CN109543804A - A kind of method of Ceramic anti-fake and verifying - Google Patents
A kind of method of Ceramic anti-fake and verifying Download PDFInfo
- Publication number
- CN109543804A CN109543804A CN201811431742.4A CN201811431742A CN109543804A CN 109543804 A CN109543804 A CN 109543804A CN 201811431742 A CN201811431742 A CN 201811431742A CN 109543804 A CN109543804 A CN 109543804A
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- Prior art keywords
- ceramic
- ceramics
- fingerprint
- positioning
- cryptographic hash
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0025—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K2019/06215—Aspects not covered by other subgroups
- G06K2019/06271—Relief-type marking
Abstract
The invention discloses a kind of method that ceramic fingerprint is extracted in positioning, user scans ceramic surface with positioning camera one, in the region that ceramic surface search and locating template are overlapped, then uses the extracted region ceramics fingerprint of two Scan orientation Template Location of camera；And a kind of method for anti-counterfeit of ceramics, user obtain ceramic fingerprint one using the method that ceramic fingerprint is extracted in a kind of positioning, and the ceramic fingerprint one is then deployed to block catenary system；A kind of anti-counterfeit authentication method of ceramics simultaneously, user obtains the ceramic fingerprint one from block catenary system, ceramic fingerprint two is obtained followed by the method that ceramic fingerprint is extracted in a kind of positioning, the fake certification of ceramics is then realized by the consistency of the identification comparison ceramic fingerprint one and the ceramic fingerprint two.
Description
Technical field
The present invention relates to the information processing technology and field of anti-counterfeit technology more particularly to the sides of a kind of Ceramic anti-fake and verifying
Method.
Background technique
Ceramics are pursued by people in recent years as the object of collection and investment, since famous-object quantity is few, valence
Lattice are high, driven by interests, and many famous brand art name porcelain cups are without restraint counterfeit, how to carry out anti-fake and identification to ceramic product
Seem most important.From the point of view of material microstructure, bright and clean ceramic surface is actually the mixing of crystal and vitreum
Body, exists simultaneously the microcosmic stomata of the round or ellipse of random distribution, these stomatas are in invisible, the irregular distribution of naked eyes
Feature, it is specific ceramic " fingerprint " to become ceramic product.
Ceramic fingerprint can be used to uniquely determine a ceramic works, but since ceramic fingerprint is the microscopic feature of ceramics,
An identical ceramics must can just extract identical ceramic fingerprint in same position, how in ceramic surface navigate to phase
Ceramic fingerprint is extracted in same position, is one of the critical issue that Ceramic anti-fake and uniqueness verifying are realized using ceramic fingerprint,
Intuitively, can be directly in ceramic surface labeling position, or the label for labelling positions such as two dimensional code are used, but these labeling positions
Localization method may will affect the surface aesthetic feeling of ceramics on ceramics.
In addition, although much ceramics identification method is all using the microscopic feature of surface of ceramic products as foundation, how
Block chain technology is made full use of to realize the anti-fake of ceramic product trusty, fidelity and trace to the source, currently still without good solution
Certainly scheme.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of methods that ceramic fingerprint is extracted in positioning, in the system of ceramics
The sender of work side or circulation ceramics, user scan ceramic surface with positioning camera one, in ceramic surface search and locating template
The region of coincidence obtains ceramics followed by the region with amplification or the two Scan orientation Template Location of camera of microscopic function and refers to
Line.
Optionally, the locating template can be the subgraph the most apparent of feature in ceramic surface pattern；
Optionally, the locating template can be author's inscription image of ceramics or the mark of Production of Ceramics producer
Image.
Optionally, user can determine locating template according to the picture on surface of ceramics and the description information of ceramics；
Optionally, the description information of the ceramics includes the author information of ceramics, the production information of ceramics, pottery
The recommended information of the porcelain art work, or manufacturer's information of ceramics, ceramic production information；
Optionally, the ceramic surface pattern can be user using camera shoot ceramic surface image or it is existing with it is ceramic
The consistent digital picture of picture on surface.
Optionally, the positioning camera one can be made of one or more cameras, and ceramics are rapidly and accurately scanned with this
Picture on surface.
Optionally, the camera is second is that the camera with amplification or microscopic function, and the camera is second is that with lighting source
Camera.
The present invention also provides a kind of method for anti-counterfeit of ceramics to use in the production side of ceramics or the sender of circulation ceramics
Family obtains ceramic fingerprint one first with the method that ceramic fingerprint is extracted in a kind of positioning, then by the ceramic fingerprint one
It is deployed in block catenary system, obtains the cryptographic Hash one that block catenary system returns.
