CN114670564B - Intelligent printing method for packaging box with anti-counterfeiting hologram - Google Patents
Intelligent printing method for packaging box with anti-counterfeiting hologram Download PDFInfo
- Publication number
- CN114670564B CN114670564B CN202210312143.0A CN202210312143A CN114670564B CN 114670564 B CN114670564 B CN 114670564B CN 202210312143 A CN202210312143 A CN 202210312143A CN 114670564 B CN114670564 B CN 114670564B
- Authority
- CN
- China
- Prior art keywords
- holographic
- image
- watermark
- intelligent
- fourier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005516 engineering process Methods 0.000 claims abstract description 18
- 238000004422 calculation algorithm Methods 0.000 claims description 31
- 230000009466 transformation Effects 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000000354 decomposition reaction Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000013441 quality evaluation Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 238000013144 data compression Methods 0.000 claims description 5
- 239000005338 frosted glass Substances 0.000 claims description 5
- 238000001093 holography Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000011426 transformation method Methods 0.000 claims description 5
- 230000001131 transforming effect Effects 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 5
- 230000016776 visual perception Effects 0.000 claims description 5
- 238000007781 pre-processing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000021615 conjugation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
- G06F17/148—Wavelet transforms
Abstract
The invention discloses an intelligent printing method of a packaging box with an anti-counterfeiting hologram, wherein a computer terminal controls an intelligent printing surface to generate corresponding information by utilizing a holographic watermarking technology to form an intelligent holographic plate making; the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed; and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology. Accurate printing is achieved through an intelligent printing mode, and the safety and reliability of the packaging box are guaranteed through the anti-fake hologram.
Description
Technical Field
The invention relates to an intelligent printing technology, in particular to an intelligent printing method of a packaging box with an anti-counterfeiting hologram.
Background
The conventional anti-counterfeiting label is manufactured by storing hidden information in a holographic image by utilizing an optical conjugation principle, and the hidden information cannot be displayed in a common environment, so that consumers mostly adopt a simple laser pen irradiation mode to reproduce the hidden information, but the hidden information cannot be easily observed and recorded due to improper grasp of an irradiation distance and an irradiation angle by adopting the laser pen irradiation mode, so that a user cannot simply and quickly check the hidden information of the anti-counterfeiting label when buying a product, and the authenticity of the product cannot be easily distinguished.
The holographic watermarking technology can meet the comprehensive performance requirements of anti-counterfeiting products such as difficult imitation, easy identification, low cost and no public hazard. The method is suitable for the holographic watermarking scheme of the color printed matter and the authentication and identification method thereof, and the formed industrial application can effectively improve the reliability and the application range of the digital watermarking anti-counterfeiting technology, thereby bringing new development opportunities for the anti-counterfeiting field of the printed packaging product.
Disclosure of Invention
The invention provides an intelligent printing method of a packaging box with an anti-counterfeiting hologram, which aims to solve the problem that counterfeiting in the prior art is a violent action, the interests of merchants and consumers are seriously damaged by the counterfeiting action, and in order to effectively suppress the counterfeiting action, the merchants generally assign unique identities to the products by arranging anti-counterfeiting labels on the product packaging, so as to prevent the products from being counterfeiting, ensure the authenticity of the products, ensure the consumers to purchase the products with confidence, improve brand images and brand credits, and maintain the interests of the consumers and the merchants.
The conventional anti-counterfeiting label is manufactured by storing hidden information in a holographic image by utilizing an optical conjugation principle, and the hidden information cannot be displayed in a common environment, so that consumers mostly adopt a simple laser pen irradiation mode to reproduce the hidden information, but the hidden information cannot be easily observed and recorded due to improper grasp of an irradiation distance and an irradiation angle by adopting the laser pen irradiation mode, and the hidden information of the anti-counterfeiting label cannot be simply and quickly checked by a user when purchasing a product, so that the authenticity of the product cannot be easily distinguished.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an intelligent printing method of a packaging box with an anti-counterfeiting hologram, comprising:
an intelligent printing method of a packaging box with an anti-counterfeiting hologram, comprising:
s101: the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking;
s102: the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed;
s103: and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology.
Wherein, the holographic anti-counterfeiting pattern in the step S102 comprises: printing an anti-counterfeiting pattern by holographic Fourier halftone watermarking;
s1021: designing a packaging box printing plane design drawing through a computer terminal, wherein the packaging box printing plane design drawing adopts a holographic digital watermarking method;
s1022: introducing Fourier holographic transformation into a holographic digital watermarking algorithm, forming a holographic Fourier halftone watermarking algorithm by combining the holographic digital watermarking algorithm with a halftone technique, and applying the holographic Fourier halftone watermarking algorithm to anti-counterfeiting of a color image;
s1023: and analyzing the embedding mode of the holographic Fourier halftone watermarking algorithm in the color image, and if the analysis confirms that the embedding channel and the embedding strength meet the requirement of embedding the intelligent printing surface, forming a holographic Fourier halftone watermarking printing anti-counterfeiting pattern by corresponding information of the holographic Fourier halftone watermarking, and guiding the holographic Fourier halftone watermarking printing anti-counterfeiting pattern into the intelligent printing surface of the hidden image area in the intelligent holographic platemaking.
Wherein, the step S1023 includes:
s10231: performing quality evaluation on the holographic Fourier halftone watermark printing anti-counterfeiting pattern by using intelligent holographic platemaking characteristics;
s10232: if the embedding parameters of the holographic Fourier halftone watermark of the printed anti-counterfeiting image are determined to meet the requirements, the holographic Fourier halftone watermark printed anti-counterfeiting pattern is imported into the intelligent holographic platemaking through the computer terminal;
s10233: and setting an electric eye for identifying a positioning cursor of the packaging box at a specific position of the intelligent holographic plate making to form the intelligent holographic positioning plate making.
