CN114997350A - Method and system for identifying authenticity of article - Google Patents
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- CN114997350A CN114997350A CN202210675884.5A CN202210675884A CN114997350A CN 114997350 A CN114997350 A CN 114997350A CN 202210675884 A CN202210675884 A CN 202210675884A CN 114997350 A CN114997350 A CN 114997350A
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- 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
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Abstract
The invention provides a method and a system for identifying the authenticity of an article, wherein the method comprises the steps of receiving coding information; generating a basic code according to the coding information; receiving an anti-counterfeiting level and a change rule; changing the basic code to obtain a conversion code corresponding to each grade in the anti-counterfeiting grade; superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code; an article anti-counterfeiting code is imparted on the article; acquiring a code element image of a characteristic article anti-counterfeiting code on an article to be identified; decoding the code element image to obtain a corresponding anti-counterfeiting level and a corresponding change rule; and identifying the article to be identified by utilizing the code element image. The method improves the anti-counterfeiting level of the article by superposing a plurality of conversion codes, improves the anti-counterfeiting effect, autonomously defines the anti-counterfeiting level on the basis of being compatible with a plurality of dot matrix code encoding and decoding rules and equipment, and is suitable for anti-counterfeiting requirements of different levels. For the middle and low level code element images, a conventional identifier can be used for identification; for high level symbol images, a special identifier may be used for discrimination.
Description
Technical Field
The invention belongs to the technical field of digital anti-counterfeiting, and particularly relates to a method and a system for identifying authenticity of an article.
Background
The traditional anti-counterfeiting codes mainly comprise one-dimensional codes, two-dimensional codes, Data Matrix, Vericode, MaxiCode and the like. However, the above anti-counterfeiting code generally has the following defects: if the amount of stored information is small, the anti-counterfeiting code can be copied by means of photographing, scanning and the like, and the anti-counterfeiting effect is poor. If the amount of stored information is large, although the anti-counterfeiting effect of the anti-counterfeiting code can be improved, the problems of high identification cost, high coding cost and the like exist.
Application No. 202110928117.6 discloses a multispectral-multispectral composite anti-counterfeiting two-dimensional code based on CMYK common ink, comprising: the method comprises the steps that a two-dimensional code presented in a clear code form and three two-dimensional codes hidden in a secret code form are combined into a whole through three different information modulation modes, and the multispectral-multispectral composite anti-counterfeiting two-dimensional code is generated. However, the identification of the two-dimensional code of the password depends on an infrared spectrometer, so that the identification threshold is improved; special ink is required to be used, so that the implementation cost of code assignment is increased; the mode of light and shade combination is adopted, the anti-counterfeiting grade, the implementation link and the identification link are fixed, and the selectivity is lacked in practice; the two-dimensional code and the dot matrix code only need to be processed on color and printing ink, and the anti-counterfeiting difficulty is not enough.
Application number 202111566313.X discloses a generation method of a novel anti-counterfeiting two-dimensional code, which comprises the steps of encoding hidden data after a terminator of an original two-dimensional code data block to construct a new two-dimensional code data block, wherein the hidden data comprises encoded data corresponding to an anti-counterfeiting means; and generating the two-dimensional code according to the new two-dimensional code data block. The method uses the redundancy check data segment to form hidden data, and replaces the code elements with set colors such as CMYK:20,60,80,60, CMYK:60,80,0,40 or implant miniature words, although the method has diversity, on a two-dimensional code element with a larger size, the method is difficult to resist the copying of high-definition scanning.
In the prior art, a part of anti-counterfeiting codes are realized by adopting a physical anti-counterfeiting technology, and are anti-counterfeiting by adopting textures, lasers, reactive color change, windowing, ultraviolet rays, magnetism and the like, and the identification needs to be realized by using a special instrument, so that the identification implementation education cost is high, the possibility of wrong identification is difficult, and the anti-counterfeiting codes are difficult to popularize in common scenes and the public.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for identifying the authenticity of an article, which adopt a digital anti-counterfeiting technology, have customizable anti-counterfeiting level, good anti-counterfeiting effect, low identification cost and good convenience, can be applied to the existing two-dimensional codes, DM codes and small program codes, can be realized on the large scale of 1 meter such as buildings and advertisement marks, and can also be realized on the sizes of as small as centimeters and millimeters, have selectable identification confidence level, do not influence the acquisition of the information stored in the original code, and carry out autonomous definition of the anti-counterfeiting level on the basis of being compatible with various dot matrix code type coding and decoding rules and equipment, thereby promoting the reliability improvement of informatization and the Internet of things.