Optionally, user issues trading instruction to block catenary system, the number by the ceramic fingerprint one as trading instruction
According to part, the ceramic fingerprint one is deployed to block catenary system to realize, and obtain the cryptographic Hash of block catenary system return
One.
Optionally, the ceramic fingerprint one is uploaded the data center, the number first by settable data center, user
After being supervised according to center to the ceramic fingerprint one, returns to the ceramic fingerprint one and linked in the access of the data center, then
User issues trading instruction to block catenary system, the data portion by the access link as trading instruction, block catenary system
The ceramic fingerprint one is obtained from data center by access link, the ceramic fingerprint one is deployed to area to realize
Block catenary system, and obtain the cryptographic Hash one of block catenary system return.
Optionally, user disposes intelligent contract to block catenary system, and obtains the unique identification institute of block catenary system return
State the cryptographic Hash two of intelligent contract；
Optionally, the intelligent contract is digital incarnation of the ceramics in block catenary system, and the cryptographic Hash is second is that described
The unique identification of intelligent contract, that is, the unique numerical identification of the ceramics.
Optionally, the cryptographic Hash one is encoded into two dimensional code, and two dimensional code is labeled in ceramic surface.
Optionally, the cryptographic Hash two is encoded into two dimensional code, and two dimensional code is labeled in ceramic surface.
It optionally, also include other information in the two dimensional code；
Optionally, the two dimensional code of open code system can be selected in the two dimensional code, and the two dimensional code of privately owned code system also can be selected.
It is alternatively possible to which the two dimensional code is printed upon on Pasting label, then it is pasted onto ceramic surface；
It is alternatively possible to which direct engraving is in article surface by the two dimensional code by laser marking machine.
Optionally, when ceramic surface marks the two dimensional code, since the two dimensional code does not undertake positioning function, then by institute
State two dimensional code be labeled in ceramics the back side or other do not influence the position of ceramic surface pattern beauty.
Optionally, after the cryptographic Hash one of acquisition and the cryptographic Hash two, user issues into block catenary system
The association of the cryptographic Hash one and the cryptographic Hash two is established in trading instruction；
Optionally, user can call the intelligent contract-defined interface one using the cryptographic Hash two into block catenary system, transmit institute
Cryptographic Hash one is stated, to establish the association of the cryptographic Hash one and the cryptographic Hash two.
Optionally, user can dispose the locating template to block catenary system, and obtain the Hash of block catenary system return
Value three；
Optionally, user issues the pass that the cryptographic Hash three and the cryptographic Hash two are established in trading instruction into block catenary system
Connection.
Optionally, the locating template is uploaded data center, will acquire the locating template by settable data center
Method is encoded into after the two dimensional code, is marked in the ceramic surface, or the method for obtaining the locating template is disposed
It is associated with to block catenary system, and with the cryptographic Hash two foundation.
Optionally, settable data center records process video of the ceramics in production side production, producer
The data such as biological characteristic upload data center, and the access link and cryptographic Hash for uploading data, production side are generated by data center
The access link of data center's return and cryptographic Hash are also registered in block as with the associated data information of the ceramic product
Chain.
Optionally, all side consistent with ceramic making side can be used by channel side in each link that the ceramics flow through
Method is registered and the associated channel information of ceramics in block catenary system.
The present invention also provides a kind of anti-counterfeit authentication method of ceramics, when needing to verify ceramics, 1) user utilizes mark
Block catenary system is accessed in the two dimensional code of ceramic surface, and obtains the ceramic fingerprint one, 2) it is fixed followed by described one kind
The ceramic fingerprint two of method acquisition of the ceramic fingerprint of position extraction, 3) then by identifying the comparison ceramics fingerprint one and the ceramics
The consistency of fingerprint two come realize ceramics fake certification.
Optionally, user extracts cryptographic Hash one from the two dimensional code for be labeled in ceramic surface, then is obtained with the cryptographic Hash one
Take the ceramic fingerprint one；
Optionally, user extracts cryptographic Hash two from the two dimensional code for be labeled in ceramic surface, and utilizes the cryptographic Hash two to area
The intelligent contract-defined interface two is called in block catenary system, obtains the cryptographic Hash one, then the pottery is obtained with the cryptographic Hash one
Porcelain fingerprint one.
Optionally, user can obtain the locating template from block catenary system；
Optionally, user can obtain the locating template from data center.
Optionally, the condition that user obtains ceramic fingerprint two should be obtained with the production side of ceramics or the sender of circulation ceramics
It is described ceramics fingerprint one it is consistent.
Optionally, the sequence of the step 1) and the step 2 can overturn, and not influence beneficial effects of the present invention.
