CN107480480B - Copyright attribution tracking method and device - Google Patents
Copyright attribution tracking method and device Download PDFInfo
- Publication number
- CN107480480B CN107480480B CN201710346169.6A CN201710346169A CN107480480B CN 107480480 B CN107480480 B CN 107480480B CN 201710346169 A CN201710346169 A CN 201710346169A CN 107480480 B CN107480480 B CN 107480480B
- Authority
- CN
- China
- Prior art keywords
- watermark
- image
- information
- identification information
- pixel point
- 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
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000001259 photo etching Methods 0.000 claims description 30
- 230000000694 effects Effects 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000007781 pre-processing Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 5
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000000206 photolithography Methods 0.000 description 17
- 239000002184 metal Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 229910052709 silver Inorganic materials 0.000 description 10
- 239000004332 silver Substances 0.000 description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000005323 electroforming Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 239000005022 packaging material Substances 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 6
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001453 nickel ion Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/16—Program or content traceability, e.g. by watermarking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
Abstract
The invention discloses a copyright ownership tracking method, which comprises the following steps: step S200, acquiring a hologram of watermark image information from a product to be inspected or a laser template to be inspected; step S300, extracting copyright identification information to be checked from the obtained hologram of the watermark image information; step S400, judging whether the copyright identification information to be checked contains the copyright identification information to be tracked; step 500 determines the copyright ownership tracking status according to the result of the determination in step S400. In order to solve the technical problems, the invention provides a copyright ownership tracking method and a copyright ownership tracking device, which organically fuse watermark information and a hologram together to generate anti-counterfeiting copyright tracking information and provide strong evidence for copyright tracking of copyright owners.
Description
Technical Field
The invention relates to the technical field of laser holographic anti-counterfeiting, in particular to a copyright ownership tracking method and device.
Background
In the laser packaging material industry, the microstructure image-text textures on a laser template are transferred to various plastic film materials by various impression copying process methods for laser materials, and various laser packaging materials with various styles cannot be produced without the laser template, so that the laser template with specific image-text texture information is a key core component of a laser packaging product.
The production process route of the laser template comprises the following steps: graphic design-holographic plate making-silver spraying electroforming-electroforming copy working plate. The manufacturing process comprises the following steps: 1. designing and manufacturing the laser pattern by using general design and drawing software (photoshop, corledrew, illustrator and the like); 2. color separation is carried out on each region of the pattern, different spatial frequencies and spatial angles are set, and a film is produced or a photoetching file is produced; 3. by utilizing the principle of laser interference, a pattern is imaged on a photoetching offset plate (a photosensitive material which coats photoresist on a glass substrate) by a holographic method or a dot matrix photoetching method to record interference fringes, and then the hologram is obtained by development. The hologram is microscopically composed of concave-convex relief type grating stripes with different frequencies and different angles, and the essence of producing various laser packaging materials is to copy the microstructure. However, the photoresist is very fragile, easy to damage and not reproducible in batch, so that the microstructure stripes need to be solidified on the wear-resistant reusable hard metal material; 4. spraying silver, forming a silver conductive layer on the surface of the photoresist hologram by a chemical silver plating method to make the conductive layer conductive; 5. electroforming, namely, taking the photoetching offset plate with the silver conducting layer as a cathode, putting the cathode into electrolyte containing nickel ions, plating metal nickel on a silver layer of the cathode by utilizing an electrolytic plating principle, and depositing the metal nickel to a certain thickness; 6. taking out the plate deposited with nickel metal with a certain thickness, removing the glass plate, and washing off the photoresist on the surface layer of the metal plate to obtain a hologram metal template with mirror image patterns; 7. similarly, the hologram metal stencil is put into the electroforming equipment as the cathode again, and a mirror image second generation metal stencil can be obtained, so that the descendant metal stencil can be copied; 8. the metal template can be used for transferring, printing and duplicating the holographic pattern on various plastic materials to obtain the holographic (laser) product.
The existing holographic plate making only focuses on the improvement of anti-counterfeiting technical characteristics, has few measures for protecting the copyright of the plate making, and generally only hides a micro character or pattern at a specific position or hides a special mark, but the character and pattern mark cannot be used as the evidence of copyright ownership. Therefore, the laser template mold with the micro-relief structure has the characteristic of reproducibility, and a rule violation person can copy and steal the template structure by a method of obtaining a subsequent edition through an abnormal channel or directly copying a finished product material, so that the rule violation person is worried that the right of a copyright owner is violated by legally copying and producing the same product.
The laser template of copyright owner can not be used for maintaining right after being stolen because no favorable evidence is available for proving that the pirated product is out of place or the evidence is insufficient, and especially, the templates with similar general textures are more difficult to distinguish imitation from piracy. The identification through professional institutions needs to use special instruments and equipment, and a long identification period is spent. Aiming at the situation, in order to effectively prevent the piracy of the laser template, quickly identify the copyright ownership after discovering the piracy and provide favorable evidence to prove the piracy, the invention discloses a method for identifying and tracing the copyright ownership.
