CN111556221B - Printed matter halftone information hiding and hiding method based on electronic hiding tool - Google Patents

Printed matter halftone information hiding and hiding method based on electronic hiding tool Download PDF

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CN111556221B
CN111556221B CN202010406208.9A CN202010406208A CN111556221B CN 111556221 B CN111556221 B CN 111556221B CN 202010406208 A CN202010406208 A CN 202010406208A CN 111556221 B CN111556221 B CN 111556221B
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halftone
hiding
image
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information
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CN111556221A (en
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刘国栋
胡文飞
谢佩
徐丁杰
赖杰轩
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Shaanxi University of Science and Technology
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/44—Secrecy systems
    • H04N1/4446—Hiding of documents or document information
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0025—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
    • H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
    • H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
    • H04N1/32267—Methods relating to embedding, encoding, decoding, detection or retrieval operations combined with processing of the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels

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Abstract

The invention discloses a printed matter halftone information hiding and revealing method based on an electronic revealing and revealing tool, which comprises the steps of scanning a two-dimensional code on a printed matter through a mobile phone end to access a halftone hidden information image with anti-counterfeiting information; generating an electronic halftone site hiding tool capable of displaying halftone hidden information according to the screening physical parameters of the halftone image and a halftone site generation algorithm of the electronic hiding tool, and automatically displaying the hidden information through loading and matching of the electronic halftone site hiding tool and the halftone hidden information image; the method can improve the efficiency and experience of verifying the authenticity of the product by consumers, and enables the anti-counterfeiting verification of the printed matter to be more direct and efficient.