The beneficial effect comprise that one, using positioning camera scanning ceramic surface pattern, and pass through locating template
The position for extracting ceramic fingerprint is positioned in ceramic surface, is avoided and is marked the positioning mark of influence ceramic surface beauty in ceramic surface
Know；Secondly, due to encoding in block catenary system the two dimensional code of ceramic Hash do not undertake positioning responsibility, can freely will be two-dimentional
Code is labeled in any position of ceramic surface；Thirdly, due to the ceramics of the two dimensional code and block catenary system be it is one-to-one,
It is one-to-one with locating template and ceramic fingerprint, so criminal marks the two dimensional code on other ceramics
When, will cause can not location fingerprint extract position or can not verify ceramic fingerprint.Four, by identifying and comparing ceramic fingerprint,
The anti-fake and uniqueness verifying of ceramics can be achieved.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.
Fig. 1 is a kind of flow chart of the method for the ceramic fingerprint of positioning extraction described in one embodiment of the present of invention.
Fig. 2 is a kind of structural schematic diagram of the method for the ceramic fingerprint of positioning extraction described in one embodiment of the present of invention.
Fig. 3 is the structural schematic diagram of ceramic fingerprint described in one embodiment of the present of invention.
Fig. 4 is a kind of flow chart of the method for anti-counterfeit of ceramics described in one embodiment of the present of invention.
Fig. 5 is a kind of flow chart of the anti-counterfeit authentication method of ceramics described in one embodiment of the present of invention.
Fig. 6 is that a kind of method for anti-counterfeit of the ceramics of one embodiment of the present of invention and block catenary system carry out instruction friendship
Mutual structural schematic diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as a limitation of the invention.
As shown in Figure 1 to Figure 3, An embodiment provides a kind of method that ceramic fingerprint is extracted in positioning,
Detailed description are as follows for specific method step.
Step S101, the description information and ceramic surface pattern 202 of ceramics 201 are obtained；
Wherein, ceramic 201 description information include the author information of ceramics, ceramics production information,
The recommended information of ceramics, or manufacturer's information of ceramics, ceramic production information etc.；
Wherein, the ceramic surface pattern 202 can be ceramic surface image or existing and institute of the user using camera shooting
State the consistent digital picture of ceramic surface pattern 202.
Step S102, locating template 205 is determined；
Wherein, the locating template 205 is a sub-pattern of the ceramic surface pattern 202, and is and the ceramics
The sub-pattern that description information is closely related can be author's inscription image or the Production of Ceramics producer of ceramics
Mark image；
Wherein, the locating template 205 can be feature subgraph the most apparent in the ceramic surface pattern 202；
Wherein, the region 204 comprising the ceramic fingerprint of extraction in the locating template 205.
Step S103, ceramic surface is scanned using positioning camera one, positions locating template 205；
Wherein, the positioning camera one can be made of one or more cameras, and the exterior view of ceramics is rapidly and accurately scanned with this
Case；
Wherein, during the positioning camera scans ceramic surface, the processing module being connected with positioning camera is located in real time
Manage matching of the locating template 205 in scanning result.
Step S104, ceramic fingerprint is extracted using camera two:
Wherein, the camera is second is that the camera with amplification or microscopic function, and the camera is second is that the camera with lighting source；
Wherein, the pattern that the shooting of camera two is positioned by the ceramic fingerprint extraction region 204, as shown in figure 3, the camera
The ceramic pattern 301 of two shootings, and ceramic fingerprint 302 is constituted with this abstract characteristics for extracting the ceramic pattern 301.
In conclusion a kind of method that ceramic fingerprint is extracted in positioning described in one embodiment of the invention, in the system of ceramics
The sender of work side or circulation ceramics obtains the description information and ceramic surface pattern of ceramics, then according to the table of ceramics first
The description information of face pattern and ceramics determines locating template, then scans ceramic surface with positioning camera, in the exterior view of ceramics
The region being overlapped with locating template is searched in case, utilizes the two Scan orientation Template Location of camera with amplification or microscopic function
Region obtains ceramic fingerprint.
As shown in Figure 4 and Figure 6, An embodiment provides a kind of method for anti-counterfeit of ceramics, specific methods
Detailed description are as follows for step.
Step S401, the intelligence and about 601 that ceramics are represented to the deployment of block catenary system obtains block catenary system and returns to Hash
Value 1；
Wherein, the intelligence and about 601 is digital incarnation of the ceramics in block catenary system, and the cryptographic Hash 1 is
The intelligence and about 601 unique identification, that is, the unique numerical identification of the ceramics.
Step S402, the described cryptographic Hash 1 is attached to article surface；
Wherein, the cryptographic Hash 1 is encoded into two dimensional code, and two dimensional code is labeled in ceramic surface；
It wherein, also include other information in the two dimensional code；
Wherein, the two dimensional code of open code system can be selected in the two dimensional code, and the two dimensional code of privately owned code system also can be selected；
Wherein it is possible to which the two dimensional code is printed upon on Pasting label, then it is pasted onto ceramic surface；
Wherein it is possible to which direct engraving is in article surface by the two dimensional code by laser marking machine；
Wherein, when ceramic surface marks the two dimensional code, since the two dimensional code does not undertake positioning function, then by the two dimension
Code be labeled in ceramics the back side or other do not influence the position of ceramic surface pattern beauty.
Step S403, ceramic fingerprint one is extracted；
Wherein, user obtains ceramic fingerprint one using the method that ceramic fingerprint is extracted in a kind of positioning.
Step S404, ceramic fingerprint one is disposed to block catenary system, obtains block catenary system and returns to cryptographic Hash two；
Wherein, user can issue trading instruction 603 to block catenary system, regard the ceramic fingerprint one as the trading instruction
The ceramic fingerprint one is deployed to block catenary system to realize, and obtains the return of block catenary system by 603 data portion
Cryptographic Hash 2 604；
Wherein, the ceramic fingerprint one is uploaded the data center, the data center first by settable data center, user
After being supervised to the ceramic fingerprint one, return to the ceramic fingerprint one and linked in the access of the data center, then user to
Block catenary system issues trading instruction 603, the data portion by the access link as the trading instruction 603, block chain
System is linked from data center by the access and obtains the ceramic fingerprint one, disposes the ceramic fingerprint one to realize
To block catenary system, and obtain the cryptographic Hash 2 604 of block catenary system return.
Step S405, the intelligent contract-defined interface 1 is called to transmit the cryptographic Hash two in block catenary system；
Wherein, user can call the intelligent contract-defined interface 1 using the cryptographic Hash one into block catenary system, transmit institute
Cryptographic Hash two is stated, to establish the association of the cryptographic Hash one and the cryptographic Hash two.
Step S406, locating template is disposed；
Wherein, user can dispose the locating template to block catenary system, and obtain the cryptographic Hash three of block catenary system return；
Wherein, user issues the association that the cryptographic Hash three and the cryptographic Hash one are established in trading instruction into block catenary system；
Wherein, the locating template is uploaded data center by settable data center, and the method that will acquire the locating template is compiled
Code is marked into after the two dimensional code in the ceramic surface, or the method for obtaining the locating template is deployed to block
Catenary system, and be associated with the cryptographic Hash one foundation.
Optionally, settable data center records process video of the ceramics in production side production, producer
The data such as biological characteristic upload data center, and the access link and cryptographic Hash for uploading data, production side are generated by data center
The access link of data center's return and cryptographic Hash are also registered in block as with the associated data information of the ceramic product
Chain.
Optionally, all side consistent with ceramic making side can be used by channel side in each link that the ceramics flow through
Method is registered and the associated channel information of ceramics in block catenary system.
In conclusion a kind of method for anti-counterfeit of ceramics described in one embodiment of the invention, production side or stream in ceramics
Lead to the sender of ceramics, represent the intelligent contract of ceramics to the deployment of block catenary system first, obtains the Kazakhstan that block catenary system returns
Uncommon value one, will be labeled in ceramic surface at two dimensional code, and by two dimensional code comprising the information coding including the cryptographic Hash one, then
The ceramic fingerprint one that the ceramics are extracted using the method that ceramic fingerprint is extracted in a kind of positioning, is then referred to the ceramics
Line one is deployed in block catenary system, is obtained the cryptographic Hash two that block catenary system returns, is then called connecing for the intelligent contract
Mouth one, transmits the cryptographic Hash two, to establish the association of the ceramics and the ceramic fingerprint one in block catenary system.
As shown in Figure 5 and Figure 6, An embodiment provides a kind of verification method of the method for anti-counterfeit of ceramics,
Detailed description are as follows for its specific method step.
Step S501, the cryptographic Hash one is obtained；
Wherein, user extracts cryptographic Hash one from the two dimensional code for be labeled in ceramic surface.
Step S502, block catenary system is accessed, ceramic fingerprint one is obtained；
Wherein, user accesses block catenary system with the cryptographic Hash one, is called using the cryptographic Hash one into block catenary system
The intelligence contract-defined interface 2 606 is obtained the cryptographic Hash two, then is obtained with the cryptographic Hash two comprising the ceramic fingerprint one
Trading instruction 607；
Wherein, the ceramic fingerprint one is parsed from the trading instruction 607.