Disclosure of Invention
In order to solve the technical problems, the invention provides a copyright ownership tracking method and a copyright ownership tracking device, which organically fuse watermark information and a hologram together to generate anti-counterfeiting copyright tracking information and provide strong evidence for copyright tracking of copyright owners.
The technical scheme provided by the invention is as follows:
a copyright ownership tracking method, comprising the steps of: step S200, acquiring a hologram of watermark image information from a product to be inspected or a laser template to be inspected; step S300, extracting copyright identification information to be checked from the obtained hologram of the watermark image information; step S400, judging whether the copyright identification information to be checked contains the copyright identification information to be tracked; step 500 determines the copyright ownership tracking status according to the result of the determination in step S400.
Compared with the original method of copyright protection only by adding the image-text secret mark without attribution information, the method is characterized in that a digital watermark is embedded in the pattern and has hiding property, the pattern can be presented as an element of the pattern without affecting the aesthetic degree, the pattern display area is large, the pattern can be copied and transferred along with a template without loss, and the pattern can be identified through an intelligent terminal APP, so that the identification is more convenient.
Preferably, the method further comprises the following steps: and S100, embedding the copyright identification information to be tracked into a laser template.
Preferably, the step S100 includes: s110, selecting a watermark region on an original image, embedding watermark information containing the copyright identification information into the watermark region, and generating a watermark image containing the copyright identification information to be tracked; s120, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph; s130, preprocessing the watermark image to obtain at least one channel gray image; s140, acquiring the gray value of each pixel point of the channel gray image; s150, acquiring a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the channel gray image belongs; and S160, generating a data packet according to the grating angle value of each pixel point of the acquired channel gray image and the corresponding grating stripe frequency according to a preset rule, photoetching on a photoetching plate according to the data packet, and developing to obtain the hologram containing the watermark information.
Preferably, the step S300 includes: s310, collecting light information diffracted by the hologram on the watermark image information; s320, acquiring holographic data of the copyright identification information to be checked according to the optical information; s330, acquiring image data corresponding to the holographic data according to a preset corresponding relation list; s340, calculating the image data by adopting a preset algorithm, and acquiring the watermark characteristic value of the copyright identification information to be checked.
Preferably, the step S400 further includes: s410, judging whether the watermark characteristic value of the copyright identification information to be detected contains the watermark characteristic value of the copyright identification information to be tracked.
Preferably, the holographic data includes a grating angle value of each pixel point on the hologram; the image data comprises a grey value of each pixel point on the hologram.
An apparatus for copyright attribution tracking, comprising: the watermark image acquisition module is used for acquiring watermark image information from a product to be inspected or a laser template to be inspected; the copyright identification extraction module is used for extracting copyright identification information to be checked from the watermark image information acquired by the watermark image acquisition module; the copyright identification judging module is used for judging whether the copyright identification information to be detected extracted from the copyright identification extracting module contains the copyright identification information to be tracked or not; and the tracking state confirmation module is used for determining the copyright attribution tracking state according to the judgment result of the copyright identification judgment module.
Preferably, the method further comprises the following steps: and the copyright identification information setting module 100 is used for embedding the copyright identification information to be tracked into the laser template.
Preferably, the copyright identification information setting module includes: the watermark image generation submodule is used for selecting a watermark region on an original image, embedding watermark information containing the copyright identification information into the watermark region and generating a watermark image containing the copyright identification information to be tracked; the watermark image setting submodule is used for dividing the watermark image into a plurality of different regional graphs according to a preset expression effect and setting a corresponding spatial frequency parameter for each regional graph; the watermark image preprocessing submodule is used for preprocessing the watermark image to obtain at least one channel gray level image; the gray value acquisition submodule acquires the gray value of each pixel point of the channel gray image; the grating angle value acquisition submodule acquires a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list, and the grating fringe frequency acquisition submodule acquires the grating fringe frequency corresponding to each pixel point according to the spatial frequency parameter corresponding to the regional graph to which each pixel point of the channel gray image belongs; the data packet generating module is used for generating a data packet according to the grating angle value of each pixel point of the acquired channel gray level image and the corresponding grating stripe frequency according to a preset rule, and the hologram generating module is used for photoetching on a photoetching plate according to the data packet and developing to obtain a hologram containing watermark information.
Preferably, the copyright identification extraction module includes: the acquisition module is used for acquiring the light information diffracted by the hologram on the watermark image information; the holographic data acquisition module is used for acquiring holographic data of the copyright identification information to be detected according to the optical information; the image data acquisition module acquires image data corresponding to the holographic data according to a preset corresponding relation list; and the computing module is used for computing the image data by adopting a preset algorithm and acquiring the watermark characteristic value of the copyright identification information to be checked.
