is the Schönde's angle; Marginal Shirley's angle (closer to the cementum side) was greater than the medial Shirley's angle (closer to the tooth core side). In the longitudinal direction, the Shi's structure appears as a nearly straight line, corresponding to both sides. When the tooth core exists, use the tooth core line to judge the corresponding orientation (including the position of the ivory product ...

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Abstract

The invention discloses an ivory product category identification method, belongs to the field of ivory product identification technologies and aims to solve the problems that an existing ivory productidentification method is low in efficiency and cannot be used for performing undamaged identification on ivory products without standard cross sections. According to the method, firstly, the direction of an ivory product is judged, and the ivory product is fixed; then, the fixed ivory product is placed on an anatomical lens carrying table, an automatic focusing module is utilized to perform continuous focusing to collect multi-frame frames, an image with a high depth of field is synthesized automatically, and a projection of a Molisch's angle, namely the Molisch's angle on a standard cross section, is obtained; or a digital camera is utilized to collect an image of the ivory product with the requirement that a focal plane is parallel to a placement plane, a cross-section image projected on an outer edge is shot, and an included-angle projection of two groups of curves, namely the Molisch's angle, is obtained; and next, software is utilized to measure the Molisch's angle, and then whether the ivory product is a living ivory or a mammoth ivory is identified. The method is mainly used for ivory product category identification.

Description

technical field [0001] The invention relates to a method for class identification of ivory products, which belongs to the technical field of identification of ivory products. Background technique [0002] Ivory includes living ivory and mammoth ivory. The former belongs to endangered animals and is subject to control. It is illegal to operate and use ivory products. The latter is extinct and is not subject to trade control of animal products. The key to identifying ivory products is to distinguish whether they are living ivory. Currently, the identification methods for distinguishing living ivory from mammoth ivory mainly include DNA methods and morphological methods. However, the cost of DNA identification method is high and the efficiency is low. Moreover, the DNA method will destroy the ivory products, and if it is finally confirmed that the ivory products are mammoth ivory products, the party concerned will be compensated. The morphological method of identification of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84G01N21/01
CPCG01N21/01G01N21/84G01N2021/0112
Inventor 王震白素英李妍妍金煜马跃李波
Owner NORTHEAST FORESTRY UNIVERSITY