Description

Printed matter halftone information hiding and hiding method based on electronic hiding tool
Technical Field
The invention belongs to the technical field of printed matter anti-counterfeiting, relates to a halftone image hiding information display technology of a printed matter, and particularly relates to a printed matter halftone information hiding and hiding method based on an electronic hiding tool.
Background
Along with the continuous development of social economy, the quality of life that people were given to the full-bodied product of lin Langmuir has brought very big promotion, and the effective printing package form of product has played extremely important effect in the sales promotion of product, circulation. The printing anti-counterfeiting effect of the outer package of the commodity can protect the commodity and increase the value of the product, and can attract consumers by virtue of the verification display direction of the appearance novelty, thereby promoting the sale of the commodity. Therefore, more and more enterprises pay attention to the anti-counterfeiting performance of the commodities, and take the commodities as innovative breakthrough of the products, so that the performance and the quality of the products are improved. In recent years, the traditional anti-counterfeiting technology for printed matters mainly focuses on the aspects of ink anti-counterfeiting, paper anti-counterfeiting, printing process anti-counterfeiting and the like, and limits the occurrence of piracy to a certain extent, but the anti-counterfeiting technologies are all based on equipment and materials, so that the production cost of products can be increased, higher requirements are provided for the production technology and equipment, and the application universality of the technology is limited to a certain extent.
In recent years, with the rapid development of internet and computer technologies, a new support is provided for a printing anti-counterfeiting technology, and more printing enterprises apply a computer image processing technology to a prepress image making process of a printed matter to form a printed matter halftone anti-counterfeiting technology. The halftone anti-counterfeiting technology of the printed matter is a mode without changing the printing process and increasing the extra cost of the product, and is concerned by enterprises and industries. The display of the half-tone hidden anti-counterfeiting information is realized through a printed or printed physical grating tool under a specific condition. However, the reliability and convenience of the physical grating have certain limitations in use, and the false proof experience of consumers is influenced.
Disclosure of Invention
The invention aims to provide a printed matter halftone information hiding and revealing method based on an electronic revealing and revealing tool.
In order to achieve the above object, the present invention adopts the following technical solutions.
A printed matter halftone information hiding and hiding method based on an electronic hiding tool comprises the following steps:
step 1: making an original carrier image and carrying out half-toning setting on the image;
step 2: embedding the hidden information into the halftone image carrier image in the step 1, and performing change processing on the hidden information to complete the hidden setting of the information;
and step 3: storing the halftone hidden information image loaded with the hidden information manufactured in the step 2 into a server, and manufacturing a two-dimensional code corresponding to the image;
and 4, step 4: generating a dot type electronic display and hiding tool on a mobile phone terminal display platform according to the dot physical structure parameters of the halftone image in the step 1;
and 5: and (4) superposing the dot type electronic display and hiding tool generated in the step (4) on the halftone hidden information image through a mobile phone terminal platform to realize the display of the hidden information.
Further, in the step 1, a file with the size of (1-10) cm x (1-10) cm, the output resolution of 800-2400dpi and the color mode of gray level is newly built in Photoshop, and the original carrier image is obtained.
Further, foreground color filling is carried out on the obtained original carrier image in the step 1, the foreground color filling rate is 25% -70%, then halftone screening operation is carried out in a bitmap mode, the screening line number is 100-.
Further, in the step 2, the hidden information is a gray image of (1-10) cm x (1-10) cm.
Further, in the step 2, the hidden information is embedded into the halftone image, the boundary of the hidden information is extracted, the non-boundary portion is removed, and the halftone dot information in the boundary of the hidden information is subjected to a slight displacement transformation, so that the hidden setting of the information is completed.
Further, in the step 3, a two-dimensional code corresponding to the halftone hidden information image containing the hidden information and stored in the server is produced, and after the user scans the two-dimensional code to access the server, the user enters a page to download the halftone image and stores the halftone image in the mobile phone storage space.
Further, in step 4, when the dot-type electronic display and hiding tool is generated, a point at the upper left corner (0, 0) of a display window of the mobile phone end is taken as a starting point, a screen adding angle of 45 degrees is taken as a boundary, and the screen dots at 45 degrees are included, wherein the 45 degrees refer to a left-direction included angle of a connecting line between the upper left corner and the lower right corner on a mobile phone screen;
when the dot is generated to the upper right with the dot at 45 degrees and with the screen angle of 45 degrees as a boundary, the rule is line generation, namely line generation, and the coordinate point (X) of the dot of the electronic display and hidden tooli,Yj) Calculated according to the following formula:
Xi＝W·(i-1)
Figure BDA0002491407030000031
Figure BDA0002491407030000032
when the dot is generated from the dot at the screening angle of 45 degrees to the left and down, the rule is column generation, i.e. one column generation, and the coordinate point (X) of the dot of the electronic display and hidden toolj,Yi) Calculated according to the following formula:
Xj＝W·(j-1) (4)
Figure BDA0002491407030000033
Figure BDA0002491407030000034
wherein, W is the width of the mesh point of the electronic display and hidden tool, D is the output resolution of the halftone image, and L is the number of the screen lines of the halftone image;
Figure BDA0002491407030000035
i represents a row label and j represents a column label; the above formula]The' represents rounding, M is the number of horizontal pixel points of the mobile phone screen, and N is equal to the number of vertical pixel points of the electronic display and hiding tool.
Further, in the step 4, according to the calculated coordinates of the dots of the electronic hiding tool, by applying a drawPoints function in the Android Studio of the Android development platform, the generation of the electronic hiding tool is completed, wherein the color of the dots is designated as black, and the shape of the dots is square.
Further, in the step 5, the halftone hidden information image stored in the mobile phone is called by the mobile phone terminal platform and displayed in the mobile phone terminal display area, and the electronic hiding tool in the step 4 is loaded on the halftone hidden information image, so that the display of the hidden information is realized.
The invention has the beneficial effects that:
the invention relates to a printed matter halftone information hiding and hiding method based on an electronic hiding tool, which is characterized in that access to halftone hidden information is realized by printing a two-dimensional code on a printed matter, and a halftone hidden information image with anti-counterfeiting information is accessed by scanning the two-dimensional code on the printed matter through a mobile phone terminal; according to the screening physical parameters of the halftone image and the generation algorithm of the halftone of the electronic display and hidden tool, the electronic halftone display and hidden tool capable of displaying halftone hidden information is generated, the hidden information is automatically displayed through the loading and matching of the electronic halftone display and hidden tool and the halftone hidden information image, and the anti-counterfeiting effect of the printed matter is fed back to consumers in real time; the efficiency and the experience that the consumer verified the product true and false can be improved for the anti-fake of printed matter is verified true and false more directly, more high-efficient, promotes the printing packing performance of product, promotes the commodity and sells.
Drawings
FIG. 1 is a flow chart of a method for hiding and displaying halftone information of a printed matter based on an electronic display and hiding tool
FIG. 2 is a diagram of information to be hidden
FIG. 3 is an image with hidden information
FIG. 4 is a two-dimensional code corresponding to a halftone hidden information image
FIG. 5 shows an electronic display and hiding tool at the mobile phone end
FIG. 6 is a diagram showing the effect of the reproduction of hidden information
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
As shown in fig. 1, the halftone information hiding and hiding method for printed matter based on electronic hiding tool of the present invention includes the following specific processes:
step 1: an original carrier image is made and a halftoning setting of the image is performed. A file with the size of (1-10) cm x (1-10) cm, the output resolution of 800-2400dpi and the color mode of gray scale is newly built in Photoshop. And (5) filling foreground colors into the image, wherein the setting range of the filling value is 25-70%.
And carrying out halftone screening operation on the image in a bitmap mode, wherein the screening line number is 100 and 200lpi, the screening angle is 45 degrees, and the shape of the screen dots is circular, so that a halftone image is formed.
Step 2: a gray file (image or character) with the size of 1-10 cm x (1-10) cm is selected and embedded into a halftone image as hidden information, the boundary of the hidden information is extracted, and the non-boundary part is removed. And carrying out micro displacement transformation on the dot information in the hidden information boundary to complete the hidden setting of the information.
And step 3: and (3) storing the halftone image loaded with the hidden information, which is manufactured in the step (2), into a server, and manufacturing a two-dimensional code corresponding to the image. The halftone image containing the hidden information is stored in the server and has a unique access address, and after a user scans the two-dimensional code to access the server, the halftone image can be downloaded after entering a page and is stored in a storage space of the mobile phone.
And 4, step 4: and (3) generating a dot type electronic display and hiding tool on a mobile phone terminal display platform according to the dot physical structure parameters of the halftone image in the step (1). The dot type electronic display and hiding tool generates a dot type electronic display and hiding tool by taking a point at the upper left corner (0, 0) of a display window of the mobile phone end as a starting point and taking a screening angle (45 degrees) as a boundary (including dots at 45 degrees, wherein the 45 degrees on a mobile phone screen refers to a left-direction included angle of a connecting line between the upper left corner and the lower right corner).
When the dot is generated rightwards with the screening angle (45 degrees) as a limit (including the dot at 45 degrees), the generated rule is line generation (namely line generation in a row), and the coordinate point (X) of the dot of the electronic display and hidden tooli,Yj) Calculated according to the following formula:
Xi＝W·(i-1) (1)
Figure BDA0002491407030000051
Figure BDA0002491407030000052
when the dot is generated to the left with the screening angle (45 degrees) as the boundary (including the dot at 45 degrees), the generated rule is column generation (namely, one column is generated), and the coordinate point (X) of the dot of the electronic display and hidden toolj,Yi) Calculated according to the following formula:
Xj＝W·(j-1) (4)
Figure BDA0002491407030000061
Figure BDA0002491407030000062
wherein, W is the width of the mesh point of the electronic display and hidden tool, D is the output resolution of the halftone image, L is the number of the screen lines of the halftone image, and S is the mesh point area rate of the background image;
Figure BDA0002491407030000063
i represents a row label and j represents a column label; the above formula]The' represents rounding, M is the number of horizontal pixel points of the mobile phone screen, and N is equal to the number of vertical pixel points of the electronic display and hiding tool.
According to the calculated coordinates of the dots of the electronic hiding tool, the generation of the electronic hiding tool is completed by applying a drawPoints function in an Android development platform (Android Studio) (wherein the color of the dots is designated as black, and the shape of the dots is square).
And 5: and (4) superposing the dot type electronic display and hiding tool generated in the step (4) on the halftone hidden information image through a mobile phone terminal platform to realize the display of the hidden information. And calling the halftone hidden information image stored in the mobile phone through the mobile phone terminal platform and displaying the halftone hidden information image in a mobile phone terminal display area. And (4) loading the electronic display and hiding tool in the step (4) on the halftone hidden information image to realize the display of the hidden information.
Examples
Taking Photoshop and a mobile phone with a certain famous brand in China as an example, the process of revealing and hiding the halftone hidden information image is implemented. The method comprises the following specific steps:
step 1: and (3) making a halftone original carrier image, newly building a file with the size of 6cm multiplied by 6cm in Photoshop, outputting the file with the resolution of 1050dpi and the color mode of gray level, and setting the dot area rate of the file to be 30%. And (3) carrying out halftone screening operation on the image in a bitmap mode, setting the screening line number to be 175lpi, setting the screening angle to be 45 degrees, and setting the shape of the screen points to be circular.
Step 2: taking the graph 2 as information to be hidden (3.5cm multiplied by 3.5cm), converting the information into a gray mode, embedding the information into a background image, extracting the boundary of the hidden information, and removing the non-boundary part. And carrying out micro displacement transformation on the dot information in the hidden information boundary to complete the hidden setting of the information. The halftone hidden information image is shown in fig. 3.
And step 3: the halftone image with the hidden information created in step 2 is stored in a server, and a two-dimensional code corresponding to the image is created, as shown in fig. 4. The halftone image containing hidden information in the server is stored with a unique access address. After a user scans the two-dimensional code to access the server, the halftone image can be downloaded after entering the page and stored in the storage space of the mobile phone.
And 4, step 4: calculating according to a generation method of the electronic dot displaying and hiding tool, and generating the electronic dot displaying and hiding tool, wherein D is 1050 dpi; m ═ 1080; n1080; l175 lpi; s is 0.3; and (4) solving the dot coordinates of the electronic implicit tool according to the formulas (1) to (6). Taking 45 degrees as a boundary line, including screen dots on the boundary line, and generating the screen dots on the right side of the boundary line in a line-by-line manner according to coordinate points; and on the left side of the boundary, generating the coordinates in a row.
The generation of the electronic display and hidden tool is completed by programming the Android platform (Android Studio) with the drawPoints function (the color of the dot in the function is designated as black, and the shape of the dot is square), as shown in fig. 5.
And 5: and (4) superposing the dot type electronic display and hiding tool generated in the step (4) on the halftone hidden information image through a mobile phone terminal platform to realize the display of the hidden information. The reproduction effect map is shown in fig. 6, and the intelligent display of halftone information is completed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (6)

1. A printed matter halftone information hiding and hiding method based on an electronic hiding tool is characterized by comprising the following steps:
step 1: making an original carrier image, and carrying out halftone setting on the image to obtain a halftone image carrier image;
step 2: embedding the hidden information into the halftone image carrier image in the step 1, and performing change processing on the hidden information to obtain a halftone hidden information image and complete the hidden setting of the information;
and step 3: storing the halftone hidden information image loaded with the hidden information manufactured in the step 2 into a server, and manufacturing a two-dimensional code corresponding to the image;
and 4, step 4: generating a dot type electronic display and hiding tool on a mobile phone terminal display platform according to the dot physical structure parameters of the halftone image carrier image in the step 1;
when the dot type electronic display and hidden tool is generated, a point at the upper left corner (0, 0) of a display window of the mobile phone end is taken as a starting point, a screen adding angle of 45 degrees is taken as a boundary, dots at 45 degrees are included, and the 45 degrees refer to a left-direction included angle of a connecting line between the upper left corner and the lower right corner on a mobile phone screen;
when the dot is generated to the upper right with the dot at 45 degrees and with the screen angle of 45 degrees as a boundary, the rule is line generation, namely line generation, and the coordinate point (X) of the dot of the electronic display and hidden tooli,Yj) Calculated according to the following formula:
Xi＝W·(i-1)(1)
Figure FDA0003504535460000011
Figure FDA0003504535460000012
when the dot is generated from the dot at the screening angle of 45 degrees to the left and down, the rule is column generation, i.e. one column generation, and the coordinate point (X) of the dot of the electronic display and hidden toolj,Yi) Calculated according to the following formula:
Xj＝W·(j-1) (4)
Figure FDA0003504535460000013
Figure FDA0003504535460000021
wherein, W is the width of the mesh point of the electronic display and hidden tool, D is the output resolution of the halftone image, and L is the number of the screen lines of the halftone image; s is the area ratio of the dots of the background image;
Figure FDA0003504535460000022
i represents a row label and j represents a column label; the above formula]"represents rounding, M is the number of horizontal pixels of the mobile phone screen, N is equal to the number of longitudinal pixels of the electronic display and hiding tool；
And 5: and (4) superposing the dot type electronic display and hiding tool generated in the step (4) on the halftone hidden information image through a mobile phone terminal platform to realize the display of the hidden information.
2. The halftone information hiding and hiding method for printed matters based on the electronic hiding tool as claimed in claim 1, wherein: and (2) performing foreground color filling on the obtained original carrier image in the step (1), wherein the foreground color filling rate is 25-70%, and then performing halftone screening operation in a bitmap mode, wherein the screening lines are 100-200lpi, the screening angle is 45 degrees, and the screen dots are circular, so that a halftone image carrier image is formed.
3. The halftone information hiding and hiding method for printed matters based on the electronic hiding tool as claimed in claim 1, wherein: in the step 2, the hidden information is embedded into the halftone image carrier image, the boundary of the hidden information is extracted, the non-boundary part is removed, the dot information in the hidden information boundary is subjected to micro displacement transformation to obtain a halftone hidden information image, and the hidden setting of the information is completed.
4. The halftone information hiding and hiding method for printed matters based on the electronic hiding tool as claimed in claim 1, wherein: in the step 3, a two-dimensional code corresponding to the halftone hidden information image containing the hidden information stored in the server is manufactured, and after the user scans the two-dimensional code to access the server, the user enters a page to download the halftone hidden information image and stores the halftone hidden information image in the storage space of the mobile phone.
5. The halftone information hiding and hiding method for printed matters based on the electronic hiding tool as claimed in claim 1, wherein: in the step 4, according to the calculated coordinates of the dots of the electronic hiding tool, the generation of the electronic hiding tool is completed by applying a drawPoints function in an Android Studio of an Android development platform, wherein the color of the dots is designated as black, and the shape of the dots is square.
6. The halftone information hiding and hiding method for printed matter based on electronic hiding tool as claimed in claim 5, wherein: in the step 5, the halftone hidden information image stored in the mobile phone is called by the mobile phone terminal platform and displayed in the mobile phone terminal display area, and the electronic display and hiding tool in the step 4 is loaded on the halftone hidden information image, so that the display of the hidden information is realized.
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