Wherein, the step S103 includes: and identifying a positioning cursor on the packaging box through an electric eye of the intelligent holographic positioning platemaking, and accurately transferring the holographic Fourier halftone watermark printing anti-counterfeiting pattern to the position of the positioning cursor of the packaging box through certain temperature and pressure after the electric eye senses the positioning cursor.
Wherein, the step S1022 includes:
fourier computing hologram manufacturing process: when the light beam is positioned on the object light wave front, the light field distribution after Fourier transformation is obtained through Fourier transformation calculation;
the optical field distribution is encoded by a computer terminal in a certain encoding mode, a digital image to be recorded and encoded is calculated and input, the digital image is normalized to obtain F (x, y), an original image is stored in a binary matrix in a discrete data form, F (x, y) is multiplied by a random phase to simulate the action of frosted glass diffuse light in optical holography, fourier transformation is carried out on the F (x, y) to obtain a Fourier spectrum F (x, y), and the dynamic range of a hologram is reduced; amplitude information and phase information are obtained from the fourier spectrum F (x, y), and a fourier computation hologram is finally generated.
Wherein, the step S1021 includes: in the process of designing the printing plane of the packaging box, the computer terminal displays a continuous tone image, tone change on the continuous tone image is formed by imaging substance particle density in a unit area in the image, and each imaging substance particle point represents fine level of substance particle shadow and color by reproducing tone and level of scenery;
the computer terminal converts the continuous tone image into a discrete tone image by a halftone processing method to simulate the visual perception of the continuous tone image, wherein the halftone processing method comprises the following steps: and comparing the continuous tone image with templates of various algorithms through a computer terminal, and generating halftone pixels according to the set threshold.
The step S10231 of evaluating the quality of the holographic Fourier halftone watermark printing anti-counterfeiting pattern comprises the following steps: randomly extracting a plurality of pixel points from the holographic Fourier halftone watermark printing anti-counterfeiting pattern, extracting corresponding pixel points from the corresponding printing pattern without embedded watermark, and amplifying the extracted pixel points to the size of a measuring window of a chromaticity measuring instrument;
performing chromaticity measurement on the amplified pixel points, calculating a plurality of color difference values according to the measured values of the plurality of chromaticity, taking an arithmetic average value of the calculated color difference values as a calculated color difference value between two final tested images, and judging the quality of the watermark image according to the calculated color difference value;
the principle of randomly extracting a plurality of pixel points is as follows: and carrying out histogram statistics on each sub-channel gray level image of each color image, taking a plurality of pixel points in a region with larger probability density, recording corresponding coordinates, and taking the pixel points on the original color host image through the recorded coordinates.
Wherein, embedding the watermark holographic anti-counterfeiting pattern in the packaging box in the step S103 comprises the following steps:
performing color channel separation on the selected color host image to respectively obtain C, M, Y channel gray images, and taking C, M, Y channel gray images as watermark information carrier images;
transforming the watermark information carrier image into a hologram by adopting a halftone Fourier calculation holographic method, and taking the hologram as information of a final embedded carrier image;
embedding the information embedded in the carrier image into a corresponding monochrome gray image to obtain a monochrome channel image containing the holographic watermark, and combining the monochrome channel image containing the holographic watermark and a corresponding monochrome channel without the watermark into an image in a printing color mode;
and scanning the image in the printing color mode, then carrying out channel separation to obtain a monochrome channel embedded with the watermark, carrying out secondary Haar wavelet decomposition and inverse Fourier transform on the monochrome channel embedded with the watermark, extracting watermark information from the monochrome channel embedded with the watermark, and taking the extracted watermark information as a watermark holographic anti-counterfeiting pattern.
Wherein, the step S103 is followed by preprocessing the holographic anti-counterfeiting pattern of the packaging box, and comprises the following steps:
filtering the holographic anti-counterfeiting pattern, extracting a watermark image from the printed anti-counterfeiting pattern, and removing noise from the watermark image by adopting a median filtering method;
the holographic anti-counterfeiting pattern is subjected to image enhancement treatment, so that the identification and verification of the image are facilitated;
and (3) carrying out binarization processing on the image by using the holographic anti-counterfeiting pattern, wherein the holographic anti-counterfeiting pattern is determined by using a threshold value, the pixel larger than the threshold value in the image is set as 1, the pixel smaller than the threshold value is set as 0, and the image is binarized by using a maximum inter-class variance method.
Wherein, after the step S1022, the method includes: carrying out multistage decomposition on the holographic digital watermark image by utilizing wavelet transformation, keeping low-frequency coefficients unchanged, then selecting a global threshold value, selecting different thresholds at different levels, setting the wavelet coefficients with absolute values smaller than the thresholds as 0, storing the rest wavelet coefficients, and obtaining corresponding data compression holograms;
the hologram low-frequency sub-image information is reserved when the wavelet transformation method is utilized, so that the high-frequency components of the hologram low-frequency sub-image information in the horizontal, vertical and diagonal directions are zero.
Compared with the prior art, the invention has the following advantages:
an intelligent printing method of a packaging box with an anti-counterfeiting hologram, comprising:
the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking; the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed; and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology. Thereby realizing accurate printing and guaranteeing the safety and reliability of the packaging box through the anti-counterfeiting hologram.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of an intelligent printing method of a package box with an anti-counterfeiting hologram according to an embodiment of the invention;
FIG. 2 is a flow chart of the process for producing the holographic anti-counterfeiting pattern by the intelligent printing method of the packaging box with the anti-counterfeiting hologram according to the embodiment of the invention;
fig. 3 is a flow chart of intelligent holographic plate making of an intelligent printing method for a package box with an anti-counterfeit hologram according to an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides an intelligent printing method for a packaging box with an anti-counterfeiting hologram, which comprises the following steps:
s101: the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking;
s102: the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed;
s103: and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology.
The working principle of the technical scheme is as follows: the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking; the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed; and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology.
