CN113762446B - Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code based on CMYK common ink - Google Patents
Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code based on CMYK common ink Download PDFInfo
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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
- G06K19/06009—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 optically detectable marking
- G06K19/06037—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 optically detectable marking multi-dimensional coding
Abstract
The invention belongs to the field of printing anti-counterfeiting, and particularly relates to a multi-color spectrum-multi-spectrum compound anti-counterfeiting two-dimensional code based on CMYK common ink. The multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code comprises: and the two-dimensional code presented in the form of an open code and three two-dimensional codes hidden in the two-dimensional code in the form of a secret code are combined into a whole through three different information modulation modes, so that the multispectral-polychromatic spectrum composite anti-counterfeiting two-dimensional code is generated. The multi-chromatographic-multi-spectral compound anti-counterfeiting two-dimensional code technology combines multiple anti-counterfeiting technologies, has good multi-functional compatibility and extremely strong anti-copying characteristics, and has important application value in the fields of anti-counterfeiting traceability, brand protection, commodity marketing and the like.
Description
Technical Field
The invention belongs to the field of printing anti-counterfeiting, and particularly relates to a multi-color spectrum-multi-spectrum compound anti-counterfeiting two-dimensional code based on CMYK common ink.
Background
According to different anti-counterfeiting requirements of products, anti-counterfeiting technologies can be classified into a plurality of grades: the user can simply and directly identify the first-line anti-counterfeiting technology and the second-line and third-line anti-counterfeiting technology by using special equipment. The two-dimensional code anti-counterfeiting is an important problem which the two-dimensional code must solve in the actual use process, and meanwhile, a plurality of two-dimensional codes are required to be used in order to improve the information storage capacity of the two-dimensional code and meet different use scenes. At present, the reading equipment and coding and decoding software of the common black-and-white two-dimension codes are popularized in a large area, so that a novel two-dimension code anti-counterfeiting technology needs to be developed, a plurality of two-dimension codes can be compounded together, multiple anti-counterfeiting characteristics are increased, and the direct reading of the compound two-dimension codes can be realized by using the popularized code scanning equipment.
CN107423796a discloses a multispectral invisible anti-counterfeiting mark, which comprises an infrared absorption anti-counterfeiting pattern area made of infrared absorption ink, a macroscopic area made of common ink, and an ultraviolet excitation anti-counterfeiting pattern area made of ultraviolet excitation ink. Although the ink has multiple anti-counterfeiting capability, special ink such as infrared absorption ink, ultraviolet excitation ink and the like is needed, and the printing cost is increased and the generation process is more severely required.
CN104657698A discloses a color two-dimensional code encoding and decoding method capable of bearing a plurality of black and white two-dimensional codes. According to the RGB three-primary-color principle, a plurality of colors with large average color difference value are selected as preselected coding colors of the color two-dimensional code, and are sequentially arranged, and each color corresponds to an arrangement sequence number. The color coding and decoding method is compatible with the black-and-white two-dimension code information coding and decoding standard, but needs to manufacture a plug-in to upgrade the software of the universal black-and-white two-dimension code to realize the reading function.