In a first aspect, a method for authenticating an article includes:
receiving the coded information;
generating a basic code according to the coding information;
receiving the anti-counterfeiting level and the change rule bound with the coding information;
changing the basic codes according to the change rules respectively to obtain conversion codes corresponding to each grade in the anti-counterfeiting grade;
superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code; the article anti-counterfeiting code is used for being endowed on the article;
acquiring a code element image of a characteristic article anti-counterfeiting code on an article to be identified;
decoding the code element image to obtain a corresponding anti-counterfeiting level and a corresponding change rule;
and identifying the article to be identified by utilizing the code element image.
Further, the base code includes a code encoded by the encoded information and including a plurality of symbols.
Furthermore, each anti-counterfeiting level corresponds to one change rule.
Further, the change rules include, but are not limited to, changing color, superimposing, shifting, deforming shape, changing size or increasing or decreasing the code elements in the basic code, assigning codes by using special ink, or assigning codes by using a laser etching device or changing color by heating.
Further, the identification of the article to be identified by using the code element image specifically includes:
calculating the confidence of the code element image;
and identifying the authenticity of the object to be identified by using the confidence coefficient.
Further, the calculating the confidence of the symbol image specifically includes:
decoding the code element image, and determining a confidence coefficient according to a decoding result; the decoding result comprises whether at least one authentication code is obtained by decoding; the authentication code characterizes a base code, a translation code, a combination of the base code and at least one translation code, or a combination of a plurality of translation codes.
Further, the calculating the confidence of the symbol image specifically includes:
a confidence level is determined based on changes in one or more discrimination codes in the symbol image.
Further, the change in the authentication code includes, but is not limited to, at least one of:
the distance between any two identification codes, the color of the identification codes, the shape of the identification codes, the size of the identification codes, the ink height of the identification codes and the laser etching depth of the identification codes.
Further, determining the reference value for the change of the authentication code includes: standard or practice values;
the standard value is determined by a basic code and/or a conversion code; the practical value is determined by the symbol image collected by the history or the symbol image of the same type and batch.
In a second aspect, an article authentication system includes:
an article anti-counterfeiting code generator: the device is used for receiving the coding information and generating a basic code according to the coding information; receiving an anti-counterfeiting grade; respectively changing the basic codes to obtain a conversion code corresponding to each grade in the anti-counterfeiting grade; superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code;
a code endowing device: for imparting an article anti-counterfeiting code onto the article;
the recognizer: the code element image is used for acquiring the anti-counterfeiting code of the characteristic article on the article to be identified; and identifying the article to be identified by utilizing the code element image.
According to the technical scheme, the method and the system for identifying the authenticity of the article have the following advantages:
1. according to the method, after the basic code is changed for many times, the obtained conversion code and the basic code are superposed and then coded, so that the anti-counterfeiting grade of the article can be improved by superposing a plurality of conversion codes, and the anti-counterfeiting effect is improved.
2. The method can automatically customize the anti-counterfeiting grade under the condition of hardly increasing the implementation cost, is suitable for anti-counterfeiting requirements of different grades, and can greatly promote the informatization and the reliability improvement of the Internet of things.
3. The method can be used in combination with the existing mainstream two-dimensional codes, DM codes, small program codes and the like, accords with the existing production and living habits, and has a wide application range.
4. The anti-counterfeiting code of the article obtained by the method is suitable for electronic edition and real objects.
5. In the method, a conventional identifier can be used for identification aiming at middle and low-level code element images during identification; for the high-level code element image, the identification can be carried out by using a special identifier, for example, the special identifier comprises an identifier comprising a microscope, a spectrum detection function and a depth detection function, the identification method is simple, and the identification cost is low.
6. The method can automatically customize the anti-counterfeiting grade according to the requirement, and has the advantages of convenience and rapidness in implementation, high efficiency in identification and low overall cost.
7. The method can be realized on the large scale of 1 meter such as buildings, advertisement signs and the like, and can also be realized on the sizes as small as centimeters and millimeters. The confidence coefficient for identifying the authenticity is optional, and the information stored in the original code is not influenced.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a flowchart of the method for authenticating an article according to this embodiment.
Fig. 2 is a schematic diagram of a two-dimensional code provided in this embodiment.
Fig. 3 is a schematic diagram of a basic code provided in this embodiment.
Fig. 4 is a schematic diagram of symbol reduction in the two-dimensional code provided in this embodiment.