The beneficial effects of the technical scheme are as follows: the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking; the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed; and printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of the packaging box by utilizing an automatic typesetting technology. Accurate printing is achieved through an intelligent printing mode, and the safety and reliability of the packaging box are guaranteed through the anti-fake hologram.
In another embodiment, the holographic security pattern in the step S102 includes: printing an anti-counterfeiting pattern by holographic Fourier halftone watermarking;
s1021: designing a packaging box printing plane design drawing through a computer terminal, wherein the packaging box printing plane design drawing adopts a holographic digital watermarking method;
s1022: introducing Fourier holographic transformation into a holographic digital watermarking algorithm, forming a holographic Fourier halftone watermarking algorithm by combining the holographic digital watermarking algorithm with a halftone technique, and applying the holographic Fourier halftone watermarking algorithm to anti-counterfeiting of a color image;
s1023: and analyzing the embedding mode of the holographic Fourier halftone watermarking algorithm in the color image, and if the analysis confirms that the embedding channel and the embedding strength meet the requirement of embedding the intelligent printing surface, forming a holographic Fourier halftone watermarking printing anti-counterfeiting pattern by corresponding information of the holographic Fourier halftone watermarking, and guiding the holographic Fourier halftone watermarking printing anti-counterfeiting pattern into the intelligent printing surface of the hidden image area in the intelligent holographic platemaking.
The working principle of the technical scheme is as follows: designing a packaging box printing plane design drawing through a computer terminal, wherein the packaging box printing plane design drawing adopts a holographic digital watermarking method; introducing Fourier holographic transformation into a holographic digital watermarking algorithm, forming a holographic Fourier halftone watermarking algorithm by combining the holographic digital watermarking algorithm with a halftone technique, and applying the holographic Fourier halftone watermarking algorithm to anti-counterfeiting of a color image; and analyzing the embedding mode of the holographic Fourier halftone watermarking algorithm in the color image, and if the analysis confirms that the embedding channel and the embedding strength meet the requirement of embedding the intelligent printing surface, forming a holographic Fourier halftone watermarking printing anti-counterfeiting pattern by corresponding information of the holographic Fourier halftone watermarking, and guiding the holographic Fourier halftone watermarking printing anti-counterfeiting pattern into the intelligent printing surface of the hidden image area in the intelligent holographic platemaking.
The beneficial effects of the technical scheme are as follows: designing a packaging box printing plane design drawing through a computer terminal, wherein the packaging box printing plane design drawing adopts a holographic digital watermarking method; introducing Fourier holographic transformation into a holographic digital watermarking algorithm, forming a holographic Fourier halftone watermarking algorithm by combining the holographic digital watermarking algorithm with a halftone technique, and applying the holographic Fourier halftone watermarking algorithm to anti-counterfeiting of a color image; and analyzing the embedding mode of the holographic Fourier halftone watermarking algorithm in the color image, and if the analysis confirms that the embedding channel and the embedding strength meet the requirement of embedding the intelligent printing surface, forming a holographic Fourier halftone watermarking printing anti-counterfeiting pattern by corresponding information of the holographic Fourier halftone watermarking, and guiding the holographic Fourier halftone watermarking printing anti-counterfeiting pattern into the intelligent printing surface of the hidden image area in the intelligent holographic platemaking. The reliability and the application range of the watermark anti-counterfeiting technology are effectively improved, and a new development opportunity is brought to the anti-counterfeiting field of printed packaging products.
In another embodiment, the step S1023 includes:
s10231: performing quality evaluation on the holographic Fourier halftone watermark printing anti-counterfeiting pattern by using intelligent holographic platemaking characteristics;
s10232: if the embedding parameters of the holographic Fourier halftone watermark of the printed anti-counterfeiting image are determined to meet the requirements, the holographic Fourier halftone watermark printed anti-counterfeiting pattern is imported into the intelligent holographic platemaking through the computer terminal;
s10233: and setting an electric eye for identifying a positioning cursor of the packaging box at a specific position of the intelligent holographic plate making to form the intelligent holographic positioning plate making.
The working principle of the technical scheme is as follows: performing quality evaluation on the holographic Fourier halftone watermark printing anti-counterfeiting pattern by using intelligent holographic platemaking characteristics; if the embedding parameters of the holographic Fourier halftone watermark of the printed anti-counterfeiting image are determined to meet the requirements, the holographic Fourier halftone watermark printed anti-counterfeiting pattern is imported into the intelligent holographic platemaking through the computer terminal; and setting an electric eye for identifying a positioning cursor of the packaging box at a specific position of the intelligent holographic plate making to form the intelligent holographic positioning plate making.
The beneficial effects of the technical scheme are as follows: performing quality evaluation on the holographic Fourier halftone watermark printing anti-counterfeiting pattern by using intelligent holographic platemaking characteristics; if the embedding parameters of the holographic Fourier halftone watermark of the printed anti-counterfeiting image are determined to meet the requirements, the holographic Fourier halftone watermark printed anti-counterfeiting pattern is imported into the intelligent holographic platemaking through the computer terminal; and setting an electric eye for identifying a positioning cursor of the packaging box at a specific position of the intelligent holographic plate making to form the intelligent holographic positioning plate making. Thereby playing the role of anti-counterfeiting.
In another embodiment, the step S103 includes: and identifying a positioning cursor on the packaging box through an electric eye of the intelligent holographic positioning platemaking, and accurately transferring the holographic Fourier halftone watermark printing anti-counterfeiting pattern to the position of the positioning cursor of the packaging box through certain temperature and pressure after the electric eye senses the positioning cursor.
The working principle of the technical scheme is as follows: and identifying a positioning cursor on the packaging box through an electric eye of the intelligent holographic positioning platemaking, and accurately transferring the holographic Fourier halftone watermark printing anti-counterfeiting pattern to the position of the positioning cursor of the packaging box through certain temperature and pressure after the electric eye senses the positioning cursor.