Compared with the prior art, the invention provides a copyright ownership tracking method and a copyright ownership tracking device, and at least brings the following technical effects:
1. the invention embeds the watermark information in the original image, further embeds the copyright identification information in the watermark information, and expresses the watermark information through the diffraction of the holographic microstructure, thereby realizing the perfect integration of the digital watermark technology and the holographic technology, not only keeping the brightness and the aesthetic degree of the hologram, but also reducing the interference and the misjudgment rate of the hologram when identifying and extracting the watermark information, and greatly shortening the response time.
2. The invention combines the watermark information with the hologram, and realizes the expression of hidden information on the holographic microstructure by corresponding the gray value of the watermark image with the grating angle value for photoetching, thereby not only protecting the beauty and brightness of the hologram, but also avoiding interfering the reading of the watermark information in the hologram, solving the limitation of the combination application of the two in the prior art, expanding the application range of the digital watermark, and simultaneously increasing a composite holographic anti-counterfeiting technology.
3. The copyright identification information is embedded into the anti-counterfeiting watermark image information, the existing anti-counterfeiting technical characteristics are further improved, the anti-counterfeiting information identification effect is not influenced, the piracy tracking problem is solved, a reliable basis is provided for copyright owners, and the piracy behavior is further controlled.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a flow chart of one embodiment of a method of copyright ownership tracking of the present invention;
FIG. 2 is a flow chart of another embodiment of a copyright ownership tracking method of the present invention;
FIG. 3 is a flow chart of another embodiment of a copyright ownership tracking method of the present invention;
FIG. 4 is a schematic diagram of one embodiment of the present invention;
FIG. 5 is a schematic view of yet another embodiment of the present invention;
FIG. 6 is a schematic diagram of yet another embodiment of the present invention;
FIG. 7 is a schematic diagram of another embodiment of the present invention.
Fig. 8 is a block diagram of an embodiment of a copyright ownership tracking apparatus according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The invention provides an embodiment of a copyright ownership tracking method, and fig. 1 is a flow chart of the copyright ownership tracking method, which comprises the following steps: step S200, acquiring a hologram of watermark image information from a product to be inspected or a laser template to be inspected; step S300, extracting copyright identification information to be checked from the obtained hologram of the watermark image information; step S400, judging whether the copyright identification information to be checked contains the copyright identification information to be tracked; step 500 determines the copyright ownership tracking status according to the result of the determination in step S400.
Specifically, in the present embodiment, refer to fig. 1; when some icon on the market is found to be consistent with some pattern information of a developer or a producer, the producer or the developer needs to track a mold for generating some pattern so as to avoid economic loss of the developer; therefore, the mold developer first detects the found suspicious pattern information, and extracts the watermark information from the pattern information to verify the copyright. Copyright digital watermarks are carried on the holographic template, the laser packaging material printed by the holographic template and the product, so that copyright ownership can be identified and identified as long as copyright watermark information on the template or the product is identified and verified, if the laser template to be detected or pattern information to be detected contains copyright identification information, the same product is judged, and if the copyright identification information is not contained, the pirate product is judged; in identifying copyright information, the apparatus used includes: whether the watermark information exists or is correct can be judged through an identification program installed in the intelligent terminal.
Compared with the original method of copyright protection only by adding the image-text secret mark without attribution information, the method is characterized in that a digital watermark is embedded in the pattern and has hiding property, the pattern can be presented as an element of the pattern without affecting the aesthetic degree, the pattern display area is large, the pattern can be copied and transferred along with a template without loss, and the pattern can be identified through an intelligent terminal APP, so that the identification is more convenient.
Preferably, the method further comprises the following steps: and S100, embedding the copyright identification information to be tracked into a laser template.
Preferably, the step S100 includes: s110, selecting a watermark region on an original image, embedding watermark information containing the copyright identification information into the watermark region, and generating a watermark image containing the copyright identification information to be tracked; s120, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph; s130, preprocessing the watermark image to obtain at least one channel gray image; s140, acquiring the gray value of each pixel point of the channel gray image; s150, acquiring a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the channel gray image belongs; and S160, generating a data packet according to the grating angle value of each pixel point of the acquired channel gray image and the corresponding grating stripe frequency according to a preset rule, photoetching on a photoetching plate according to the data packet, and developing to obtain the hologram containing the watermark information.
Specifically, a further embodiment is provided on the basis of the above embodiment; as shown with reference to FIG. 2; developers need to set copyrighted identification information in the mold for piracy tracking; in the present embodiment, a process of embedding copyright information is provided; the method comprises the steps of embedding preset copyright digital watermark information into a design graph through an embedding algorithm to generate an image containing a digital watermark, enabling the watermark image to be hidden, using the watermark image as a design element or pattern of a laser plate to be converted into holographic plate making data together with other laser patterns, carrying out holographic plate making according to a conventional holographic plate making technology, electroforming a working template, and then making the laser holographic patterns into various laser packaging materials according to a conventional mould pressing technology.