Fig. 5 shows the deformed shape of the symbol according to this embodiment.
Fig. 6 shows the translation code obtained after the transformation provided in this embodiment.
Fig. 7 is a conversion code obtained after the information points are deleted from the symbol provided in this embodiment.
Fig. 8 is a conversion code obtained after the information point is deleted from the symbol provided in this embodiment.
Fig. 9 is a flowchart of a method for authenticating an article according to this embodiment.
Fig. 10 is a schematic view of the article anti-counterfeit code provided in this embodiment.
Fig. 11 is a schematic diagram of information points in a space occupation in the article anti-counterfeit code provided by the embodiment.
Fig. 12 is a schematic diagram of an article authentication system according to this embodiment.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Example (b):
a method for authenticating an article, see fig. 1, comprising:
s1: receiving the coded information;
s2: generating a basic code according to the coding information;
s3: receiving the anti-counterfeiting level and the change rule bound with the coding information;
s4: changing the basic codes according to the change rules respectively to obtain conversion codes corresponding to each grade in the anti-counterfeiting grade;
s5: superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code;
s6: generating an electronic version of the anti-counterfeiting code of the article or implementing coding on the article;
s7: collecting and storing a reference value for determining the change of the identification code;
s8: acquiring a code element image of a characteristic article anti-counterfeiting code on an article to be identified;
s9: decoding the code element image to obtain information stored by the basic code and obtain the corresponding anti-counterfeiting level and the change rule; step S9 can obtain the information stored in the basic code to realize decoding regardless of the confidence of the authenticity.
S10: and carrying out confidence degree identification on the article to be identified by utilizing the code element image and obtaining corresponding additional information. For example, when the symbol image features meet a preset confidence level, (extra) additional information bound to the anti-counterfeiting level and the change rule is fed back.
In this embodiment, the encoded information may include anti-counterfeiting information for the article. For example, the security information may include the manufacturer of the article, the date of manufacture, the expiration date, etc. The encoded information may be composed of words, numbers, letters, symbols, etc., for example, the encoded information may be 20220301 abc-0019. After the method obtains the coding information, a basic code is generated according to the coding information. Wherein the base code comprises a code encoded with the encoded information and comprising a plurality of symbols. The basic code may be a two-dimensional code, a DM code, a dot-matrix code, etc. in a dot matrix form, for example, if the basic code is the two-dimensional code of fig. 2, a black square represents a code element, and stores binary information (dot) 1; a white square represents a symbol, storing binary information (dot) 0; one code element has one occupying part, and the occupying part is the theoretical maximum area of the information point under the code system. The basic code may be a code obtained by reducing the code elements of the above-described dot code, and for example, the basic code shown in fig. 3 is obtained by reducing the code elements of the two-dimensional code of fig. 2 by a ratio of 25%. Referring to fig. 4, then for 2 symbols of fig. 2 whose center spacing is 1 unit length, when scaled down by 25%, the center spacing of the two symbols is still 1 unit length, but the minimum theoretical spacing of the symbols (the minimum of the two symbol edge distances) changes from 0 unit length to 0.75 unit length.
In this embodiment, the method can flexibly set the anti-counterfeiting level (and flexibly process the implementation level and the authentication level according to the requirement) and the change rule for each batch of articles, so that the anti-counterfeiting levels of different articles are different. For example, the anti-counterfeiting grade can be set to be three-grade, six-grade, nine-grade and the like, the higher the anti-counterfeiting grade is, the better the anti-counterfeiting effect is, and the obtained article anti-counterfeiting code is less prone to being copied. The variation mode of the basic code can be determined by the variation rule. After the anti-counterfeiting grade of the article is confirmed, the basic codes are changed respectively to obtain the conversion codes corresponding to each grade in the anti-counterfeiting grade, so that after the change, each grade in the anti-counterfeiting grade corresponds to one conversion code, and the conversion codes corresponding to different grades can be the same or different. For example, if the anti-counterfeiting level is six levels, the conversion codes corresponding to the six levels are obtained respectively. If the anti-counterfeiting grade is nine grades, conversion codes corresponding to the nine grades are obtained respectively.
In this embodiment, after the method obtains the conversion code, all the conversion codes and the basic code are superimposed to obtain the article anti-counterfeit code. When the method is used for superposition, the translation codes can be respectively superposed near the basic codes, for example, the translation codes are superposed in the directions of upper, lower, left, right, left upper, left lower, right upper or right lower of the basic codes. In specific implementation, when performing superposition, it should be ensured that a code element corresponding to the same information point in the translation code is superposed in the place occupied by the information point in the basic code. The article anti-counterfeiting code is used for being endowed on an article, wherein the coding mode comprises digital printing, code spraying, laser, thermal transfer printing, silk printing, article anti-counterfeiting code added with an electronic plate and the like. The article is suitable for electronic, various material surfaces and various devices.
In this embodiment, after the method generates the anti-counterfeit code of the article, an electronic version of the anti-counterfeit code of the article may be generated, or a code may be applied to the article. The method also collects and stores a reference value for determining the change of the identification code, and is used for subsequently judging whether the identification code changes.
In this embodiment, when the method performs authentication, a code element image for characterizing an article anti-counterfeiting code on an article to be authenticated is obtained first, and the code element image is decoded to obtain a corresponding anti-counterfeiting level and a corresponding change rule. For example, if the article security code is printed or laser etched on the article in a conventional manner, the code element image can be identified using a conventional identifier (e.g., cell phone, microscope). If a certain conversion code is given on an article through special ink and has a stealth function, a code element image can be acquired by adopting a special device. The method identifies the article to be identified by using the code element image, thereby judging whether the article to be identified is a genuine article or a counterfeit article.
The method has the following advantages:
1. according to the method, after the basic code is changed for many times, the obtained conversion code and the basic code are overlapped and then coded, so that the anti-counterfeiting grade of the article can be improved by overlapping the conversion codes, and the anti-counterfeiting effect is improved.
2. The method can automatically customize the anti-counterfeiting grade under the condition of hardly increasing the implementation cost, is suitable for anti-counterfeiting requirements of different grades, and can greatly promote the informatization and the reliability improvement of the Internet of things.
3. The method can be used in combination with the existing mainstream two-dimensional codes, DM codes, small program codes and the like, accords with the existing production and living habits, and has a wide application range.
4. The anti-counterfeiting code of the article obtained by the method is suitable for electronic edition and real objects.
5. In the method, a conventional identifier can be used for identification aiming at middle and low-level code element images during identification; for the high-level code element image, the special identifier can be used for identification, for example, the special identifier comprises a microscope, a spectrum detection function and a depth detection function, the identification method is simple, and the identification cost is low.
6. The method can automatically customize the anti-counterfeiting grade according to the requirement, and has the advantages of convenience and rapidness in implementation, high efficiency in identification and low overall cost.
7. The method can be realized on the large scale of 1 meter such as buildings, advertisement signs and the like, and can also be realized on the size of as small as centimeters and millimeters. The confidence of authenticity identification is optional, and the information stored in the original code is not influenced.
Further, in some embodiments, each of the levels of security corresponds to a variation rule.
In this embodiment, after determining the anti-counterfeit level of the article, the method receives the change rule corresponding to each level. For example, if the security level of the article is six, then the change rules of six levels need to be received. And under each grade, changing the basic code according to the change rule corresponding to the grade to obtain the conversion code corresponding to the grade. Wherein the variation rules of each grade can be the same or different.
Further, in some embodiments, the variation rules include, but are not limited to, color shifting, superimposing, shifting, shape deforming, size changing or increasing or decreasing the symbols in the base code, encoding with special ink, or encoding with a laser etching device or color changing with heat.
In this embodiment, the change rule includes the following:
1) and (5) changing color. Normally, for the basic code shown in fig. 3, the color of the basic code is black, and one variation rule provided by the method is to change the color of the symbols in the basic code, for example, to C100/cyan, Y100/yellow, M100/magenta, etc. Wherein the color change rule further comprises changing saturation and brightness.
2) And (4) displacing. The method for performing displacement change on the basic code can comprise the following steps: all symbols in the basic code are simultaneously shifted by the same distance towards the same direction, wherein the shift distance can be an absolute distance or a relative distance from the basic code. After the basic code is subjected to displacement change, the method ensures that each code element in the obtained conversion code is positioned in the occupation of each code element in the basic code.
3) And (6) superposing. The method for performing superposition change on the basic code may include: superimposing a designated image, designating a translation code, or other code.
4) The shape is deformed. The method for shape-deforming the basic code may include: the shape of each symbol in the basic code is transformed into a specified shape, for example, the shape of the symbol is changed into a triangle, a star or other special shapes, and the shape of the symbol can also be changed into a logo, a number and the like. For example, the shapes of the symbols in the basic code of fig. 3 are transformed into the shapes of fig. 5, thereby obtaining the transformed codes shown in fig. 6.