The beneficial effects of the technical scheme are as follows: and identifying a positioning cursor on the packaging box through an electric eye of the intelligent holographic positioning platemaking, and accurately transferring the holographic Fourier halftone watermark printing anti-counterfeiting pattern to the position of the positioning cursor of the packaging box through certain temperature and pressure after the electric eye senses the positioning cursor.
In another embodiment, the step S1022 includes:
fourier computing hologram manufacturing process: when the light beam is positioned on the object light wave front, the light field distribution after Fourier transformation is obtained through Fourier transformation calculation;
the optical field distribution is encoded by a computer terminal in a certain encoding mode, a digital image to be recorded and encoded is calculated and input, the digital image is normalized to obtain F (x, y), an original image is stored in a binary matrix in a discrete data form, F (x, y) is multiplied by a random phase to simulate the action of frosted glass diffuse light in optical holography, fourier transformation is carried out on the F (x, y) to obtain a Fourier spectrum F (x, y), and the dynamic range of a hologram is reduced; amplitude information and phase information are obtained from the fourier spectrum F (x, y), and a fourier computation hologram is finally generated.
The working principle of the technical scheme is as follows:
fourier computing hologram manufacturing process: when the light beam is positioned on the object light wave front, the light field distribution after Fourier transformation is obtained through Fourier transformation calculation; the optical field distribution is encoded by a computer terminal in a certain encoding mode, a digital image to be recorded and encoded is calculated and input, the digital image is normalized to obtain F (x, y), an original image is stored in a binary matrix in a discrete data form, F (x, y) is multiplied by a random phase to simulate the action of frosted glass diffuse light in optical holography, fourier transformation is carried out on the F (x, y) to obtain a Fourier spectrum F (x, y), and the dynamic range of a hologram is reduced; amplitude information and phase information are obtained from the fourier spectrum F (x, y), and a fourier computation hologram is finally generated.
The beneficial effects of the technical scheme are as follows: when the light beam is positioned on the object light wave front, the light field distribution after Fourier transformation is obtained through Fourier transformation calculation; the optical field distribution is encoded by a computer terminal in a certain encoding mode, a digital image to be recorded and encoded is calculated and input, the digital image is normalized to obtain F (x, y), an original image is stored in a binary matrix in a discrete data form, F (x, y) is multiplied by a random phase to simulate the action of frosted glass diffuse light in optical holography, fourier transformation is carried out on the F (x, y) to obtain a Fourier spectrum F (x, y), and the dynamic range of a hologram is reduced; amplitude information and phase information are obtained from the fourier spectrum F (x, y), and a fourier computation hologram is finally generated.
In another embodiment, the step S1021 includes: in the process of designing the printing plane of the packaging box, the computer terminal displays a continuous tone image, tone change on the continuous tone image is formed by imaging substance particle density in a unit area in the image, and each imaging substance particle point represents fine level of substance particle shadow and color by reproducing tone and level of scenery;
the computer terminal converts the continuous tone image into a discrete tone image by a halftone processing method to simulate the visual perception of the continuous tone image, wherein the halftone processing method comprises the following steps: and comparing the continuous tone image with templates of various algorithms through a computer terminal, and generating halftone pixels according to the set threshold.
The working principle of the technical scheme is as follows: in the process of designing the printing plane of the packaging box, the computer terminal displays a continuous tone image, tone change on the continuous tone image is formed by imaging substance particle density in a unit area in the image, and each imaging substance particle point represents fine level of substance particle shadow and color by reproducing tone and level of scenery; the computer terminal converts the continuous tone image into a discrete tone image by a halftone processing method to simulate the visual perception of the continuous tone image, wherein the halftone processing method comprises the following steps: and comparing the continuous tone image with templates of various algorithms through a computer terminal, and generating halftone pixels according to the set threshold.
The beneficial effects of the technical scheme are as follows: in the process of designing the printing plane of the packaging box, the computer terminal displays a continuous tone image, tone change on the continuous tone image is formed by imaging substance particle density in a unit area in the image, and each imaging substance particle point represents fine level of substance particle shadow and color by reproducing tone and level of scenery; the computer terminal converts the continuous tone image into a discrete tone image by a halftone processing method to simulate the visual perception of the continuous tone image, wherein the halftone processing method comprises the following steps: and comparing the continuous tone image with templates of various algorithms through a computer terminal, and generating halftone pixels according to the set threshold.
In another embodiment, the evaluating the quality of the holographic fourier half-tone watermark printed security pattern in step S10231 includes: randomly extracting a plurality of pixel points from the holographic Fourier halftone watermark printing anti-counterfeiting pattern, extracting corresponding pixel points from the corresponding printing pattern without embedded watermark, and amplifying the extracted pixel points to the size of a measuring window of a chromaticity measuring instrument;
performing chromaticity measurement on the amplified pixel points, calculating a plurality of color difference values according to the measured values of the plurality of chromaticity, taking an arithmetic average value of the calculated color difference values as a calculated color difference value between two final tested images, and judging the quality of the watermark image according to the calculated color difference value;
the principle of randomly extracting a plurality of pixel points is as follows: and carrying out histogram statistics on each sub-channel gray level image of each color image, taking a plurality of pixel points in a region with larger probability density, recording corresponding coordinates, and taking the pixel points on the original color host image through the recorded coordinates.
The working principle of the technical scheme is as follows: randomly extracting a plurality of pixel points from the holographic Fourier halftone watermark printing anti-counterfeiting pattern, extracting corresponding pixel points from the corresponding printing pattern without embedded watermark, and amplifying the extracted pixel points to the size of a measuring window of a chromaticity measuring instrument; performing chromaticity measurement on the amplified pixel points, calculating a plurality of color difference values according to the measured values of the plurality of chromaticity, taking an arithmetic average value of the calculated color difference values as a calculated color difference value between two final tested images, and judging the quality of the watermark image according to the calculated color difference value; the principle of randomly extracting a plurality of pixel points is as follows: and carrying out histogram statistics on each sub-channel gray level image of each color image, taking a plurality of pixel points in a region with larger probability density, recording corresponding coordinates, and taking the pixel points on the original color host image through the recorded coordinates.