Disclosure of Invention
The invention aims to realize the multi-code unification and multi-anti-counterfeiting purposes of two-dimension codes, provides a multi-color spectrum-multi-spectrum compound anti-counterfeiting two-dimension code technology based on CMYK common ink, solves the technical problems that the existing color two-dimension codes and compound two-dimension codes cannot be directly read, the anti-counterfeiting technology is single and the like aiming at the security problem and the actual application requirement of the two-dimension codes in the anti-counterfeiting aspect, and has the advantages of low cost, convenience in reading, good anti-counterfeiting performance and the like.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a method for generating a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code based on CMYK common ink, which comprises the following steps:
(1) Generation of clear and combination images
Inputting text information, audio and video or web page network link information into two-dimension code generating software according to the demands of article coding and anti-counterfeiting, and respectively generating a clear code two-dimension code image and a secret code two-dimension code image;
(2) Color coding
Based on a color encoder, taking a plain code and a first repeated password as input variables, wherein the plain code and the first repeated password are common binary images, a dark color module is represented by 0, and a light color module is represented by 1; RGB, CMYK, or l×ab is used as an output variable of the encoding table, and 0 or 1 is used to indicate whether each color component is used. Encoding and compositing the plain code and the first heavy secret code according to the defined color and gray information to generate a first heavy polychromatic spectrum composite two-dimensional code;
(3) Spatial information modulation
The anti-counterfeiting information is subjected to reliability information coding to obtain an airspace anti-counterfeiting dot matrix image based on the minimum printing ink point, the airspace dot matrix data is loaded into the first heavy polychromatic compound two-dimensional code by taking the first heavy polychromatic compound two-dimensional code obtained in the step (2) as a carrier through airspace information modulation, and a second heavy polychromatic compound two-dimensional code of the compound airspace anti-counterfeiting information is generated;
(4) Chromatographic-spectral complex coding
The second polychromatic compound two-dimensional code and the third polychromatic compound two-dimensional code of the compound airspace anti-counterfeiting information generated in the step (3) are used as input variables, the values of an output variable CMYK are determined by the two variables together, and the third polychromatic compound two-dimensional code is implanted into the compound polychromatic compound two-dimensional code by utilizing a metameric technology or in a special ink mode (invisible ink and fluorescent ink) on the basis of CMYK four-color common printing ink through chromatographic-spectral compound coding, so that the polychromatic-multispectral compound anti-counterfeiting two-dimensional code is generated;
(5) Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code
After the color spectrum-spectrum composite information modulation in the step (4), outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code in a CMYK format, and printing and outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code by using common four-color ink and a common printing process.
Further, the method for generating the multi-spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code utilizes common two-dimensional code scanning equipment to directly read the clear code, and the first embedded code can be read after the optical color filtering treatment is carried out on the clear code; the second secret code information can be acquired by using a special reliability decoding program; the third ternary combination may be displayed by means of an infrared detection device.
Wherein, the reading includes electronic image reading and printing image reading.
The beneficial effects brought by the invention are as follows:
the invention relates to a multi-color spectrum-multi-spectrum compound anti-counterfeiting method two-dimensional code based on CMYK common ink, which is a color two-dimensional code compounded by a two-dimensional code presented in a clear code form and three two-dimensional codes hidden in the clear code form. The two-dimensional code is suitable for various application scenes, a plurality of two-dimensional codes are combined into a whole on the premise of not increasing the electronic display or output area of the two-dimensional code, meanwhile, the plain code and the secret code can be effectively distinguished, and the multi-color spectrum-multi-spectrum composite anti-counterfeiting function is realized; the common production process and the CMYK ink are used for printing, and the common code scanning equipment is used for reading, so that the technical problems that the existing color two-dimensional code and the existing composite two-dimensional code cannot be directly read, the anti-counterfeiting technology is single and the like are solved, the color two-dimensional code and the composite two-dimensional code have the advantages of low cost, convenience in reading, good anti-counterfeiting performance and the like, and the two-dimensional code technology is improved and developed.
Drawings
The invention will be further described with reference to the accompanying drawings and specific examples.
Fig. 1 is an image example diagram of a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code R, G, B channel under visible light;
FIG. 2 is an exemplary image diagram of a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code after being subjected to optical color filtering treatment by utilizing R, G or B single channel bandpass under an RGB mode;
FIG. 3 is an exemplary image diagram of a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code printed out according to CMYK four colors and subjected to optical color filtering treatment by utilizing R, G or B single-channel bandpass;
FIG. 4 is an image illustration of the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code under infrared detection equipment;
FIG. 5 is a flow chart of the generation of the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code;
fig. 6 is a flow chart of verifying authenticity of the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a method for generating a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code based on CMYK common ink, which comprises the following steps:
(1) Generation of clear and combination images
Inputting text information, audio and video or web page network link information into two-dimension code generating software according to the demands of article coding and anti-counterfeiting, and respectively generating a clear code two-dimension code image and a secret code two-dimension code image;
(2) Color coding
Based on a color encoder, taking a plain code and a first repeated password as input variables, wherein the plain code and the first repeated password are common binary images, a dark color module is represented by 0, and a light color module is represented by 1; RGB, CMYK, or l×ab is used as an output variable of the encoding table, and 0 or 1 is used to indicate whether each color component is used. Encoding and compositing the plain code and the first heavy secret code according to the defined color and gray information to generate a first heavy polychromatic spectrum composite two-dimensional code;
(3) Spatial information modulation
The anti-counterfeiting information is subjected to reliability information coding to obtain an airspace anti-counterfeiting dot matrix image based on the minimum printing ink point, the airspace dot matrix data is loaded into the first heavy polychromatic compound two-dimensional code by taking the first heavy polychromatic compound two-dimensional code obtained in the step (2) as a carrier through airspace information modulation, and a second heavy polychromatic compound two-dimensional code of the compound airspace anti-counterfeiting information is generated;
(4) Chromatographic-spectral complex coding
The second polychromatic compound two-dimensional code and the third polychromatic compound two-dimensional code of the compound airspace anti-counterfeiting information generated in the step (3) are used as input variables, the values of an output variable CMYK are determined by the two variables together, and the third polychromatic compound two-dimensional code is implanted into the compound polychromatic compound two-dimensional code by utilizing a metameric technology or in a special ink mode (invisible ink and fluorescent ink) on the basis of CMYK four-color common printing ink through chromatographic-spectral compound coding, so that the polychromatic-multispectral compound anti-counterfeiting two-dimensional code is generated;
(5) Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code
After the color spectrum-spectrum composite information modulation in the step (4), outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code in a CMYK format, and printing and outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code by using common four-color ink and a common printing process.
In an embodiment of the invention, the method for generating the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code uses common two-dimensional code scanning equipment to directly read the clear code under visible light, and the first embedded code can be read after optical color filtering treatment; the second secret code information can be acquired by using a special reliability decoding program; the third ternary combination may be displayed by means of an infrared detection device.
Wherein, the reading includes electronic image reading and printing image reading.
The present invention will be described in further detail with reference to examples, but the present invention is not limited to the following examples.
Example 1 method for generating Multi-color spectrum-Multi-Spectrum composite anti-counterfeiting two-dimensional code
The method is used for generating the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code, and the generation flow of the method is shown in fig. 5, and comprises the following steps:
(1) Two-dimensional code plain code and password image generation
Inputting text information, audio and video or web page network link information into two-dimension code generating software according to the demands of article coding and anti-counterfeiting, and respectively generating a visible code two-dimension code image which can be directly read under visible light, a secret code two-dimension code image which can be directly read after optical color filtering treatment and under infrared detection equipment;
(2) Color coding
Based on a color encoder, taking a plain code and a first repeated password as input variables, wherein the plain code and the first repeated password are common binary images, a dark color module is represented by 0, and a light color module is represented by 1; RGB, CMYK, or l×ab is used as an output variable of the encoding table, and 0 or 1 is used to indicate whether each color component is used. According to R, G, B or C, M, Y, K, under the condition of passing or filtering (absorbing), utilizing the defined color and gray information to compound the plain code and the secret code together through encoding to generate a first multi-color spectrum compound two-dimensional code with RGB or CMYK values representing color values;
(3) Spatial information modulation
Generating a printing quantum dot matrix primitive image of the anti-counterfeiting information through error detection and correction coding, performing pseudo-random information modulation processing on the printing quantum dot matrix primitive image to obtain an airspace anti-counterfeiting dot matrix image based on the smallest printing ink dots, and loading airspace dot matrix data into the first polychromatic compound two-dimensional code through airspace information modulation by taking the first polychromatic compound two-dimensional code obtained in the step (2) as a carrier to generate a second polychromatic compound two-dimensional code of the compound airspace anti-counterfeiting information;
(4) Chromatographic-spectral complex coding
And (3) taking the second polychromatic compound two-dimensional code and the third polychromatic compound password of the compound airspace anti-counterfeiting information generated in the step (3) as input variables and taking CMYK as output variables. Finding 4 groups of metameric color pairs according to the metameric mapping relation between the two, and performing color replacement on the second polychromatic spectrum composite two-dimensional code of the composite airspace anti-counterfeiting information to finish the chromatographic-spectral composite coding, namely: the third secret code is implanted in the third secret code based on the metameric technology or in a special ink mode (invisible ink and fluorescent ink) to generate a multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code;
(5) Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code
After the color spectrum-spectrum composite information modulation in the step (4), outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code in a CMYK format, and printing and outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code by using common four-color ink and a common printing process. The CMYK ink is a carbon-containing ink, and comprises silk screen printing, gravure printing, flexography printing, offset printing, ink-jet printing and laser printing ink, solvent ink, water-based ink and UV ink.
Example 2 identification of Multi-color spectrum-Multi-Spectrum composite anti-counterfeiting two-dimensional code
Under visible light, the mobile phone, the handheld scanning gun or the fixed scanning equipment can be used for directly reading the clear code; the corresponding band-pass optical filter is additionally arranged in front of a lens of the identifying and reading equipment (namely, a red filter is additionally arranged and can filter G+B) or computer image processing software is adopted to carry out analog color filtering (namely, the color filtering effect of the analog red filter can simultaneously close a G+B channel and only keep R channel color under an RGB mode, and simultaneously close an M+Y channel and only keep C+K channel color under a CMYK mode), so that the first secret code which can be implanted can be identified and read after the optical color filtering treatment is realized; the second secret code information can be acquired by using a special reliability decoding program; the third subcode may be displayed by means of an infrared detection device or computer image processing software simulating an infrared effect (i.e. closing the C + M + Y channel in CMYK format, leaving only the K channel color).
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (2)
1. The method for generating the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code based on the CMYK common ink is characterized by comprising the following steps of:
(1) Generation of clear and combination images
Inputting text information, audio and video or web page network link information into two-dimension code generating software according to the demands of article coding and anti-counterfeiting, and respectively generating a clear code two-dimension code image and three secret code two-dimension code images;
(2) Color coding
The method comprises the steps of compounding a plain code and a first repeated secret code according to defined color and gray information codes based on a color encoder to generate a first repeated polychromatic spectrum compound two-dimensional code;
(3) Spatial information modulation
The anti-counterfeiting information is subjected to reliability information coding to obtain an airspace lattice image based on the minimum printing ink point, the airspace lattice data is loaded into the polychromatic composite two-dimensional code through airspace information modulation by taking the first polychromatic composite two-dimensional code obtained in the step (2) as a carrier, and a second polychromatic composite two-dimensional code of the composite airspace anti-counterfeiting information is generated;
(4) Chromatographic-spectral complex coding
Performing chromatographic-spectral composite encoding on the second polychromatic compound two-dimensional code of the composite airspace anti-counterfeiting information generated in the step (3), and implanting a third polychromatic compound two-dimensional code into the second polychromatic compound two-dimensional code in a manner of metamerism technology based on CMYK four-color common printing ink to generate a polychromatic-multispectral compound anti-counterfeiting two-dimensional code;
(5) Multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code
After the color spectrum-spectrum composite information modulation in the step (4), outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code in a CMYK format, and printing and outputting the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code by using common four-color ink.
2. The method for generating the multi-color spectrum-multi-spectrum composite anti-counterfeiting two-dimensional code according to claim 1, wherein the common two-dimensional code scanning equipment is used for directly reading the clear code of the code under visible light, and the first embedded heavy secret code can be read after the code is subjected to optical color filtering treatment; obtaining second double-password information through a reliability information decoding program; the third ternary combination may be displayed by means of an infrared detection device.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407703A (en) * | 2010-09-25 | 2012-04-11 | 天津市阿波罗信息技术有限公司 | Another processing method for digitized anti-fake printing |
| CN102411717A (en) * | 2010-09-25 | 2012-04-11 | 顾泽苍 | Digital anti-counterfeit printing processing method |
| CN103390183A (en) * | 2012-05-09 | 2013-11-13 | 顾泽苍 | Generation method for anti-fake code applied to mobile phone recognition |
| WO2014112879A1 (en) * | 2013-01-21 | 2014-07-24 | Vignet'd B.V. | Method of printing printed matter comprising an optically readable code |
| CN106156821A (en) * | 2015-03-24 | 2016-11-23 | 天津市阿波罗信息技术有限公司 | A kind of optical readability bar code anti-counterfeit structure and implementation method |
| CN107205155A (en) * | 2017-05-24 | 2017-09-26 | 上海交通大学 | Quick Response Code based on human eye vision fusion characteristics on spatial domain hides picture system |
| CN108551540A (en) * | 2018-05-02 | 2018-09-18 | 北京印刷学院 | The printing quantum dot watermark encoder method of pseudo-random information spatial domain modulation |
| CN109376833A (en) * | 2018-12-21 | 2019-02-22 | 北京印刷学院 | Triple anti-fake two-dimension codes of pseudo-random information double exposure digital fluorescence images |
| CN109726788A (en) * | 2018-12-21 | 2019-05-07 | 北京印刷学院 | The hiding light and shade dicode two dimensional code of metamerism |
| CN109948766A (en) * | 2019-03-29 | 2019-06-28 | 北京印刷学院 | The composite coloured anti-fake two-dimension code of multi-code and its generation and reading method |
| US10445849B1 (en) * | 2016-08-15 | 2019-10-15 | Digimarc Corporation | Signal encoding based on spectral requirements |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869015B2 (en) * | 2001-05-30 | 2005-03-22 | Sandia National Laboratories | Tamper-indicating barcode and method |
-
2021
- 2021-08-13 CN CN202110928117.6A patent/CN113762446B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407703A (en) * | 2010-09-25 | 2012-04-11 | 天津市阿波罗信息技术有限公司 | Another processing method for digitized anti-fake printing |
| CN102411717A (en) * | 2010-09-25 | 2012-04-11 | 顾泽苍 | Digital anti-counterfeit printing processing method |
| CN103390183A (en) * | 2012-05-09 | 2013-11-13 | 顾泽苍 | Generation method for anti-fake code applied to mobile phone recognition |
| WO2014112879A1 (en) * | 2013-01-21 | 2014-07-24 | Vignet'd B.V. | Method of printing printed matter comprising an optically readable code |
| CN106156821A (en) * | 2015-03-24 | 2016-11-23 | 天津市阿波罗信息技术有限公司 | A kind of optical readability bar code anti-counterfeit structure and implementation method |
| US10445849B1 (en) * | 2016-08-15 | 2019-10-15 | Digimarc Corporation | Signal encoding based on spectral requirements |
| CN107205155A (en) * | 2017-05-24 | 2017-09-26 | 上海交通大学 | Quick Response Code based on human eye vision fusion characteristics on spatial domain hides picture system |
| CN108551540A (en) * | 2018-05-02 | 2018-09-18 | 北京印刷学院 | The printing quantum dot watermark encoder method of pseudo-random information spatial domain modulation |
| CN109376833A (en) * | 2018-12-21 | 2019-02-22 | 北京印刷学院 | Triple anti-fake two-dimension codes of pseudo-random information double exposure digital fluorescence images |
| CN109726788A (en) * | 2018-12-21 | 2019-05-07 | 北京印刷学院 | The hiding light and shade dicode two dimensional code of metamerism |
| CN109948766A (en) * | 2019-03-29 | 2019-06-28 | 北京印刷学院 | The composite coloured anti-fake two-dimension code of multi-code and its generation and reading method |
Non-Patent Citations (1)
| Title |
|---|
| 彭金萍.电测与仪表.2006,第43卷 (第489期),第33-36页 . * |
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