5) The size varies. The method for changing the size of the basic code may include: the size of each symbol in the base code is scaled, for example, by 50% or by 50% of the size of each symbol in the base code.
6) Increase and decrease. The method for increasing or decreasing the basic code may include: the basic code is divided into m × n blocks, and symbols are added or deleted in a specific block. For example, the basic code of fig. 3 is divided into 3 × 3 blocks, i.e., #1, #2, #3, #4, #5 … # 9. The translation code of fig. 7 is obtained by deleting a plurality of information points at the #6 block of the basic code of fig. 3, wherein the information points indicated by arrows in fig. 7 are the deleted information points. The translation code of fig. 8 is obtained by adding a plurality of information points at the #8 block in the basic code of fig. 3, wherein the information points indicated by arrows in fig. 8 are the added information points.
7) Special ink is used for coding. The method can also carry out invisible treatment on the basic code or a certain conversion code at a certain level in the anti-counterfeiting level, namely, the code which needs to be subjected to invisible treatment is assigned with a code by adopting special ink.
8) And (3) coding or heating color changing is carried out by adopting laser etching equipment. The method can also adopt laser etching equipment to assign codes to the basic codes or a certain conversion code or change colors by heating at a certain level in the anti-counterfeiting level, so that the color, the shape and the etching depth can be identified according to the laser etching depth during identification.
Further, in some embodiments, referring to fig. 9, the identifying the to-be-identified item by using the symbol image specifically includes:
s11: calculating the confidence of the code element image;
s12: and identifying the authenticity of the object to be identified by using the confidence coefficient.
In this embodiment, the method may identify the authenticity of the article to be identified by calculating the confidence level of the symbol image, where the confidence level of the symbol image and the possibility that the article to be identified is a genuine article are in a positive correlation. For example, the higher the confidence of the symbol image, the higher the possibility that the article to be authenticated is genuine; the lower the confidence of the symbol image, the lower the likelihood that the article to be authenticated is genuine. The method provides the following two confidence calculation methods:
1) and decoding the code element image, and determining the confidence coefficient according to the decoding result. The decoding of the symbol image includes whether at least one authentication code is extracted, the authentication code characterizing a base code, a translation code, a combination of the base code and at least one translation code, or a combination of a plurality of translation codes. And when the code element image can successfully extract the identification code, the decoding result is successful, otherwise, the decoding result is failed, and when the decoding result is successful, the confidence coefficient is high, and when the decoding result is failed, the confidence coefficient is low. The method can determine the confidence level according to the decoding result of the code element image independently, thereby determining the authenticity of the article to be identified.
2) When the code element image is decoded to obtain the identification codes, the confidence coefficient is determined according to the change of one or more identification codes. After the code element image is decoded to obtain the identification code, the characteristics in the identification code can be extracted, and the change of the identification code is determined according to the characteristics, so that the confidence coefficient is obtained. If someone acquires the article anti-counterfeiting code on the genuine article by scanning or copying and the like and reprints the article anti-counterfeiting code on the counterfeit article, the details in the code element image are increased or decreased after the code element image is scanned, copied, printed and the like, so that the change of the identification code in the code element image acquired from the counterfeit article is different from the change of the identification code in the code element image acquired from the genuine article. The method can also determine the confidence level through the change of the identification code, and if the consistency between the change of the identification code and the change in the anti-counterfeiting code of the genuine article is higher, the obtained confidence level is higher. The method can determine the confidence degree according to the decoding result independently, and also can determine the confidence degree according to the change of the identification code after the identification code is obtained by decoding.
Further, in some embodiments, the change in the authentication code includes, but is not limited to, at least one of:
the distance between any two identification codes, the color of the identification codes, the shape of the identification codes, the size of the identification codes, the ink height of the identification codes and the laser etching depth of the identification codes.
In this embodiment, the confidence may be a score, and the larger the score, the higher the confidence, and the smaller the score, the lower the confidence. The method can make a plurality of check items according to the change rule in the anti-counterfeiting code of the article, and when the change of the identification code does not meet a certain check item, the confidence degree deducts points, such as 5 points, 10 points and the like. When the change of the authentication code satisfies a certain check item, the confidence score is, for example, 5 points, 10 points, or the like. The method can determine the confidence level according to the score condition or the deduction condition of all or part of the checking items, for example, if the change of the identification code satisfies the checking item, the obtained confidence level score is higher if the score of one checking item is set to be higher, so that the article can be determined to be a genuine article by the checking item alone. For example, if the confidence is greater than or equal to 50, the article to be identified is determined to be a genuine article, otherwise, the article to be identified is a counterfeit article. If the code element image is successfully decoded, the score is 50, and if the code element image of the article to be identified can be successfully decoded, the article to be identified is judged to be a genuine article. The method can determine the confidence level according to the decoding result or the identification result of one or more identification codes, and can improve the fault tolerance of the identification of the anti-counterfeiting codes of the articles. The method can identify the authenticity of the article only according to part or all of the identification codes, can also identify the authenticity of the article according to part or all of the characteristics of the identification codes, has strong identification capability, high extraction speed and strong anti-interference capability, and can realize multi-dimensional identification.
In this embodiment, the method may extract features of the symbol image according to the requirement of the anti-counterfeiting level, and determine the change of the identification code according to the extracted features, where the features of the image include one or more of: geometric features (position and orientation, perimeter, area, major and minor axes, distance (euclidean distance, block distance, checkerboard distance)), shape features (rectangularity, circularity, invariant moment, eccentricity, polygon description, curve description), magnitude features (moment, projection), histogram features (mean, variance, energy, entropy, L1 norm, etc.), color features (color histogram, color moment), local binary pattern features (LBP).
Assuming that the article anti-counterfeiting code is as shown in fig. 10, fig. 11 is the information in the placeholder of each symbol in fig. 10. In fig. 11, an information point a is a symbol of the base code (the symbol is obtained by symbol reduction in the two-dimensional code), an information point B1 is a symbol obtained by superimposing the information point a after changing the color to C100/cyan, and the change in the color of the symbol in fig. 11 can be obtained by a gray scale value or a gray scale ratio. The information point B4 is a symbol obtained by enlarging the information point a and superimposing it after changing its color to Y100/yellow, the information point B2 is a symbol obtained by superimposing it after reducing the area of the information point a, and the information point B3 is a symbol obtained by superimposing it after changing its shape to triangle and changing its color to M100/magenta.
The method for determining a change in an authentication code includes:
1) identification for discoloration. The method can separate the identification codes after color change, such as the identification codes of C100/cyan, Y100/yellow and M100/magenta, through different color channels. When the identification code under each color channel is extracted, the method can judge the change of the identification code on the color through the color of the identification code, the average gray value of the identification code or the gray ratio of the identification code. For example, it is possible to determine that the information point B1, the information point B4, and the information point B3 have changed color by color, average gradation value, or gradation ratio, and obtain the changed color.
2) Discrimination against displacement. The method can acquire each occupied information point in the identification code, and determine the displacement change of the identification code according to the distance of each information point (including the distance between the center points of the code elements or the minimum theoretical distance of the code elements). Assuming that the basic code of fig. 3 is changed to obtain the article anti-counterfeiting code of fig. 10, it can be seen from fig. 11 that: the side length of the information point A becomes 0.25 unit length and the area becomes 0.25 2 The minimum theoretical spacing is 0.75 unit length per square unit, and the spacing between the center points of the symbols is 1 unit length. The side length of the information point B1 became 0.25 unit and the area was 0.25 2 The minimum theoretical spacing is 0.75 unit length per square unit, and the spacing between the center points of the symbols is 1 unit length. The side length of the information point B2 became 0.125 unit and the area was 0.125 2 The minimum theoretical spacing is 0.875 units in length per square unit, and the spacing between the center points of the symbols is 1 unit in length. The information point B3 becomes an isosceles triangle with a waist of 0.25 unit length and an area of 0.25 2 2 square units, the spacing between the center points of the symbols is 1 unit length. The side length of the information point B4 became 0.3 unit and the area was 0.3 2 The minimum theoretical spacing is 0.7 units per square unit, and the spacing between the center points of the symbols is 1 unit long.
The distance between each information point is as follows: the minimum theoretical distance between the information point A and the information point B1 is 0 unit length, and the distance between the center points of the code elementsIs composed of
Unit length. The minimum theoretical distance between the information point A and the information point B2 is 0.125 units in length, and the distance between the center points of the code elements is 0.25+0.125/2 units. The minimum theoretical separation between information point A and information point B3 is
Units of elements having a spacing between the center points of the elements
Unit of and
between units. The minimum theoretical separation of information point a from information point B4 is 0 units long. The minimum theoretical separation of information point B1 from information point B4 is 0.125 units in length. Therefore, the method can judge whether the information points are subjected to the specified displacement or not through the space between the information points.
3) The method is used for identifying shape deformation and size deformation. The method can determine whether the symbol is subjected to shape deformation or size deformation by extracting the size of the pixel unit occupied by the symbol. For example, if the area becomes smaller after the symbol is reduced or the shape is changed, the pixel unit occupied by the symbol becomes smaller. If the area becomes large after the symbol is enlarged or the shape is changed, the pixel unit occupied by the symbol becomes large.
4) Identification for increase or decrease. If a plurality of information points are deleted or added in the basic code, when the identification code is identified, only the judgment of whether the information points exist or lack at the specified position in the identification code is needed, for example, the judgment of whether a plurality of information points are lacked at the position of the identification code # 6 and the judgment of whether a plurality of information points exist at the position of the identification code # 8.
7) The method aims at adopting special ink to carry out coding identification. In the process of changing the basic code, if special ink is used for assigning codes, whether a certain identification code can be successfully identified by adopting special equipment can be judged. For example, whether the identification code is assigned by using special ink is judged according to the ink height of the identification code.
8) The method aims at the identification of code assignment or heating color change by adopting laser etching equipment. In the method, in the process of changing the basic code, if the laser etching equipment is adopted for code assigning or heating color changing, whether the identification code is subjected to code assigning or heating color changing by the laser etching equipment can be judged according to the laser etching depth of the identification code.
Further, in some embodiments, determining the reference value for the change in the authentication code comprises: standard or practice values;
the standard value is determined by the basic code and/or the conversion code; the practical value is determined by the symbol image collected by history or the symbol image of the same type and batch after marking.
In this embodiment, when determining the change of the authentication code, the method may provide a reference value for each change, then obtain an actual value of the authentication code, and compare the actual value with the reference value, thereby determining the change of the authentication code. The reference values may include an average grayscale reference value and a grayscale ratio reference value for determining a color, a pitch reference value for determining a pitch, a pixel unit reference value occupied by a deformed symbol, an ink height reference value for determining an ink height, and a laser etching depth reference value for determining a laser etching depth. The reference values include two types: 1) the standard value determined by the basic code and/or the conversion code, i.e. the reference code, can be determined from the basic code and/or the conversion code of the electronic version. 2) Since the original code (basic code and/or conversion code) of the electronic edition is printed on different materials, the characteristics (such as spacing, size, gray value and the like) of the code elements of the electronic edition can be different, and therefore the method can also determine practical values through historically collected code element images or marked similar code element images in the same batch. The marking of the code element image comprises information such as the category, batch, anti-counterfeiting level, characteristics and the like of the anti-counterfeiting code of the marked article, for example, the code element image printed on the plastic package is collected, and the practical value printed on the plastic package is determined according to the characteristics of the code element image. It is also possible to collect images of the code elements printed on the rubber and to determine the actual values printed on the rubber on the basis of their characteristics. It is also possible to collect the same code element image printed on various materials and determine the practical value printed on the rubber based on its characteristics.
An article authentication system, see fig. 12, comprising:
article anti-counterfeiting code generator 1: the base code is used for receiving the coding information and generating a base code according to the coding information; receiving the anti-counterfeiting level and the change rule bound with the coding information; changing the basic codes according to the change rules respectively to obtain conversion codes corresponding to each grade in the anti-counterfeiting grade; superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code;
the code assigning device 2: for imparting an article anti-counterfeiting code onto the article;
the identifier 3: the code element image is used for acquiring the anti-counterfeiting code of the characteristic article on the article to be identified; decoding the code element image to obtain a corresponding anti-counterfeiting level and a corresponding change rule; and identifying the article to be identified by utilizing the code element image.
In this embodiment, the recognizer performs two steps: a symbol image is acquired and discriminated. Because the anti-counterfeiting grades of the anti-counterfeiting codes of the articles on different articles are different, the adopted identifiers are different or the acquisition accuracy of the identifiers is different for the articles with different anti-counterfeiting grades. For example, for some symbol images with high anti-counterfeiting level or texture level (symbol images with a size of less than 30 micrometers, for example, symbol images with a size of 5 micrometers or 10 micrometers and a height of 1 micrometer or 0.5 micrometer), a general mobile phone device cannot be directly acquired, and needs to be identified by an identifier with higher acquisition precision.
Further, in some embodiments, the base code comprises a code encoded with the encoded information that includes a plurality of symbols.