The beneficial effects of the technical scheme are as follows: randomly extracting a plurality of pixel points from the holographic Fourier halftone watermark printing anti-counterfeiting pattern, extracting corresponding pixel points from the corresponding printing pattern without embedded watermark, and amplifying the extracted pixel points to the size of a measuring window of a chromaticity measuring instrument; performing chromaticity measurement on the amplified pixel points, calculating a plurality of color difference values according to the measured values of the plurality of chromaticity, taking an arithmetic average value of the calculated color difference values as a calculated color difference value between two final tested images, and judging the quality of the watermark image according to the calculated color difference value; the principle of randomly extracting a plurality of pixel points is as follows: and carrying out histogram statistics on each sub-channel gray level image of each color image, taking a plurality of pixel points in a region with larger probability density, recording corresponding coordinates, and taking the pixel points on the original color host image through the recorded coordinates.
In another embodiment, the embedding the watermark holographic anti-counterfeiting pattern in the packaging box in the step S103 includes:
performing color channel separation on the selected color host image to respectively obtain C, M, Y channel gray images, and taking C, M, Y channel gray images as watermark information carrier images;
transforming the watermark information carrier image into a hologram by adopting a halftone Fourier calculation holographic method, and taking the hologram as information of a final embedded carrier image;
embedding the information embedded in the carrier image into a corresponding monochrome gray image to obtain a monochrome channel image containing the holographic watermark, and combining the monochrome channel image containing the holographic watermark and a corresponding monochrome channel without the watermark into an image in a printing color mode;
and scanning the image in the printing color mode, then carrying out channel separation to obtain a monochrome channel embedded with the watermark, carrying out secondary Haar wavelet decomposition and inverse Fourier transform on the monochrome channel embedded with the watermark, extracting watermark information from the monochrome channel embedded with the watermark, and taking the extracted watermark information as a watermark holographic anti-counterfeiting pattern.
The working principle of the technical scheme is as follows: performing color channel separation on the selected color host image to respectively obtain C, M, Y channel gray images, and taking C, M, Y channel gray images as watermark information carrier images; transforming the watermark information carrier image into a hologram by adopting a halftone Fourier calculation holographic method, and taking the hologram as information of a final embedded carrier image; embedding the information embedded in the carrier image into a corresponding monochrome gray image to obtain a monochrome channel image containing the holographic watermark, and combining the monochrome channel image containing the holographic watermark and a corresponding monochrome channel without the watermark into an image in a printing color mode; and scanning the image in the printing color mode, then carrying out channel separation to obtain a monochrome channel embedded with the watermark, carrying out secondary Haar wavelet decomposition and inverse Fourier transform on the monochrome channel embedded with the watermark, extracting watermark information from the monochrome channel embedded with the watermark, and taking the extracted watermark information as a watermark holographic anti-counterfeiting pattern.
The beneficial effects of the technical scheme are as follows: performing color channel separation on the selected color host image to respectively obtain C, M, Y channel gray images, and taking C, M, Y channel gray images as watermark information carrier images; transforming the watermark information carrier image into a hologram by adopting a halftone Fourier calculation holographic method, and taking the hologram as information of a final embedded carrier image; embedding the information embedded in the carrier image into a corresponding monochrome gray image to obtain a monochrome channel image containing the holographic watermark, and combining the monochrome channel image containing the holographic watermark and a corresponding monochrome channel without the watermark into an image in a printing color mode; and scanning the image in the printing color mode, then carrying out channel separation to obtain a monochrome channel embedded with the watermark, carrying out secondary Haar wavelet decomposition and inverse Fourier transform on the monochrome channel embedded with the watermark, extracting watermark information from the monochrome channel embedded with the watermark, and taking the extracted watermark information as a watermark holographic anti-counterfeiting pattern.
In another embodiment, the preprocessing the holographic anti-counterfeiting pattern of the package after the step S103 includes: filtering the holographic anti-counterfeiting pattern, extracting a watermark image from the printed anti-counterfeiting pattern, and removing noise from the watermark image by adopting a median filtering method;
the holographic anti-counterfeiting pattern is subjected to image enhancement treatment, so that the identification and verification of the image are facilitated;
and (3) carrying out binarization processing on the image by using the holographic anti-counterfeiting pattern, wherein the holographic anti-counterfeiting pattern is determined by using a threshold value, the pixel larger than the threshold value in the image is set as 1, the pixel smaller than the threshold value is set as 0, and the image is binarized by using a maximum inter-class variance method.
The working principle of the technical scheme is as follows: filtering the holographic anti-counterfeiting pattern, extracting a watermark image from the printed anti-counterfeiting pattern, and removing noise from the watermark image by adopting a median filtering method; the holographic anti-counterfeiting pattern is subjected to image enhancement treatment, so that the identification and verification of the image are facilitated; and (3) carrying out binarization processing on the image by using the holographic anti-counterfeiting pattern, wherein the holographic anti-counterfeiting pattern is determined by using a threshold value, the pixel larger than the threshold value in the image is set as 1, the pixel smaller than the threshold value is set as 0, and the image is binarized by using a maximum inter-class variance method.
The beneficial effects of the technical scheme are as follows: filtering the holographic anti-counterfeiting pattern, extracting a watermark image from the printed anti-counterfeiting pattern, and removing noise from the watermark image by adopting a median filtering method; the holographic anti-counterfeiting pattern is subjected to image enhancement treatment, so that the identification and verification of the image are facilitated; and (3) carrying out binarization processing on the image by using the holographic anti-counterfeiting pattern, wherein the holographic anti-counterfeiting pattern is determined by using a threshold value, the pixel larger than the threshold value in the image is set as 1, the pixel smaller than the threshold value is set as 0, and the image is binarized by using a maximum inter-class variance method.
