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Workpiece anti-counterfeiting method based on part surface image matching

A surface image and component technology, applied in the field of workpiece anti-counterfeiting based on component surface image matching, can solve problems such as difficult detection of bearings, bearing damage, and difficult detection of bearings, and achieve reduced anti-counterfeiting costs, high anti-counterfeiting security, and improved robustness. sticky effect

Pending Publication Date: 2020-06-23
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flood of counterfeit and shoddy bearings in the market has caused great harm to the industry, especially the precision industry
However, many parameters of the bearing are difficult to detect without disassembling the bearing (for example, the concentricity of the ball bearings, the parallelism of the raceway), and once disassembled, the bearing will be irreversibly damaged, and the detection will be lost. meaning
Therefore, it is very difficult to detect the authenticity of bearings only from the appearance of the bearing or the actual precision level of the bearing.
[0005] At present, the anti-counterfeiting of workpieces is still a difficult problem

Method used

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  • Workpiece anti-counterfeiting method based on part surface image matching
  • Workpiece anti-counterfeiting method based on part surface image matching
  • Workpiece anti-counterfeiting method based on part surface image matching

Examples

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Embodiment

[0093] In this example, in figure 1 Part 1 and Part 2 are used as sample 1 and sample 2. Sample 1 and sample 2 are areas with a roughness of 0.1 μm in the common surface roughness comparison sample. Under naked eye observation, the surfaces with uniform roughness are very similar . figure 2 Among them, 3 is the image acquisition hardware - the digital microscope of Keyence VHX 5000 on sale, which can realize automatic focusing and automatic image stitching. The resolution of the collected single image is 1200pixels×1600pixels, and the maximum resolution after splicing can reach 20000pixels×20000pixels.

[0094] Concrete anti-counterfeit identification method of the present invention is realized by the following steps:

[0095] Step 1. Sample pretreatment:

[0096] exist figure 1 Randomly select a small area on the parts 1 and 2 in the box, and mark the 1-1 area and 2-1 area with the word '+', as the anti-counterfeiting detection area mark.

[0097] Step 2. Image acquisit...

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Abstract

The invention relates to the field of part anti-counterfeiting identification, in particular to a workpiece anti-counterfeiting method based on part surface image matching, which comprises the following steps of factory workpiece surface image acquisition, image filtering, surface inherent texture extraction, database generation, texture feature image matching and anti-counterfeiting identification. The invention relates to a method for extracting a surface image of a workpiece by utilizing digital microscope equipment and identifying the authenticity of the workpiece by virtue of an image processing algorithm. By means of the anti-counterfeiting method, workpiece etching can be avoided, and nondestructive identification is achieved; an additional anti-counterfeiting label is not needed, so that the anti-counterfeiting cost is reduced; and the uniqueness of the surface texture of the workpiece is utilized, so that the anti-counterfeiting safety is extremely high.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting identification of workpieces, in particular to a method for anti-counterfeiting of workpieces based on surface image matching of parts. Background technique [0002] In recent years, many lawbreakers, driven by interests, have manufactured counterfeit products to confuse genuine ones. Consumers and many companies have suffered from counterfeiting. Relevant survey data show that more than 90% of consumers and almost all product manufacturers have been harassed by counterfeiting. [0003] In the manufacturing industry, there are also the phenomenon of fake and inferior products and shoddy goods, which not only violates the rights and interests of consumers, but also poses a huge safety hazard. In order to combat counterfeiting, many famous brand manufacturers are currently trying to use laser engraving of the corresponding brand logo on the surface of the product, or set a unique serial number fo...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/00
CPCG06T7/001G06T5/70
Inventor 洪荣晶诸嘉翎张浩
Owner NANJING UNIV OF TECH
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