The invention embeds the watermark information in the original image, further embeds the copyright identification information in the watermark information, and expresses the watermark information through the diffraction of the holographic microstructure, thereby realizing the perfect integration of the digital watermark technology and the holographic technology, not only keeping the brightness and the aesthetic degree of the hologram, but also reducing the interference and the misjudgment rate of the hologram when identifying and extracting the watermark information, and greatly shortening the response time.
Preferably, the step S300 includes: s310, collecting light information diffracted by the hologram on the watermark image information; s320, acquiring holographic data of the copyright identification information to be checked according to the optical information; s330, acquiring image data corresponding to the holographic data according to a preset corresponding relation list; s340, calculating the image data by adopting a preset algorithm, and acquiring the watermark characteristic value of the copyright identification information to be checked.
Preferably, the step S400 further includes: s410, judging whether the watermark characteristic value of the copyright identification information to be detected contains the watermark characteristic value of the copyright identification information to be tracked.
Preferably, the holographic data includes a grating angle value of each pixel point on the hologram; the image data comprises a grey value of each pixel point on the hologram.
Specifically, a further embodiment is provided on the basis of the above embodiment; as shown with reference to FIG. 3; the copyright information identification process comprises the following steps: the holographic template, the laser packaging material printed by the holographic template and the product all carry copyright digital watermarks, so that copyright ownership can be identified only by identifying and verifying copyright watermark information on the template or the product. Whether the watermark information exists or is correct can be judged through an identification program installed at the smart phone end.
The specific embodiments of the present application are as follows:
1. taking all patterns or characters or shading needing to be added with watermark information in the corresponding drawings, or local patterns of the corresponding drawings;
2. processing the corresponding figure, importing the processed figure into a program with a watermark embedding algorithm module, setting copyright identification information and preset watermark information (a string of numbers or figures randomly generated or generated according to a certain coding rule) and outputting a pattern carrying the watermark information through an embedding algorithm;
3. adjusting the gray threshold value of the pattern obtained in the step 2 by a 'hologram generation method containing watermark information', calculating the corresponding grating fringe frequency and angle of each pixel, and generating a data packet;
4. importing the data packet into a holographic plate making system, and making a plate according to a conventional holographic plate making process flow;
5. electroforming a working plate, and producing a laser material by mould pressing;
the method comprises the steps of embedding preset copyright digital watermark information and a secret key into a design graph through an embedding algorithm to generate an image containing a digital watermark, enabling the watermark image to be hidden, using the watermark image as a design element or pattern of a laser plate to be converted into holographic plate making data together with other laser patterns, carrying out holographic plate making according to a conventional holographic plate making technology, electroforming a working template, and then making the laser holographic patterns into various laser packaging materials according to a conventional mould pressing technology.
In the application of the invention, each watermark image information is generated by die pressing of a laser template; therefore, a watermark image containing copyright identification information needs to be pressed in a laser mould; this includes a process of generating a watermark image containing copyright identification information, a process of identifying the copyright identification information, and a process of confirming the copyright identification information, and therefore, there are the following:
in addition, in the present application, reference is made to a watermark image which includes embedded copyright identification information;
embedding watermark information in at least one channel of the watermark image by adopting a preset watermark algorithm to generate a watermark image containing the watermark information;
the original image can be an anti-counterfeiting mark or an anti-counterfeiting texture, and a brand-new anti-counterfeiting graphic image with attractive composition is generally designed by taking a LOGO, a pattern, character information and the like of a customer as design elements or materials and integrating factors such as anti-counterfeiting technical expression effect, mark manufacturing process requirements, dimension specifications and the like. The selection of the watermark area is selected by a client or a designer, and in the design process, the watermark information is embedded into which area or graph and whether the final effect of the area is compatible with the effect of other graphs or not are considered; further designing the copyright identification information in the form of watermark information; however, the actual operation process may decide to add the embedded watermark information after the design pattern is determined. This requires selecting a relatively large area of the image as the watermark region for embedding the watermark.
The watermark information is substantially a digital secret information expression form which can be numbers, letters, even graphic patterns and the like, the embedding of the watermark information in the design graph means that the image in the selected watermark area in the design graph is transformed through a specific watermark embedding algorithm, and the watermark information is embedded in the image in the watermark area through a coding mode (coded into 01 bits), and specifically, the parameter value of a certain channel of the image can be transformed. The watermark embedding algorithm is adopted to embed the watermark information into a certain channel of the watermark region image and then output the watermark image in the RGB mode, so that the channel gray level image containing the encrypted watermark information can be obtained only after the channels are separated. This step can also be omitted if the "watermark embedding software" existing in the prior art is a module with its own output mode conversion.
Secondly, processing the watermark image to convert the watermark image into holographic plate making data;
the processing of the watermark image specifically includes: and acquiring a noise information map of the watermark image, and performing channel separation on the noise information map to obtain the channel gray level image of at least one channel.