In another embodiment, the step S1022 includes: carrying out multistage decomposition on the holographic digital watermark image by utilizing wavelet transformation, keeping low-frequency coefficients unchanged, then selecting a global threshold value, selecting different thresholds at different levels, setting the wavelet coefficients with absolute values smaller than the thresholds as 0, storing the rest wavelet coefficients, and obtaining corresponding data compression holograms;
the hologram low-frequency sub-image information is reserved when the wavelet transformation method is utilized, so that the high-frequency components of the hologram low-frequency sub-image information in the horizontal, vertical and diagonal directions are zero.
The working principle of the technical scheme is as follows: carrying out multistage decomposition on the holographic digital watermark image by utilizing wavelet transformation, keeping low-frequency coefficients unchanged, then selecting a global threshold value, selecting different thresholds at different levels, setting the wavelet coefficients with absolute values smaller than the thresholds as 0, storing the rest wavelet coefficients, and obtaining corresponding data compression holograms; the hologram low-frequency sub-image information is reserved when the wavelet transformation method is utilized, so that the high-frequency components of the hologram low-frequency sub-image information in the horizontal, vertical and diagonal directions are zero.
The method provides convenience and rapidness for the subsequent hologram processing by acquiring the hologram manufacturing and reproducing process, wherein the formula of the hologram after diffraction at a certain distance is as follows:
wherein W (x, y) represents the hologram after diffraction at a certain distance; w (W) 0 (x 0 ,y 0 ) A hologram representing the original field; gamma represents the wavelength of the light wave; k represents the wave number of the light wave; j represents an inertial weight; d represents the diffraction distance; x and y represent the x-th and y-th points in the hologram; x is x 0 、y 0 X < th > of hologram representing original field 0 Point and y 0 And (5) a dot.
And obtaining ideal image quality after hologram reproduction through a hologram algorithm after diffraction at a certain distance.
The beneficial effects of the technical scheme are as follows: carrying out multistage decomposition on the holographic digital watermark image by utilizing wavelet transformation, keeping low-frequency coefficients unchanged, then selecting a global threshold value, selecting different thresholds at different levels, setting the wavelet coefficients with absolute values smaller than the thresholds as 0, storing the rest wavelet coefficients, and obtaining corresponding data compression holograms; the hologram low-frequency sub-image information is reserved when the wavelet transformation method is utilized, so that the high-frequency components of the hologram low-frequency sub-image information in the horizontal, vertical and diagonal directions are zero.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. An intelligent printing method for a packaging box with an anti-counterfeiting hologram is characterized by comprising the following steps:
s101: the computer terminal controls the intelligent printing surface to generate corresponding information by utilizing the holographic watermarking technology to form intelligent holographic platemaking;
s102: the holographic anti-counterfeiting pattern is led into a hidden image area in the intelligent holographic platemaking through a computer terminal, so that intelligent holographic positioning platemaking is formed;
s103: printing the holographic anti-counterfeiting pattern on the intelligent holographic positioning platemaking on a designated position of a packaging box by utilizing an automatic typesetting technology;
the holographic anti-counterfeiting pattern in the step S102 includes: printing an anti-counterfeiting pattern by holographic Fourier halftone watermarking;
s1021: designing a packaging box printing plane design drawing through a computer terminal, wherein the packaging box printing plane design drawing adopts a holographic digital watermarking method;
s1022: introducing Fourier holographic transformation into a holographic digital watermarking algorithm, forming a holographic Fourier halftone watermarking algorithm by combining the holographic digital watermarking algorithm with a halftone technique, and applying the holographic Fourier halftone watermarking algorithm to anti-counterfeiting of a color image;
s1023: and analyzing the embedding mode of the holographic Fourier halftone watermarking algorithm in the color image, and if the analysis confirms that the embedding channel and the embedding strength meet the requirement of embedding the intelligent printing surface, forming a holographic Fourier halftone watermarking printing anti-counterfeiting pattern by corresponding information of the holographic Fourier halftone watermarking, and guiding the holographic Fourier halftone watermarking printing anti-counterfeiting pattern into the intelligent printing surface of the hidden image area in the intelligent holographic platemaking.
2. The intelligent printing method of a package having an anti-counterfeit hologram according to claim 1, wherein the step S1023 comprises:
s10231: performing quality evaluation on the holographic Fourier halftone watermark printing anti-counterfeiting pattern by using intelligent holographic platemaking characteristics;
s10232: if the embedding parameters of the holographic Fourier halftone watermark of the printed anti-counterfeiting image are determined to meet the requirements, the holographic Fourier halftone watermark printed anti-counterfeiting pattern is imported into the intelligent holographic platemaking through the computer terminal;
s10233: and setting an electric eye for identifying a positioning cursor of the packaging box at a specific position of the intelligent holographic plate making to form the intelligent holographic positioning plate making.
3. The intelligent printing method of a package with an anti-counterfeit hologram according to claim 1, wherein the step S103 comprises: and identifying a positioning cursor on the packaging box through an electric eye of the intelligent holographic positioning platemaking, and accurately transferring the holographic Fourier halftone watermark printing anti-counterfeiting pattern to the position of the positioning cursor of the packaging box through certain temperature and pressure after the electric eye senses the positioning cursor.
4. The intelligent printing method for packaging box with anti-counterfeiting hologram according to claim 1, wherein the step S1022 comprises:
fourier computing hologram manufacturing process: when the light beam is positioned on the object light wave front, the light field distribution after Fourier transformation is obtained through Fourier transformation calculation;
the optical field distribution is encoded by a computer terminal in a certain encoding mode, a digital image to be recorded and encoded is calculated and input, the digital image is normalized to obtain F (x, y), an original image is stored in a binary matrix in a discrete data form, F (x, y) is multiplied by a random phase to simulate the action of frosted glass diffuse light in optical holography, fourier transformation is carried out on the F (x, y) to obtain a Fourier spectrum F (x, y), and the dynamic range of a hologram is reduced; amplitude information and phase information are obtained from the fourier spectrum F (x, y), and a fourier computation hologram is finally generated.
