TWI378387B - Manufacturing method of printed article having hidden bar code - Google Patents

Description

1378387 IX. Description of the Invention: [Technical Field] The present invention relates to a method for manufacturing a printed matter having a hidden two-dimensional barcode, and more particularly to making a hidden two-dimensional barcode by using a digital halftone technique and A method of manufacturing a printed matter having a hidden two-dimensional barcode by reading and verifying an infrared light source. [Prior Art] Nowadays, 'digitalization, Internet, and various image copying treatments are selected'. Generally, people can quickly obtain duplicated documents. At the same time as fully enjoying the advancement of information technology, the issues of copyright, copyright management and document security maintenance have gradually received attention. The encryption technology used on current security documents often uses special materials or special printing methods to achieve anti-counterfeiting purposes, such as fluorescent silk, gravure printing, micro-words, window security lines and so on. However, the control of special materials is not easy, making the prevention of counterfeiting an important issue. In various printing methods, digital watermarking technology can be used to embed hidden messages or rounds in images or shading to judge whether a document is true or false by a hidden message or pattern detected by Bo. Furthermore, the existing image-in-image domain technology of the micro-structure includes the use of different thicknesses of network lines, different size dots, different patterns or small words to form a micro-printing structure. At present, there are several references that can be used as comprehensive reference for comparison of advantages and disadvantages: (1) visual invisibility of digital watermark hiding; (2) visual effect of digital watermark after copying of document shading; and (3) The convenience and diversity of watermark detection. 5 1378387 As mentioned above, the use of small printed structures such as dots, network cables, special patterns or tiny characters as anti-counterfeiting technology for security documents has been around for a long time. This method does not require the use of special printed materials or methods to reduce production costs. . Using a micro-printing structure that is beyond the human eye's visual system, the watermarks and other patterns can be hidden in different sizes of dot structures, and the technique can be used to hide the printed matter of the message or the pattern, and the human eye is at a distance of $ No ^ distinguishes the difference in these fine structures. However, φ 疋] is subjected to differential sampling of different sizes of dot structures by a copying machine, and the originally hidden message or pattern is emerged, thereby serving as an anti-counterfeiting mechanism for preventing the use of a copying machine to make forged or unauthorized copies. Another example has been the application of infrared rays in the printing process of printed matter. For example, offset printing uses infrared heating to reduce the viscosity of the ink, so it is matched. The characteristics of the infrared ink of the offset ink can be dried by the near-infrared heating device, while the carbon black substance (carb〇nblack) is expressed in the mid-infrared region. • The absorption rate of the large-sized printing industry is often strengthened by carbon black. The blackness value of the color (= ackness) is based on the carbon black's _ 、, and for the color relay performance ® 有 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此 此Recently, the National Printing Bureau of Japan used the optical properties of carbon black under and outside the line in 2004, and published a halftone dot-spot called lmageSwitch®, but it is not based on the concept of watermarking, but a similar icon. The form of ^ presents the 'paste number of the same color ink and carbon black through the county design H: the rim rim' will be protected against the characteristics of carbon black dots hidden in the complex image 6 , under the infrared photography observation will have the effect of changing the picture Because of its research on the arrangement of carbon black dots, it will be like the performance of color_, so the anti-counterfeit standard of Image verification h8 is usually the image of the cell block, and the watermark information is not made into the two-dimensional bar code form. In addition, the Republic of China Announcement No. 280893 invention patent reveals that the method of forming the invisible standard I and the method of reading the money, the injection contains the mixed oxides to the ', by the oxidation of IS sulfur, the sulphur dioxide Marked ink of a mixture of selected compounds from the group of charcoal acids - forming printed materials on the surface of the base f, and producing materials with a cover letter; and then injecting infrared rays of 2 to 1 G_ wavelength in invisible marks Above the material, the infrared absorption rate of the invisible mark area and other areas of the material is measured to identify the data represented by the tactile mark. However, the inventive patent No. 2_93 forms a hidden mark with a specific mixture, but does not disclose application to the production of a two-dimensional bar code form. In addition, the Republic of China Announcement No. 483558 discloses a special barcode identification structure, which is mainly used in the barcode identification mark, selects some of the positions, and prints with magnetic ink to form a specific barcode annotation, which is provided as a general The product is differentiated from the standard, and the magnetic reluctance structure of the detection can detect the position of the hidden magnetic ink for the purpose of distinguishing the authenticity of the special hidden barcode, and some of the marks can be printed by using infrared ink or fluorescent ink. It is also possible to use two or more kinds of inks to be printed at the same time or at the same time to provide identification and distinguishing. However, the invention patent No. 483558 mainly uses magnetic ink to form a hidden barcode, and 1378387 discloses that the infrared ink can be partially used for printing. However, the specific purpose of the external ink is not revealed. The two-dimensional knowledge--the popular human-machine interface, most of its applications are printed on paper and 'received the wealth and the way, but one code itself is squinting. It makes no sense and it is obvious;

For small product packaging or 2D barcodes on ID cards, it is necessary to provide a hidden two-dimensional strip because of the limited surface space available. The method of manufacturing printed matter to meet the increasing demand for special anti-counterfeiting printing. In view of this, the present invention proposes a method for improving the presentation of a two-dimensional barcode, and uses a digital dot encryption technique to hide the two-dimensional barcode in the decorative graphic of the eye to save the need to read the content of the two-dimensional barcode content. And then infra-red

The line source can be on the side. Moreover, since the difficulty of the mobile phone depends on the unit (such as CCD or CMOSm_ visible light and near-infrared stage, the detection requirement of the present invention can also be made by the signal of the infrared camera in the existing camera. The main object of the present invention is to provide a method for manufacturing a printed matter having a hidden two-dimensional barcode, which utilizes a combination of carbon black amplitude modulation dots (amplitude modulatlon and neutral gray frequency modulation (FM) 8 (including blue) , magenta, yellow three primary colors mixed dots), with a proper mix of two forms of dots to produce a print with a hidden two-dimensional bar code, the hidden two-dimensional bar code can be hidden in the decorative pattern of the print, and not Affecting the printing quality of the decorative pattern, the hidden two-dimensional barcode can be quickly read and verified via the infrared light source, thereby facilitating the improvement of manufacturing efficiency, manufacturing cost and convenience of use. The purpose of this month is to provide - There is a hidden two-dimensional strip mother's print. σ's lieU is shot with digital halftone technology to create a hidden-dimensional The print of the code, because the amplitude of the amplitude modulation and the frequency of the FM network are different, so that - "Printing and digging, the Japanese is now offering a two-dimensional barcode, which is conducive to the effect and the convenience of copying the copyright." Another object of the present invention is to provide a printing method with a two-transcoding type of money: a method for making a BCH error correction code for a two-order image ordering error code to make the hidden information have error correction capability. In order to overcome the problem of read errors that may occur when the image of the printed image is subjected to compression, cutting, rotation, translation, etc., and the image is detected by the light source, it is advantageous to improve the accuracy of the read verification. The second objective of the present invention is to provide - The method of making a two-dimensional bar code print, Wei-style silk-to-color _ _ ed ordered g) easy to control the distribution of n Tibetan-style two-dimensional bar ,, two-dimensional bar code _ rush to the black side, borrowing to touch the black The distance between the opaque grids = the hidden effect of the hidden two-dimensional barcode pattern is improved, thereby contributing to the improvement of the printing quality. For the above purposes, the present invention provides a printing with a hidden two-dimensional barcode. The manufacturing method of the product comprises the steps of: providing a shading of the two-dimensional barcode; using a wave correction guide to select the amplitude of the amplitude modulation (AM) dot and the concentration of the frequency modulation (FM) dot. The production is determined by the parameter setting of the haiftone screening; the shading concealment detail processing is performed on the parameter setting of the digital halftone network; the printing is output to the surface of a printed matter to form a hidden two-dimensional a bar code and a decorative pattern; and an infrared light source for detecting and reading information of the hidden two-dimensional bar code of the printed matter. 'Embodiment】 In order to make the above and other objects, features and advantages of the present invention more obvious and understandable DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In principle, the present invention is a carbon black (earbon b_ exhibits a large absorption rate in the infrared region of the spectrum, and a blue color (c_, magenta (Magenta), yellow (10) (four), etc. It is almost penetrated and is Wei_different to create a printing with a parental two-dimensional bar code. More specifically, the present invention utilizes a halftone theory of carbon black amplitude modulation dots and neutral gray frequency modulation dots. Two-dimensional bar code and decorative pattern, when visually observed, only the _ pattern of the tone-to-order tone is seen, but through the infrared light source view 1378387, it can be found that the halftone image formed by the carbon black in the decorative pattern is dark, neutral. Gray is almost _, visually can be seen _ face view, thus revealing a hidden one-dimensional bar code. In addition, the hidden two-dimensional bar code of the present invention will also be photographed when copying equipment is not fresh - The hidden two-dimensional bar code is visualized to achieve the purpose of the Lai announcement. In the present invention, the hidden two-dimensional bar code can be used for gamma reading by an infrared light source.

The -infrared image capture unit is used to capture the hidden two-dimensional image, which is composed of carbon black and ke, which appears under infrared illumination.

Please refer to the flow chart of the manufacturing method of the printed matter having the hidden two-dimensional bar code disclosed in the first embodiment of the present invention. The manufacturing method mainly includes the following steps: providing the shading of the two-dimensional bar code; The fine-concentration correction guide selects the concentration of the amplitude modulation (AM) dot of the shading and the concentration of the frequency modulation (FM) dot to determine the parameter setting of the digital halftone screening; The parameter δ of the digital halftone over-net is subjected to shading concealment detail processing; the printing wheel is turned to the surface of a printed matter to form a hidden two-dimensional barcode and decorative pattern; and an infrared light source is used for detecting and reading Information on the hidden 2D barcode of printed matter. It should be particularly noted that the manufacturing method of the present invention can be applied to a digital printing device in the form of software, firmware, or the like to achieve the purpose of automatically manufacturing a hidden two-dimensional barcode. . 11 1378387 • ★ Please refer to Figure 1 to greet 1 _, this method of making a two-dimensional barcode with a hidden two-dimensional bar code provides a two-dimensional strip. In the garment step, the two-dimensional barcode content of the present invention can use a variety of currently existing barcode formats to facilitate encryption design and decoding processing. For example, as shown in the accompanying drawings 1, which discloses a two-dimensional bar pattern of the preferred embodiment of the present invention, the coding of the two-dimensional bar code is not intended to limit the present invention. The two-dimensional bar code is based on a hypothetical number "6957-8" as the force of the two-dimensional bar code. First, the binary information "un_mHm111011" which converts "69572〇118" into a binary total of 3 digits (10)8) _ Cong Yin", which means black and white arrangement secret 'its towel! The representative represents 'black', and if the binary information is converted into a second-order image, it is the shading of the two-dimensional bar code shown in the attached picture. Furthermore, in this step, due to the pattern of the printed matter, various distortions may occur during the image capturing process, such as compression, cutting, rotation, translation, etc., especially when the Luming is subsequently verified by the infrared light source, there will inevitably be It is very important that the distortion condition produces 'how to resist the distortion and successfully remove the hidden two-dimensional Lattice system. Therefore, the present invention attempts to adopt the BCH error correction coding (β〇%).

Ray-Chaudhuri and Hocquenghem error correction c〇de) BCH fault-tolerant coding for the two-order image of the shading of the two-dimensional bar code, so that the hidden information therein has the ability of error correction. In addition, after fault-tolerant coding and repeating in the range of 25x25 pixels, it has been in the form of two-dimensional bar code 'but the graphics are too regular', the information hiding effect is not good, and the image is due to broom, 12 1378387 noise. When the distortion is corrupted, the decryption result will be inaccurate. In order to improve the ability of information hiding, the password part is scattered. However, the method of randomly scattering the position of the second-order image is quite a township, and the method is arranged in a number of ways. The method of (pseudorandom permutati〇n) repeats the information of the shading of the three-dimensional strip, and randomly repeats the t-positions of the bits to be randomly scattered and finally added to the control points for positioning. Referring to FIG. 1 and the accompanying drawings 2, 3 and 4, a second step of the manufacturing method of the printed matter having the hidden two-dimensional barcode of the preferred embodiment of the present invention is: selecting a shading using a concentration correction guide AM (amplitude m〇dulati〇n, _) concentration of the dot and frequency modulation (freqUency m〇 (Julati〇n, FM) dot concentration is set by the parameters of the digital hanchtone screening. In this step Based on the gradation limit of the printed output device, the continuous-tuning image can only be simulated by the two-step method of "having ink" and "no ink", and the human eye has the characteristic of blurring the integration of adjacent two-order dot. The original two-order image is observed at a certain distance. It seems to have a continuous tone (c〇ntinu〇us t〇ne) visual perception. Therefore, 'the continuous tone of the original pattern cannot be directly expressed, so that the pattern of the output is printed. It can also be close to the tone of the original pattern, and must be processed by halftone over-net processing, that is, the original gray scale is expressed by the same pitch but different dot sizes, or dense dots of the same dot size but different pitches. Shadow For example, the former is called amplitude modulation (AM) network, and the latter is called frequency modulation (FM) network. 13 1378387 Digital halftone network method can be divided into dot matrix method (〇_ dithering) and error touch method. (_Cai (4). In this step", scale color method

__ dlthering) heart (four) cage touch, secret silk scattered method (four) ^ 嶋 (four) used to form the touch point. The calculation principle of the dot matrix toning method is to determine the signal value of the 娜 点 point to be 】 or 〇 by continuously adjusting the original age value _ comparison. For digital printing equipment, the dot matrix method is the guiding digit. The square of the printing equipment is in accordance with the critical value, and the shadow is divided into non-overlapping continuous blocks, and the critical value matrix of the non-heavy coefficient is used in the design of the riding, and the value of the __ mode and the impurity receiving moment _ Influence, the non-like Pro Matrix can form a non-dot arrangement result. More specifically, it is to perform halftone processing on block impurities. The critical value of the block is to first quantize the original gray scale value into the order of the critical value matrix by the shoulder gray image G(i, j), if the formula (1). The number X(m,n) 'where m and η represent the length and width of the critical value matrix.

X(m,n) = Nx x No x (i~ 255 ........................0) Get the critical value After the order of the matrix x (m, n), the equation (2) is compared with the threshold matrix T to determine the signal value at which the pixel becomes 1 or :: (2) Η0»0 = |〇When x (m,n) >T(i,j) Χ(ιώ,π) < T〇,j) For example, if the network is over the network with a threshold matrix of size 8x8 and the screen angle is ,, first The image is divided into contiguous sub-blocks that do not overlap. The sub-block size is 8x8 pixels. If the gradation value calculated in this block is 14 1378387 31, the digital printing device will follow the threshold matrix. The values in the ink were inked, and a total of 31 positions were inked. In the condition of combining the hidden two-dimensional barcode and the decorative pattern, the present invention uses the different number of network lines of the amplitude modulation network to embed the hidden two-dimensional barcode into a flat network. In the mechanism of the amplitude modulation network, the higher the number of network lines The smaller the network point is; on the contrary, the lower the number of network lines, the larger the network point, and the difference cannot be made at a certain distance under the human visual mode. Thus, the concentration correction guide design hides the information texture and will form an amplitude modulation dot using an appropriate threshold matrix. In a preferred embodiment of the invention, the print output is an HP brand Deskjet 1280 ink jet printer with a resolution of 600 dpi output. As shown in Attachment 2, it reveals that the shading portion of the two-dimensional barcode of the present invention makes the 帛6x6 critical value matrix 'money line amplitude modulation halftone over the net, and the rest _ material printing machine M (Cyan), magenta (four) (4) Yellow (Yellow)-specific primary color mixed with neutral gray to form gray scale (class town, the actual guide table is observed under the optical microscope. As shown in the attached 3, it reveals the mesh structure of the concentration correction guide. Schematic. After comparing the three primary color gray scales (grayscale) composed of different concentration amplitude modulation (application) and neutral gray, the final measurement is based on the 3/oK concentration carbon black dot, which is actually the shading of the two-dimensional barcode. The more visual concentration is 'but the 1% concentration of carbon black _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The 4x4 threshold matrix is used for the dot-point configuration. Although it can raise the number of lines, the carbon black dot concentration is secret, and the purely too deep is not suitable as the floating 15 watermark shading. Therefore, the carbon black dot of 3% κ concentration is finally used as a benchmark. As disclosed in Attachment 4, it discloses the present invention A schematic diagram of a concentration correction guide table of the preferred embodiment. The present invention produces a concentration correction guide for matching experiments, and the selected digital printing device outputs under the same environmental setting to select a 3% K carbon black dot and a certain range. The tone is compared with the neutral gray, and finally the (four) segment whose visual proximity is close to the gray balance is found. That is, the concentration value of the carbon black dot (10) [) is determined first; then, based on the concentration value of the carbon black amplitude modulation dot, The concentration correction guide is used to select a corresponding density value of the neutral gray frequency modulation dot (FM). After comparing the concentration correction guides, the difference in visual difference between the neutral gray and the 3% kappa concentration is selected as the standard for the two-dimensional bar code hiding design. Referring to FIG. 1 and the accompanying drawings 4, 5a and 5b, the third step of the manufacturing method of the printed matter having the hidden two-dimensional barcode of the preferred embodiment of the present invention is: setting the parameter setting of the digital halftone network. Shading hides detail processing. While performing the concentration correction guide matching experiment, it is usually found that the over-network effect of the critical value matrix will have an impact on the formation of the hidden two-dimensional barcode. If the quality of the dot is bad, the wrong network (rnoiM) will result in a hidden two-dimensional barcode. Poor quality. As shown in the attached photo 5a, it discloses a schematic diagram of the hidden pattern of the preferred embodiment of the present invention before the boundary processing, wherein if the dot position distribution is poor, black or white edges are generated at the boundary of the hidden two-dimensional barcode, resulting in hiding. The effect is inconspicuous, because the present invention requires precise control of the position and quality of the dot, so the clustered ordered dithering is used to control the dot in the hidden two-dimensional bar code, avoiding the The boundary of the dimension bar code produces a black border.

" Then use the visual or camera image to identify the best blending/initial matching parameter', which is the recommended effect of the system for the control of a certain output condition. It discloses a preferred embodiment of the invention. The optimum matching parameters are obtained by the above matching experiments. As shown in the attached picture 5b, the hidden pattern is processed by the boundary pattern, and the neutral gray frequency modulation dot corresponding to the concentration value of different carbon black _ can be sorted out. Wire, in order to determine the carbon concentration of the carbon fiber in the subsequent determination, the direct concentration value of the neutral gray frequency modulation network can be selected. The method of manufacturing the article having the hidden one-dimensional bar code according to the preferred embodiment of the present invention is a fine step of outputting the object to the surface of a printed matter to form a hidden type. 2D barcodes and decorative patterns. After using the concentration correction guide shown in the attached 4 to find the optimal matching combination that meets the gray balance, it can be set according to the parameter of the digital halftone network (that is, the concentration value of the carbon black amplitude modulation dot and the neutral gray frequency modulation. The concentration value of the dot) actually uses the digital printing device output to produce a hidden two-dimensional bar code and decorative pattern. As shown in the attached photo 6a, it discloses a schematic view of a preferred embodiment of the present invention for viewing a printed matter with a naked eye under a normal light source, which prints the encoded pattern on an identification document (such as a student ID card, an ID card or a business card). on. In the course of the experimental test, the above-mentioned printed matter can be used as a test sample, and the appropriate grayscale value (gray seale) can be used to achieve good encryption and concealment effects, and the relevant parameters can be fed back as a hidden two-dimensional obstacle design _ 4 The indicator of the concentration correction guide. In addition to the identification documents, the above printed matter may also contain various packaging materials for products requiring a two-dimensional bar code, particularly a small product having only a limited printing area. Furthermore, the decorative difficulty may be selected from any _, pattern, letter, numeral, symbol or combination thereof, which is not intended to limit the invention. Referring to FIG. 1 and the accompanying drawings 6a and 6b, the fifth step of the manufacturing method of the printed matter having the hidden two-code according to the preferred embodiment of the present invention is: using an external light source for speculating and reading the printed matter. Information of Concealed Two-Dimensional Bar Code In this step, the present invention is an embodiment of an infrared light source having an infrared light-emitting diode (coffee) light-receiving device as an image capturing tool. BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the present invention is shown as a schematic view of a preferred embodiment of the present invention for viewing under normal light conditions. In the case of visual observation, the information of the hidden two-dimensional bar code is compared with the image of the installation. However, as shown in the attached drawing 6b, the preferred embodiment of the invention is characterized in that the halftone image of the hidden type II is dark, by the image of the printed image 2 of the infrared photographic apparatus. Ming, you can see a significant contrast through the camera. As attached? As shown in a, it discloses a schematic diagram of an original two-dimensional barcode image captured by an infrared photographic apparatus 1378387 in accordance with a preferred embodiment of the present invention. In some reading situations, the external and external lines of light may be used. After the image is taken, the captured image may be unevenly distributed due to environmental or device secrets. Referring to Figure 7b, it is disclosed that the preferred embodiment of the present invention is based on the second version of 7a. § The above image blurring problem is only by direct graph enhancement contrast (histGgram equalization), which usually can't distinguish the bright and dark parts from φ & and the gray scale distribution of the whole financial image cannot be borrowed from the threshold (threshold Re-sampling. Therefore, the present invention provides a step-by-step correction to the two-dimensional bar image by using the CLAHE, ContrasMimited adaptive histogram equ-, which cuts the overall image. Sub-regions of equal size and continuous non-overlapping, taking the size of the sub-area of the present invention set to 8x8 ® pixels, and then calculating the gray-scale distribution of the sub-region (10) and then equalizing, compared to linearizing the entire image. Processing, using the CL rope method for more precise clarity, can effectively distinguish the difference between the background tone and the hidden information tone, so that the correction of the image can improve the correctness of the resampling. As shown in the attached %, it discloses a schematic diagram of the image processing of the two-dimensional barcode image of the attached 7a using the (1) method in the preferred embodiment of the present month, which is subjected to limited contrast and straightforward adaptation. The equalization "吏, the background of the barcode image (decorative pattern) and the grayscale value of the 2D barcode are clearly separated, so that the sampling and decryption can be facilitated, and according to this principle, the correct hidden 2D barcode can be solved smoothly. (4) In the actual situation, the present invention proposes to change the way of 1 1378387 good one-dimensional bar code presentation, and to store the two-dimensional bar in the eye visual miscellaneous in the digital dot encryption, _ province_product (four) surface space Only when you need to read the information of the two-dimensional Mama content, you can use the infrared light source to perform the side. Moreover, since the image camera unit (such as (10) or CMOS) can make visible light and near-infrared light bands, it can be used as The invention can read the infrared light source of the information, and the detection function of the invention can be achieved by using the function of the infrared band of the existing camera mobile phone and matching the related image processing and decryption function. The upper household is opposite to the second one. Weiweima not only estimates the surface space of the printed matter, but also causes defects in the design of the overall decorative pattern. The invention of the first figure is combined with the carbon black amplitude modulation __) the ground gray contact point _ ( In the case of a mixture of blue, magenta, and yellow, the two primary colors are mixed, and the two types of nets are appropriately mixed to make a secret. The hidden two-dimensional strip is in the existing side of the article. And the printing clock that does not sway the decorative pattern 'The hidden two-dimensional barcode can be quickly read and verified via the infrared light source', thereby contributing to improvement in manufacturing efficiency, reduction in manufacturing cost, and increase in usability. Furthermore, the present invention utilizes digital halftone technology to produce a printed matter having a hidden two-dimensional barcode. Since the spatial frequency of the amplitude modulation and the frequency modulation dot is different, the general copying device exhibits a hidden two-dimensional barcode when it is copied, thereby facilitating the reproduction. Improve the anti-counterfeiting effect and increase the convenience of distinguishing copy copyrights. In addition, the present invention uses BCH error correction 容 for fault-tolerant coding of two-order images, so that 20 1378387 conceal information has the ability of error correction, such as overcoming the _ product image subjected to compression, cutting, rotation, translation, etc. The image capture may take _ error, so it can improve the accuracy of the read verification. M ^ ^ (clustered ordered dithering) facilitates the control of the distribution of dots in a hidden 2D barcode, avoiding the black or white edges of the 2D barcode pattern boundary, by controlling the carbon black dot and neutral

The distance between the gray grid points controls the hidden effect of hiding the two-dimensional strip, which is beneficial to improve the printing quality. Although this (four) e峨佳#关财,财麟肋 limits the invention, any person who turns this skill can make various changes and modifications in the spirit and scope of the present invention. The scope defined in the appended patent application shall prevail. [Simple description of the map]

Figure 1: Flow chart of the manufacturing method of the printed matter with the hidden two-dimensional barcode of the present invention. Attachment 1: A schematic view of a shading of a two-dimensional bar code in accordance with a preferred embodiment of the present invention. Attachment 2: A schematic diagram of a 6x6 threshold matrix in accordance with a preferred embodiment of the present invention. Attachment 3 is a schematic view showing a dot structure of a concentration correction guide of a preferred embodiment of the present invention. Attachment 4: Schematic diagram of a concentration correction guide of a preferred embodiment of the present invention. Attachment 5a: The hidden pattern of the preferred embodiment of the present invention is not intended to be processed prior to boundary processing. Attachment North: A schematic diagram of a hidden pattern after boundary processing in accordance with a preferred embodiment of the present invention. Attachment 6a: This is a picture of the printed matter under the normal light source (4). Attachment 6b: A schematic diagram of a print image taken by an infrared photographic device in the present embodiment of the present invention. Attachment 7a · · The present invention is a schematic diagram of a bar code image by an infrared or a shadow device. Attachment 7b: A schematic view of the preferred embodiment of the present invention with 帛7 added to the comparative value. The dimension of the bar code shirt is directly increased. This is the schematic diagram of the image processing after the image processing using the AHE method. twenty two

Claims (1)

】 Yuan Jian method of correcting the replacement page on September 28, 2001, which includes: ~%υ·μ, patent application scope: a printing with hidden two-dimensional barcode, length: shading for two-dimensional barcode; correction The guide selects the concentration of the amplitude modulation dot of the shading and the concentration of the frequency modulation = '峨 ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ The ash color frequency modulation dot composed of the two primary colors of the vapor color; the bottom texture of the parameter setting of the digital half-color ship net at the hidden detail; and the printing output to the surface of the printed matter to form a hidden two-dimensional bar and The decorative pattern 'where the hidden two-dimensional bar code is hidden in the decorative pattern of the printed matter ^ reveals the hidden type when the copying device forges a copy. = a manufacturing method for printing with a hidden two-dimensional barcode as described in item i of the patent application, wherein in the step of providing a two-dimensional exhausted shading, a BCH error is employed; and the positive encoding is for the two-dimensional barcode Yi's second-order image is encoded with "^. , the manufacturing method of the hidden two-dimensional strip mother's print described in the second paragraph of the patent application, wherein after the fault-tolerant coding, the pseudo-random number arrangement method is used to repeatedly arrange the information of the shading of the two-dimensional barcode, and The repeatedly arranged information positions are randomly scattered and added to the control points for positioning. Printed with the hidden two-dimensional bar code as described in the third paragraph of the patent application. September, 2010: '~^~ 〇月28曰Revision replacement page: The manufacturing branch, shot in the _ concentration school table __- array The toning method forms __. In the sound, the manufacturing method with the hidden two-dimensional product described in the first paragraph of the above-mentioned patent 1 & 1 is used, wherein in the step of printing the guide table using the indifference correction = the concentration value of the dot; and then based on the sugar dot The concentration value uses the forward guide to select the corresponding inversion value of the FM network. '辰又六. Such as Shen ° month patent 1 color circumference, the first paragraph of the product has a hidden two-dimensional article * * which in the implementation of the Yi Yi fine brush selection = array color control Hidden - Cloth avoids creating black borders at the boundaries of hidden 2D barcodes. 7. If you apply for the patent scope! The method for producing a printed product having a hidden two-dimensional bar code, wherein the printed matter is selected from the identification document in the step of printing the output to the surface of the printed matter. 8. The method for manufacturing a printed matter having a hidden two-dimensional bar as described in claim i, wherein after the step of printing the surface to the surface of the printed matter, the method further comprises: detecting and reading by using an infrared light source The information of the hidden two-dimensional bar code of the printed matter. 9. The method of printing the α α with the hidden two-dimensional bar as described in 8 items of Shen oblique (4), in the step of performing the gamma reading on the Xiang infrared light source, The original two-dimensional bar code image is captured by the infrared light source, and the two-dimensional bar code image is corrected by the _specificity adaptive quadrature equalization to distinguish the background. The background is corrected. The tone and the hidden page are corrected on September 28, 2011. The difference between the information tone. 10. The method of manufacturing a product having a hidden two-dimensional bar code as described in claim 8 wherein the infrared light source is selected from the image capturing unit of the camera phone. 25