Thirdly, forming a hologram on the photoetching offset plate according to the holographic plate making data, and specifically comprising the following steps:
adjusting a gray scale threshold value of the channel gray scale image within a preset gray scale range, and acquiring a gray scale value of each pixel point of the channel gray scale image; the gray scale threshold of the channel gray scale image is adjusted by establishing a gradual change mapping model, and the same effect can be achieved by changing the color level. The invention designs the gray value and the grating angle to be in one-to-one correspondence, so the gray value is the grating angle value, and further the direction of the diffraction light of the grating is controlled, and the diffraction light is adjusted to the preset gray scale range because the diffraction light of the grating in the range can be collected by the camera lens and then converted into an electric signal for operation. And diffraction light at grating angles outside this range cannot be collected by the camera, which becomes invalid information. Therefore, in order to record and restore the encrypted signal carried by the watermark image to the maximum extent, the gray scale threshold is preferably in the preset gray scale range.
Dividing the watermark image into a plurality of different region graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each region graph; and carrying out region segmentation on the channel gray level image embedded with the watermark information, and aiming at setting different spatial frequency parameters for different region graphs so as to realize different microstructure stripes and show rich colors.
Acquiring a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the channel gray image belongs;
and generating holographic plate making data by the grating angle value of each pixel point of the acquired channel gray level image and the corresponding grating fringe frequency according to a preset rule. According to the different channels in which watermark information is embedded, the following situations can be divided:
1. when watermark information is only embedded in a single channel of the watermark image, a dot matrix is generated on the photoetching offset plate according to the number of pixel points of the channel gray level image and is used for point-by-point exposure. The channel gray level image of the channel in which the watermark information is embedded is obtained, specifically, a noise information map of the watermark image is obtained, channel separation is performed on the noise information map, and the channel gray level image of the channel in which the watermark information is embedded is obtained.
Acquiring a gray value of each pixel point of the channel gray image, acquiring a grating angle value corresponding to the gray value of each pixel point according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the channel gray image belongs.
And photoetching the corresponding pixel points on the photoetching offset plate according to the grating angle value and the grating fringe frequency of each pixel point.
FIG. 4 is a schematic diagram of an embodiment of the present invention. As shown in fig. 4, a represents a pixel point of the channel gray image, a represents a pixel point of the lithography offset, and when watermark information is embedded in a single channel, the pixel point a is subjected to lithography according to the grating angle value and the grating fringe frequency of the pixel point a of the channel gray image.
2. When watermark information is embedded into a plurality of channels of the watermark image, the number of pixel points on the photoetching plate is increased and is larger than the sum of the number of the pixel points of the plurality of channels. Taking two channels as an example, the following are specific: and acquiring channel gray level images of two channels embedded with watermark information, specifically acquiring noise information maps of the watermark images, performing channel separation on the noise information maps, and respectively acquiring the channel gray level images of each channel. Respectively obtaining the gray value of each pixel point in each channel gray image, obtaining the grating angle value corresponding to the gray value of each pixel point according to a preset corresponding relation list, and obtaining the grating stripe frequency corresponding to each pixel point according to the spatial frequency parameter corresponding to the regional graph to which each pixel point of the channel gray image belongs. And increasing the number of pixel points on the photoetching offset plate to be the sum of the number of pixel points of the two-channel gray level image. FIG. 5 is a schematic diagram of another embodiment of the present invention. As shown in fig. 5, a represents a pixel point of a first channel gray image, B represents a pixel point of another channel gray image, a, B, c, d represent a pixel point of a photolithography offset plate respectively, when watermark information is embedded in two channels, photolithography is performed on the pixel point a of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point a of the first channel gray image, photolithography is performed on the pixel point B of the photolithography offset plate according to the grating angle value and the grating fringe frequency of the pixel point B of the another channel gray image, and the remaining pixel points c and d on the photolithography offset plate are vacant and are not subjected to photolithography. As can be seen from fig. 5, the resolution of the photoresist plate is 4 times the resolution of the channel gray scale image.
The above embodiments are merely two examples, including but not limited to the above two cases. If watermark information is embedded in the three channels, correspondingly, the resolution of the photoetching offset plate is only required to be improved, and the number of pixel points on the photoetching offset plate is larger than the sum of the pixel points of the gray level images of the three channels. FIG. 6 is a schematic diagram of another embodiment of the present invention. As shown in fig. 6, a represents a pixel point of a first channel gray image, B represents a pixel point of a second channel gray image, C represents a pixel point of a third channel gray image, a, B, C, d represent a pixel point of a photolithography offset plate respectively, when watermark information is embedded in three channels, photolithography is performed on the pixel point a of the photolithography offset plate according to the grating angle value and the grating stripe frequency of the pixel point a of the first channel gray image, photolithography is performed on the pixel point B of the photolithography offset plate according to the grating angle value and the grating stripe frequency of the pixel point B of the second channel gray image, photolithography is performed on the pixel point C of the photolithography offset plate according to the grating angle value and the grating stripe frequency of the pixel point C of the third channel gray image, and the remaining pixel point d of the photolithography offset plate is vacant and is not subjected to photolithography.
FIG. 7 is a schematic diagram of another embodiment of the present invention. As shown in fig. 7, a represents a pixel point of the first channel gray image, B represents a pixel point of the second channel gray image, C represents a pixel point of the third channel gray image, a1, a2, a3, B1, B2, B3, C1, C2, C3 are pixel points on the lithographic offset plate respectively, photoetching is carried out on three pixel points a1, a2 and a3 according to the grating angle value and the grating stripe frequency of the pixel point A of the first channel gray level image, that is, the pixel point a of the first channel gray image is represented by three pixel points on the photolithography offset plate, and similarly, photoetching is carried out on three pixel points B1, B2 and B3 according to the grating angle value and the grating stripe frequency of the pixel point B of the second channel gray level image, and photoetching on three pixel points of C1, C2 and C3 according to the grating angle value and the grating stripe frequency of the C pixel point of the third channel gray level image.
Fourthly, forming a holographic mould pressing plate containing the hologram on the metal nickel plate in an electroforming mode;
a silver conductive layer is formed on the holographic graph surface of the photoetching plate by adopting a chemical silver plating method to enable the holographic graph surface to be conductive, the photoetching plate with the silver conductive layer is used as a cathode and is put into electrolyte containing nickel ions, and metal nickel is plated on the silver layer of the cathode by utilizing an electrolytic plating principle and is deposited to a certain thickness. And taking out the plate deposited with the nickel metal with a certain thickness, removing the glass plate, and washing away the photoresist on the surface layer of the metal plate to obtain a hologram metal template with mirror image patterns, namely the holographic mold pressing plate.
And fifthly, transferring the hologram on a plastic material through the holographic mould pressing plate to generate an anti-counterfeiting mark information image.
The anti-counterfeiting mark information image is formed by a laser pattern embedded with watermark information, and the watermark information is expressed by diffraction of a holographic microstructure and has identifiability. The invention realizes the anti-counterfeiting purpose of the anti-counterfeiting identification information image by identifying the anti-counterfeiting identification information image, reduces the interference and misjudgment rate of the hologram when identifying and extracting the watermark information by perfectly fusing the digital watermarking technology and the holographic technology, greatly shortens the response time, and simultaneously can keep the brightness and the aesthetic degree of the hologram on the laser plate.
The copyright identification information identification process of the invention is as follows:
and acquiring optical information diffracted by the hologram on the anti-counterfeiting identification information image, and acquiring corresponding holographic data according to the optical information. The holographic data refers to the grating fringe frequency and the grating angle value of each pixel point. And acquiring image data corresponding to the holographic data according to the preset corresponding relation list, wherein the image data refers to the gray value of the pixel point. And (4) corresponding the grating angle value and the gray value by self-defining a preset corresponding relation list to obtain the gray value of each pixel point. And calculating the gray value by adopting a preset algorithm, acquiring a watermark characteristic value, comparing whether the watermark characteristic value is matched with preset watermark information or not, and feeding back correct watermark information when the watermark characteristic value is matched with the preset watermark information.
Fig. 8 is a block diagram of a copyright ownership tracking apparatus, the copyright ownership tracking apparatus including: the watermark image acquisition module 200 is used for acquiring watermark image information from a product to be inspected or a laser template to be inspected; a copyright identification extracting module 300, which extracts copyright identification information to be checked from the watermark image information obtained by the watermark image obtaining module; a copyright identification judgment module 400 for judging whether the copyright identification information to be checked extracted from the copyright identification extraction module contains copyright identification information to be tracked; the tracking status confirmation module 500 determines the tracking status of the copyright ownership according to the judgment result of the copyright identification judgment module.
Preferably, the method further comprises the following steps: and the copyright identification information setting module 100 is used for embedding the copyright identification information to be tracked into the laser template.
Preferably, the copyright identification information setting module 100 comprises: a watermark image generation sub-module 110, selecting a watermark region on the original image, embedding watermark information containing the copyright identification information in the watermark region, and generating a watermark image containing the copyright identification information to be tracked; the watermark image setting submodule 120 is used for dividing the watermark image into a plurality of different regional graphs according to a preset expression effect and setting a corresponding spatial frequency parameter for each regional graph; the watermark image preprocessing submodule 130 is used for preprocessing the watermark image to obtain at least one channel gray level image; the gray value obtaining submodule 140 is used for obtaining the gray value of each pixel point of the channel gray image; the grating angle value obtaining submodule 150 obtains a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list; the grating fringe frequency obtaining submodule 160 obtains the grating fringe frequency corresponding to each pixel point according to the spatial frequency parameter corresponding to the regional pattern to which each pixel point of the channel gray level image belongs; the data packet generating module 170 is configured to generate a data packet according to a preset rule by using the obtained grating angle value of each pixel point of the channel gray image and the corresponding grating stripe frequency; and the hologram generating module 180 performs photoetching on a photoetching plate according to the data packet, and obtains the hologram containing the watermark information after developing.
Preferably, the copyright identification extraction module 300 includes: an acquisition module 310, configured to acquire optical information diffracted by the hologram on the watermark image information; a holographic data obtaining module 320, obtaining holographic data of the copyright identification information to be checked according to the optical information; the image data acquisition module 330 is configured to acquire image data corresponding to the holographic data according to a preset correspondence list; the calculating module 340 calculates the image data by using a preset algorithm, and obtains the watermark characteristic value of the copyright identification information to be checked.
It should be noted that the information interaction, execution process, and other contents between the modules in the apparatus are based on the same concept as the method embodiment, and specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A copyright ownership tracking method, comprising the steps of:
step S100, copyright identification information to be tracked is embedded into a laser template;
the step S100 includes:
s110, selecting a watermark region on an original image, embedding watermark information containing the copyright identification information into the watermark region, and generating a watermark image containing the copyright identification information to be tracked;
s120, dividing the watermark image into a plurality of different regional graphs according to a preset expression effect, and setting a corresponding spatial frequency parameter for each regional graph;
s130, preprocessing the watermark image to obtain at least one channel gray image;
s140, acquiring the gray value of each pixel point of the channel gray image;
s150, acquiring a grating angle value corresponding to the gray value of each pixel point of the channel gray image according to a preset corresponding relation list, and acquiring a grating stripe frequency corresponding to each pixel point according to a spatial frequency parameter corresponding to a regional graph to which each pixel point of the channel gray image belongs;
s160, generating a data packet according to the grating angle value and the corresponding grating stripe frequency of each pixel point of the acquired channel gray level image according to a preset rule, photoetching on a photoetching plate according to the data packet, and developing to obtain a hologram containing watermark information;
step S200, acquiring a hologram of watermark image information from a product to be inspected or a laser template to be inspected;
step S300, extracting copyright identification information to be checked from the obtained hologram of the watermark image information;
step S400, judging whether the copyright identification information to be checked contains the copyright identification information to be tracked;
step 500 determines the copyright ownership tracking status according to the result of the determination in step S400.
2. The copyright ownership tracking method according to claim 1, wherein said step S300 comprises:
s310, collecting light information diffracted by the hologram on the watermark image information;
s320, acquiring holographic data of the copyright identification information to be checked according to the optical information;
s330, acquiring image data corresponding to the holographic data according to a preset corresponding relation list;
s340, calculating the image data by adopting a preset algorithm, and acquiring the watermark characteristic value of the copyright identification information to be checked.
3. The copyright ownership tracking method according to claim 1, wherein the step S400 further comprises:
s410, judging whether the watermark characteristic value of the copyright identification information to be detected contains the watermark characteristic value of the copyright identification information to be tracked.
4. A copyright ownership tracking method as claimed in claim 2, wherein said holographic data includes a raster angle value for each pixel point on the hologram; the image data comprises a grey value of each pixel point on the hologram.
5. A copyright ownership tracking apparatus using the copyright ownership tracking method according to any one of claims 1 to 4, comprising:
the watermark image acquisition module is used for acquiring watermark image information from a product to be inspected or a laser template to be inspected;
the copyright identification extraction module is used for extracting copyright identification information to be checked from the watermark image information acquired by the watermark image acquisition module;
the copyright identification judging module is used for judging whether the copyright identification information to be detected extracted from the copyright identification extracting module contains the copyright identification information to be tracked or not;
and the tracking state confirmation module is used for determining the copyright attribution tracking state according to the judgment result of the copyright identification judgment module.
6. The apparatus for copyright ownership tracking according to claim 5, further comprising:
and the copyright identification information setting module is used for embedding the copyright identification information to be tracked into the laser template.
7. The apparatus for copyright ownership tracking according to claim 6, wherein said copyright identification information setting module comprises:
the watermark image generation submodule is used for selecting a watermark region on an original image, embedding watermark information containing the copyright identification information into the watermark region and generating a watermark image containing the copyright identification information to be tracked;
the watermark image setting submodule is used for dividing the watermark image into a plurality of different regional graphs according to a preset expression effect and setting a corresponding spatial frequency parameter for each regional graph;
the watermark image preprocessing submodule is used for preprocessing the watermark image to obtain at least one channel gray level image;
the gray value acquisition submodule acquires the gray value of each pixel point of the channel gray image;
a grating angle value obtaining submodule for obtaining grating angle values corresponding to the gray values of the pixel points of the channel gray image according to a preset corresponding relation list,
the grating fringe frequency acquisition submodule acquires grating fringe frequency corresponding to each pixel point according to the spatial frequency parameter corresponding to the regional graph to which each pixel point of the channel gray level image belongs;
a data packet generating module for generating data packets according to the grating angle values of the pixel points of the acquired channel gray level image and the corresponding grating stripe frequencies according to a preset rule,
and the hologram generating module is used for photoetching on a photoetching plate according to the data packet and developing to obtain the hologram containing the watermark information.
8. The apparatus for copyright ownership tracking according to claim 6, wherein said copyright identification extracting module comprises:
the acquisition module is used for acquiring the light information diffracted by the hologram on the watermark image information;
a holographic data acquisition module for acquiring the holographic data of the copyright identification information to be detected according to the optical information;
the image data acquisition module acquires image data corresponding to the holographic data according to a preset corresponding relation list;
and the computing module is used for computing the image data by adopting a preset algorithm and acquiring the watermark characteristic value of the copyright identification information to be checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710346169.6A CN107480480B (en) | 2017-05-17 | 2017-05-17 | Copyright attribution tracking method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710346169.6A CN107480480B (en) | 2017-05-17 | 2017-05-17 | Copyright attribution tracking method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107480480A CN107480480A (en) | 2017-12-15 |
| CN107480480B true CN107480480B (en) | 2020-12-01 |
Family
ID=60593476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710346169.6A Active CN107480480B (en) | 2017-05-17 | 2017-05-17 | Copyright attribution tracking method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107480480B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111300963A (en) * | 2019-11-22 | 2020-06-19 | 珠海市瑞明科技有限公司 | Variable lattice holographic invisible pattern forming method |
| CN111427107B (en) * | 2020-04-07 | 2022-02-15 | 上海冠众光学科技有限公司 | Diffraction optical element value model, diffraction optical element and manufacturing method thereof |
| CN111559572B (en) * | 2020-06-12 | 2023-06-02 | 山东泰宝信息科技集团有限公司 | Point light source reading laser encryption holographic anti-counterfeiting gasket and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828666A (en) * | 2006-04-12 | 2006-09-06 | 上海理工大学 | Fake proof method for printing optical holographic watermark certificate |
| CN101493929A (en) * | 2009-03-10 | 2009-07-29 | 厦门大学 | Method for generating hologram digital watermarking by appliance computer |
| WO2016075220A1 (en) * | 2014-11-14 | 2016-05-19 | Fedrigoni S.P.A. | Method and apparatus for manufacturing watermarked paper |
| CN105894435A (en) * | 2016-01-26 | 2016-08-24 | 南京风力舰信息技术有限公司 | Novel anti-counterfeit label processing method |
-
2017
- 2017-05-17 CN CN201710346169.6A patent/CN107480480B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828666A (en) * | 2006-04-12 | 2006-09-06 | 上海理工大学 | Fake proof method for printing optical holographic watermark certificate |
| CN101493929A (en) * | 2009-03-10 | 2009-07-29 | 厦门大学 | Method for generating hologram digital watermarking by appliance computer |
| WO2016075220A1 (en) * | 2014-11-14 | 2016-05-19 | Fedrigoni S.P.A. | Method and apparatus for manufacturing watermarked paper |
| CN105894435A (en) * | 2016-01-26 | 2016-08-24 | 南京风力舰信息技术有限公司 | Novel anti-counterfeit label processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107480480A (en) | 2017-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107480744B (en) | Anti-counterfeit label generation method containing watermark information and anti-counterfeit label | |
| US6782115B2 (en) | Watermark holograms | |
| CN107480480B (en) | Copyright attribution tracking method and device | |
| JP3431593B2 (en) | Content generation device, digital watermark detection device, content generation method, digital watermark detection method, and recording medium | |
| US6750985B2 (en) | Digital watermarks and methods for security documents | |
| US8009893B2 (en) | Security document carrying machine readable pattern | |
| JP4071261B2 (en) | Method and system using digital watermark | |
| US7113615B2 (en) | Watermark embedder and reader | |
| JP5009169B2 (en) | How to generate a security image to be printed on a bank note | |
| US20020080992A1 (en) | Watermarking holograms | |
| CN107688843B (en) | Hologram generating method and device containing watermark information | |
| US20030128861A1 (en) | Watermark embedder and reader | |
| Hou et al. | Copyright protections of digital content in the age of 3d printer: Emerging issues and survey | |
| Macq et al. | Applicability of watermarking for intellectual property rights protection in a 3D printing scenario | |
| JP4319157B2 (en) | Image processing method, falsification detection method, image processing apparatus, falsification detection apparatus | |
| CN107481179A (en) | Antifalsification label recognition methods with watermarked information and device | |
| CN107688283B (en) | Method and device for manufacturing holographic molded plate containing watermark information and holographic molded plate | |
| CN114881836A (en) | Picture watermark processing method and device | |
| Baumann et al. | Watermarking for fused deposition modeling by seam placement | |
| Hwang et al. | Identification method for digital image forgery and filtering region through interpolation | |
| KR20030055189A (en) | Apparatus and method for inserting and detecting hologram watermark | |
| JP7008950B2 (en) | Digital watermarking device and method | |
| Troian et al. | Development Latent Images based on Moire Effect. | |
| CN104778593A (en) | Anti-counterfeiting image encrypting and detecting method | |
| JP2001339598A (en) | Image processing unit, image processing method, and storage medium |
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 |