5. The intelligent printing method of a package having an anti-counterfeit hologram according to claim 1, wherein the step S1021 comprises: in the process of designing the printing plane of the packaging box, the computer terminal displays a continuous tone image, tone change on the continuous tone image is formed by imaging substance particle density in a unit area in the image, and each imaging substance particle point represents fine level of substance particle shadow and color by reproducing tone and level of scenery;
the computer terminal converts the continuous tone image into a discrete tone image by a halftone processing method to simulate the visual perception of the continuous tone image, wherein the halftone processing method comprises the following steps: and comparing the continuous tone image with templates of various algorithms through a computer terminal, and generating halftone pixels according to the set threshold.
6. The intelligent printing method for packaging box with anti-counterfeiting hologram according to claim 2, wherein the step of performing quality evaluation on the anti-counterfeiting pattern printed by holographic fourier half-tone watermark in S10231 comprises: randomly extracting a plurality of pixel points from the holographic Fourier halftone watermark printing anti-counterfeiting pattern, extracting corresponding pixel points from the corresponding printing pattern without embedded watermark, and amplifying the extracted pixel points to the size of a measuring window of a chromaticity measuring instrument;
performing chromaticity measurement on the amplified pixel points, calculating a plurality of color difference values according to the measured values of the plurality of chromaticity, taking an arithmetic average value of the calculated color difference values as a calculated color difference value between two final tested images, and judging the quality of the watermark image according to the calculated color difference value;
the principle of randomly extracting a plurality of pixel points is as follows: and carrying out histogram statistics on each sub-channel gray level image of each color image, taking a plurality of pixel points in a region with larger probability density, recording corresponding coordinates, and taking the pixel points on the original color host image through the recorded coordinates.
7. The intelligent printing method for packaging box with anti-counterfeiting hologram according to claim 1, wherein embedding the watermark holographic anti-counterfeiting pattern in the packaging box in the step S103 comprises:
performing color channel separation on the selected color host image to respectively obtain C, M, Y channel gray images, and taking C, M, Y channel gray images as watermark information carrier images;
transforming the watermark information carrier image into a hologram by adopting a halftone Fourier calculation holographic method, and taking the hologram as information of a final embedded carrier image;
embedding the information embedded in the carrier image into a corresponding monochrome gray image to obtain a monochrome channel image containing the holographic watermark, and combining the monochrome channel image containing the holographic watermark and a corresponding monochrome channel without the watermark into an image in a printing color mode;
and scanning the image in the printing color mode, then carrying out channel separation to obtain a monochrome channel embedded with the watermark, carrying out secondary Haar wavelet decomposition and inverse Fourier transform on the monochrome channel embedded with the watermark, extracting watermark information from the monochrome channel embedded with the watermark, and taking the extracted watermark information as a watermark holographic anti-counterfeiting pattern.
8. The intelligent printing method for packaging box with anti-counterfeiting hologram according to claim 1, wherein the step S103 is followed by preprocessing the holographic anti-counterfeiting pattern of the packaging box, comprising:
filtering the holographic anti-counterfeiting pattern, extracting a watermark image from the printed anti-counterfeiting pattern, and removing noise from the watermark image by adopting a median filtering method;
the holographic anti-counterfeiting pattern is subjected to image enhancement treatment, so that the identification and verification of the image are facilitated;
and (3) carrying out binarization processing on the image by using the holographic anti-counterfeiting pattern, wherein the holographic anti-counterfeiting pattern is determined by using a threshold value, the pixel larger than the threshold value in the image is set as 1, the pixel smaller than the threshold value is set as 0, and the image is binarized by using a maximum inter-class variance method.
9. The intelligent printing method for packaging box with anti-counterfeiting hologram according to claim 1, wherein the step S1022 comprises: carrying out multistage decomposition on the holographic digital watermark image by utilizing wavelet transformation, keeping low-frequency coefficients unchanged, then selecting a global threshold value, selecting different thresholds at different levels, setting the wavelet coefficients with absolute values smaller than the thresholds as 0, storing the rest wavelet coefficients, and obtaining corresponding data compression holograms;
the hologram low-frequency sub-image information is reserved when the wavelet transformation method is utilized, so that the high-frequency components of the hologram low-frequency sub-image information in the horizontal, vertical and diagonal directions are zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210312143.0A CN114670564B (en) | 2022-03-28 | 2022-03-28 | Intelligent printing method for packaging box with anti-counterfeiting hologram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210312143.0A CN114670564B (en) | 2022-03-28 | 2022-03-28 | Intelligent printing method for packaging box with anti-counterfeiting hologram |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114670564A CN114670564A (en) | 2022-06-28 |
| CN114670564B true CN114670564B (en) | 2024-03-22 |
Family
ID=82075434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210312143.0A Active CN114670564B (en) | 2022-03-28 | 2022-03-28 | Intelligent printing method for packaging box with anti-counterfeiting hologram |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114670564B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002043000A2 (en) * | 2000-11-22 | 2002-05-30 | S. H. Hi Start Ltd. | Hiding images in halftone pictures |