Further, in some embodiments, each of the levels of security corresponds to a change rule.
Further, in some embodiments, the variation rules include, but are not limited to, changing color, superimposing, shifting, deforming, changing size or increasing or decreasing the symbols in the base code, assigning codes with special ink, or assigning codes with a laser etching device or changing color by heating.
Further, in some embodiments, the identifier 3 is specifically configured to:
calculating the confidence of the code element image;
and identifying the authenticity of the object to be identified by using the confidence coefficient.
Further, in some embodiments, the identifier 3 is specifically configured to:
decoding the code element image, and determining a confidence coefficient according to a decoding result; the decoding result comprises whether at least one authentication code is obtained by decoding; the authentication code characterizes a base code, a translation code, a combination of the base code and at least one translation code, or a combination of a plurality of translation codes.
Further, in some embodiments, the identifier 3 is specifically configured to:
a confidence level is determined based on changes in one or more discrimination codes in the symbol image.
Further, in some embodiments, the change in the authentication code includes, but is not limited to, at least one of:
the distance between any two identification codes, the color of the identification codes, the shape of the identification codes, the size of the identification codes, the ink height of the identification codes and the laser etching depth of the identification codes.
Further, in some embodiments, determining the reference value for the change in the authentication code comprises: standard or practice values;
the standard value is determined by a basic code and/or a conversion code; the practical value is determined by the symbol image collected by the history or the symbol image of the same type and batch.
For the sake of brief description, the system provided by the embodiment of the present invention may refer to the corresponding content in the foregoing embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. An article authentication method, comprising:
receiving the coded information;
generating a basic code according to the coding information;
receiving the anti-counterfeiting level and the change rule bound with the coding information;
changing the basic codes according to change rules respectively to obtain conversion codes corresponding to each grade in the anti-counterfeiting grades;
superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code; the article anti-counterfeiting code is used for being endowed on the article;
acquiring a code element image of a characteristic article anti-counterfeiting code on an article to be identified;
decoding the code element image to obtain a corresponding anti-counterfeiting level and a change rule;
and identifying the article to be identified by using the code element image.
2. The method for authenticating an article according to claim 1,
the base code includes a code encoded from the encoded information and including a plurality of symbols.
3. The method for authenticating an article according to claim 2,
each grade in the anti-counterfeiting grade corresponds to one change rule.
4. The method for authenticating an article according to claim 3,
the change rule includes, but is not limited to, changing color, superimposing, displacing, deforming in shape, changing in size or increasing or decreasing the code elements in the basic code, assigning codes by using special ink, or assigning codes by using laser etching equipment or changing color by heating.
5. The method for authenticating an article according to claim 1, wherein the authenticating the article to be authenticated using the symbol image specifically includes:
calculating a confidence of the symbol image;
and identifying the authenticity of the article to be identified by using the confidence coefficient.
6. The method for authenticating an article according to claim 5, wherein the calculating the confidence level of the symbol image specifically includes:
decoding the code element image, and determining the confidence coefficient according to a decoding result; the decoding result comprises whether at least one authentication code is obtained by decoding; the authenticator characterizes a base code, an invert code, a combination of a base code and at least one invert code, or a combination of multiple invert codes.
7. The method for authenticating an article according to claim 6, wherein the calculating the confidence level of the symbol image specifically includes:
determining the confidence level based on changes in one or more of the authentication codes in the symbol image.
8. The method for authenticating an article according to claim 7,
the change in the authentication code includes, but is not limited to, at least one of:
the distance between any two identification codes, the color of the identification codes, the shape of the identification codes, the size of the identification codes, the ink height of the identification codes and the laser etching depth of the identification codes.
9. The method for authenticating an article according to claim 8,
determining the reference value of the change of the authentication code includes: standard or practice values;
the standard value is determined by the basic code and/or the conversion code; the practical value is determined by the symbol image collected historically or the identified same-class and same-batch symbol images.
10. An article authentication system, comprising:
the article anti-counterfeiting code generator: the device is used for receiving coding information and generating a basic code according to the coding information; receiving an anti-counterfeiting grade; respectively changing the basic codes to obtain conversion codes corresponding to each grade in the anti-counterfeiting grade; superposing all the conversion codes and the basic codes to obtain an article anti-counterfeiting code;
a code endowing device: for imparting the article anti-counterfeiting code onto an article;
the recognizer: the code element image is used for acquiring the anti-counterfeiting code of the characteristic article on the article to be identified; and identifying the article to be identified by using the code element image.
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