Step S503, ceramic fingerprint two is extracted；
Wherein, user obtains ceramic fingerprint two using the method that ceramic fingerprint is extracted in a kind of positioning；
Wherein, user can obtain the locating template from block catenary system, or obtain the locating template from data center；
Wherein, the condition that user obtains ceramic fingerprint two should obtain the pottery with the production side of ceramics or the sender of circulation ceramics
Porcelain fingerprint one it is consistent.
Step S504, the identification comparison ceramic fingerprint one and ceramic fingerprint two；
Wherein, user realizes the anti-of ceramics by the consistency of the identification comparison ceramic fingerprint one and the ceramic fingerprint two
Puppet verifying.
In conclusion a kind of verification method of the method for anti-counterfeit of ceramics described in one embodiment of the invention, when needs are tested
When card ceramics, verifier accesses block catenary system first with the two dimensional code for being labeled in ceramic surface, obtains intelligent contract, then
The interface two for calling the intelligent contract, obtains the cryptographic Hash two, and described in being obtained with this and disposing in block catenary system
Ceramic fingerprint one, and ceramic fingerprint two is extracted using the method that ceramic fingerprint is extracted in a kind of positioning, then pass through identification
The consistency of the ceramic fingerprint one and the ceramic fingerprint two is compared to realize the fake certification of ceramics.
Technical solution provided by the present invention is described in detail above, for those of ordinary skill in the art,
Thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this theory
Bright book content should not be construed as limiting the invention.
Claims (10)
1. a kind of method that ceramic fingerprint is extracted in positioning, which is characterized in that including 1) use positioning camera one to scan ceramic surface,
Ceramics surface search and locating template be overlapped region, 2) with band amplify or microscopic function two Scan orientation template of camera
The region of positioning obtains ceramic surface micro-image.
2. a kind of method that ceramic fingerprint is extracted in the positioning as described in right 1, which is characterized in that also wrapped before the step 1)
Include the process for determining and obtaining the locating template.
3. a kind of method that ceramic fingerprint is extracted in the positioning as described in right 1, which is characterized in that also wrapped after the step 2
Include the process that abstract characteristics of image is extracted from the ceramic surface micro-image.
4. a kind of prevent comprising a kind of ceramics of the method for the ceramic fingerprint of positioning extraction as claimed in any one of claims 1 to 3
Fake method, which is characterized in that including 1) using the method that ceramic fingerprint is extracted in a kind of positioning ceramic fingerprint one is obtained,
2) the ceramic fingerprint one is deployed to block catenary system, and obtains the cryptographic Hash one of block catenary system return.
5. a kind of a kind of method for anti-counterfeit of ceramics as described in right 4, which is characterized in that further include marking the cryptographic Hash one
In the process of ceramic surface.
6. a kind of a kind of method for anti-counterfeit of ceramics as described in right 4, which is characterized in that in the step 1) and the step 2
Before or between or later, further include to block catenary system deployment represents ceramics intelligent contract, obtain block catenary system return
Cryptographic Hash two, by the cryptographic Hash two mark ceramic surface process.
7. a kind of a kind of method for anti-counterfeit of ceramics as described in right 4 and right 6, which is characterized in that further include to block linkwork
System publication trading instruction, establishes the associated process of the cryptographic Hash one and the cryptographic Hash two.
8. a kind of a kind of method for anti-counterfeit of ceramics as described in right 4, which is characterized in that further include to block catenary system or data
The process of center deployment locating template.
9. a kind of relative to a kind of described in any item anti-counterfeit authentication methods of the method for anti-counterfeit of ceramics of such as right 4~8, feature
It is, including, 1) from block catenary system obtain the ceramic fingerprint one, 2) using a kind of positioning extract ceramic fingerprint
The ceramic fingerprint two of method acquisition, 3) are carried out by consistency and identifies comparison for the ceramic fingerprint one and the ceramic fingerprint two.
10. a kind of anti-counterfeit authentication method of the ceramics as described in right 9, which is characterized in that the step 1) and the step 2
Sequence can overturn.
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| CN110399914B (en) * | 2019-07-18 | 2021-10-01 | 北京四维博大科技有限公司 | Ceramic fingerprint identification method and system |
| CN113269568A (en) * | 2021-05-25 | 2021-08-17 | 深圳市尊时科技有限公司 | Ceramic bubble anti-counterfeiting method |
| WO2022247491A1 (en) * | 2021-05-25 | 2022-12-01 | 深圳市尊时科技有限公司 | Ceramic bubble anti-counterfeiting method |
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