| CN1885342A (en) * | 2006-06-21 | 2006-12-27 | 北京交通大学 | Print domain trademark anti-counterfeit method based on digital watermark technology |
| CN101493929A (en) * | 2009-03-10 | 2009-07-29 | 厦门大学 | Method for generating hologram digital watermarking by appliance computer |
| US8064102B1 (en) * | 2010-07-01 | 2011-11-22 | Xerox Corporation | Embedding frequency modulation infrared watermark in digital document |
| CN102592257A (en) * | 2012-01-04 | 2012-07-18 | 上海理工大学 | Cyan, magenta, yellow and black (CMYK) color space-based optical holographic watermark algorithm |
| CN103879162A (en) * | 2014-04-08 | 2014-06-25 | 山东泰宝防伪技术产品有限公司 | Holographic two-dimension code gold stamping anti-counterfeit packaging bottle and manufacturing method thereof |
| CN103996166A (en) * | 2014-06-05 | 2014-08-20 | 上海理工大学 | Holographic anti-counterfeiting algorithm based on shape of screen dot |
| CN106875326A (en) * | 2017-02-21 | 2017-06-20 | 湖南工业大学 | A kind of method hidden in image is printed and extract audio anti-counterfeiting signal |
| CN111038128A (en) * | 2019-12-19 | 2020-04-21 | 安徽江南春包装科技有限公司 | Holographic anti-counterfeiting heat transfer printing product and printing method thereof |
| CN111291316A (en) * | 2020-01-21 | 2020-06-16 | 山东大学 | Multi-scale resistivity inversion method and system based on wavelet transformation |
| CN113989089A (en) * | 2021-09-07 | 2022-01-28 | 西安电子科技大学 | Invisible picture watermark processing method and system, computer equipment and intelligent terminal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020080992A1 (en) * | 2000-12-21 | 2002-06-27 | Decker Stephen K. | Watermarking holograms |
| US6782115B2 (en) * | 1998-04-16 | 2004-08-24 | Digimarc Corporation | Watermark holograms |
| FR2983317B1 (en) * | 2011-11-29 | 2014-01-10 | Commissariat Energie Atomique | METHOD FOR FORMING A SYNTHETIC HOLOGRAM IN A TRAMEE IMAGE |
| US10336114B2 (en) * | 2016-09-01 | 2019-07-02 | Steelscape, Llc | Method of flexographic printing over a textured surface |
-
2022
- 2022-03-28 CN CN202210312143.0A patent/CN114670564B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002043000A2 (en) * | 2000-11-22 | 2002-05-30 | S. H. Hi Start Ltd. | Hiding images in halftone pictures |
| CN1885342A (en) * | 2006-06-21 | 2006-12-27 | 北京交通大学 | Print domain trademark anti-counterfeit method based on digital watermark technology |
| CN101493929A (en) * | 2009-03-10 | 2009-07-29 | 厦门大学 | Method for generating hologram digital watermarking by appliance computer |
| US8064102B1 (en) * | 2010-07-01 | 2011-11-22 | Xerox Corporation | Embedding frequency modulation infrared watermark in digital document |
| CN102592257A (en) * | 2012-01-04 | 2012-07-18 | 上海理工大学 | Cyan, magenta, yellow and black (CMYK) color space-based optical holographic watermark algorithm |
| CN103879162A (en) * | 2014-04-08 | 2014-06-25 | 山东泰宝防伪技术产品有限公司 | Holographic two-dimension code gold stamping anti-counterfeit packaging bottle and manufacturing method thereof |
| CN103996166A (en) * | 2014-06-05 | 2014-08-20 | 上海理工大学 | Holographic anti-counterfeiting algorithm based on shape of screen dot |
| CN106875326A (en) * | 2017-02-21 | 2017-06-20 | 湖南工业大学 | A kind of method hidden in image is printed and extract audio anti-counterfeiting signal |
| CN111038128A (en) * | 2019-12-19 | 2020-04-21 | 安徽江南春包装科技有限公司 | Holographic anti-counterfeiting heat transfer printing product and printing method thereof |
| CN111291316A (en) * | 2020-01-21 | 2020-06-16 | 山东大学 | Multi-scale resistivity inversion method and system based on wavelet transformation |
| CN113989089A (en) * | 2021-09-07 | 2022-01-28 | 西安电子科技大学 | Invisible picture watermark processing method and system, computer equipment and intelligent terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114670564A (en) | 2022-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | No-reference image quality assessment with shearlet transform and deep neural networks | |
| CN1952975B (en) | Improved techniques for detecting, analyzing and using visible authentication patterns | |
| CN1669046B (en) | Visible authentication patterns for printed document | |
| EP1485863B1 (en) | Authenticating printed objects using digital watermarks associated with multidimensional quality metrics | |
| EP2320389A2 (en) | Visible authentication patterns for printed document | |
| CN106875326B (en) | Method for hiding and extracting audio anti-counterfeiting signal in printed image | |
| JP2006510329A (en) | Print medium authentication system and method | |
| Liu et al. | Detecting generated images by real images | |
| CN116664961B (en) | Intelligent identification method and system for anti-counterfeit label based on signal code | |
| CN115880749A (en) | Face deep false detection method based on multi-mode feature fusion | |
| Peng et al. | Identification of natural images and computer generated graphics based on hybrid features | |
| Sharma et al. | A dual watermarking scheme for identity protection | |
| CN114998080A (en) | Face tamper-proof watermark generation method, tamper detection method and attribute detection method | |
| Birajdar et al. | Computer Graphic and Photographic Image Classification using Local Image Descriptors. | |
| Wang et al. | Robust image watermarking via perceptual structural regularity-based JND model | |
| CN114670564B (en) | Intelligent printing method for packaging box with anti-counterfeiting hologram | |
| Morinaga et al. | Classification between natural and graphics images based on generalized Gaussian distributions | |
| JP4883457B2 (en) | Printed material production method, printed material and authenticity determination method | |
| JP3712392B2 (en) | Manufacturing method and authentication method of card on which digital information is printed using digital watermark technology, and apparatus thereof | |
| Asghar et al. | Image forgery detection using noise and edge weighted local texture features | |
| CN117499551B (en) | Encryption anti-counterfeiting printing method based on binary signals | |
| Chouhan et al. | Robust Minutiae Watermarking in Wavelet Domain for Fingerprint Security | |
| Hussan et al. | Reversible data hiding framework with content authentication capability for e-health | |
| GUPTA | FEATURE POINT EXTRACTION BASED GEOMETRICALLY RESILIANT DIGITAL IMAGE WATERMARKING | |
| Sahay et al. | Improving forgery detection technique using SURF & Segmentation algorithm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |