WO2010099738A1

WO2010099738A1 - Method for embedding and identifying information in print image

Info

Publication number: WO2010099738A1
Application number: PCT/CN2010/070828
Authority: WO
Inventors: 顾泽苍
Original assignee: Gu Zecang
Priority date: 2009-03-03
Filing date: 2010-03-02
Publication date: 2010-09-10
Also published as: CN102004929A; CN101996503A; CN101996503B; JP2010206433A; CN102004929B

Abstract

A method for embedding and identifying information in a print image is disclosed, which includes following steps: obtaining additional information to be embedded in the print image (S1); transforming the additional information into a screen code (S2); arranging the screen code to constitute shading image data (S3); superposing the additional information over the shading image data to obtain new image data and to output them (S4); reading the image data having the additional information embedded therein on a print medium, and performing a brightness and/or binarization process of them; identifying a microdot of the screen code; and outputting an identified result. The method is adaptable to embed the additional information in the print image by means of a common printer, and has the advantages of a small reading area, a low degree of grating interference, a fast identifying speed, etc.

Description

Method of embedding and identifying information in a printed image

The present invention relates to a method of embedding information and identifying information on a printed image and its use on a print medium. Background technique

In recent years, along with the rapid development of paper media publishing to electronic publishing, as an information recording medium, it is also changing from magnetic tape, 0 0 - 13⁄4 0 1^ to 50 card. Although the number of paper media publications is decreasing, the publication of paper media, which is known for its advantages of intuitiveness, evidence, and cheapness, will not be rooted. With the development of the publishing industry and the development of recording media, the technology of embedding information in print media has been greatly promoted. A technology that combines paper media publishing with electronic publishing has received great attention. It can be concluded that multimedia printing technology, which represents this trend, will be the key technology that will revolutionize the printing industry in the next century.

One of the representative methods related to multimedia printing technology is: In Japan, the patent entitled "Game data input device [^一阿于"一夕进装置 (license open 2005-124713)] is published. In the invention, it is proposed that the 2× bar code of the 6×6 dot matrix is overlapped with the printed image in a range of 0.5 mm, and the printed matter capable of realizing the dot reading function is printed, and then the dedicated playback device can be used to recognize the 6×6 dot matrix. The code value of the dimension bar code plays a corresponding sound according to the sound file corresponding to the code value.

The second representative method of multimedia printing technology is: In Japan, the method of inputting and outputting information in dot matrix mode is also disclosed: [Bu' Bu Bu Xi Xi 3⁄4" ^ Information Entry and Exit Method (International PCT Disclosure No. W02004/084125 ) ] and "printing structure for forming a media surface by printing a dot matrix, printing method, and reading method thereof [ κ y 卜 , ° 一印刷印刷印刷印刷印刷印刷印刷印刷印刷印刷印刷印刷印刷印刷Method (Patent Disclosure 2007-282272)] "The invention proposes that four reference lattices placed at the four corners of the square correspond to one information lattice, and eight different angles are formed at the center of the square lattice as information dot matrix placement Position, eight digital information, that is, three bits of information can be recorded separately.

In the 6×6 dot matrix two-dimensional barcode of the first method, it is only a method for reducing the dot size of the two-dimensional code, because there is a problem that the gray value of the shading is high, so that the printing object may be uncoordinated. sense. In addition, the amount of information is low and the size of the dot matrix mode is large, so it is difficult to apply to a general printer.

In the disclosure of the method 2, when the information point is identified by using the square lattice as the position reference of the information point, since at least two reference lattices are required for each information point, the efficiency of recording information is still low, for example. When the information point is 4 rows X 4 columns, it is necessary to distribute 9 rows X 9 column dots, so there will be low information recording efficiency. question. Almost all of the proposals so far have been considered from the perspective of how information is recorded, but the characteristics of the most important printing screens in printed images have been ignored. For example, the dot size characteristics of the printing screen, the dot spacing characteristics of the printing screen, and the dot distribution characteristics of the printing screen. As a result of these methods, after printing, the random distribution of information dots inevitably occurs, which affects the quality of printed images.

Further, in the method, for the symmetric square lattice, since the direction information of the information module is not provided, the rotation recognition means may cause an identification error.

The information recognition device designed by the above conventional method is not considered to reduce the cost, and a microprocessor can be used to recognize both the code value and the multimedia processing, and how to implement the LED illumination simply and beautifully.

The conventional method described above often causes print interference problems when printing shading with a printer, and how to solve it well is not mentioned.

In addition, in the second method, since the characteristics of the printed screen are not considered, the correct corresponding result of the distribution range of the information points and the distribution interval of the dots can not be clearly given.

Summary of the invention

An object of the present invention is to provide a method for information embedding and information recognition of a printed image and an application thereof on a printing medium, which proposes information recording efficiency when information is buried using an ordinary printer having low printing precision High, the reading area of the identification device is minimized, and the method of constructing the information module group in which the image quality of the printed image after embedding the additional information is not reduced is considered in consideration of the characteristics of the printing screen.

Another object of the present invention is to solve the problem of interference plaque which is avoided when printing a shading using a conventional printer. In order to achieve the object, the technical solution adopted by the present invention is to provide a method for information embedding and information identification of a printed image, which is implemented on an information embedding device and an information recognizing device, and the method includes the following steps. : In the information embedding device, image data to be buried as information and additional information to be buried briefly are read;

Performing screen coding conversion on additional information to be embedded in the image data, the screen encoding being a screen with simultaneous geometric or physical information embedded in the pattern having the characteristics of the printed screen Coded information module group;

Arranging through the information module group to form shading image data;

The read image data is coincident with the shading image data for outputting new image data, and the new image data output is further capable of outputting only shading image data, wherein the output of the new image data is formed by at least one form;

In the information recognition device, the partial or overall information of the print medium in which the additional information is embedded is read by the image sensor to embed the image data; Embedding the read information into image data to perform at least one image processing including brightness processing or binarization processing;

Identifying the screen-coded dots of the coded geometric or physical information embedded in the pattern with the characteristics of the printed screen, and identifying the code value of the screen-coded information module group code;

The recognition result is output.

At the same time, an application of information embedding and information recognition of printed images on a printing medium is also provided.

The effect of the present invention is that not only the printing of the additional information into the printing medium but also the printing of the additional information into the printing medium can be performed using a general printer. In addition, the proposed information is embedded in the screen code to minimize the read area; the print interference check pattern is controlled to a minimum extent, the robustness is high, the recognition speed is fast, the commodity cost is low, and the embedded printed image is not caused. Features such as reduced image quality.

DRAWINGS

Figure 1 is a flow chart of the information embedding device of the present invention;

Figure 2 is a flow chart of the information reading apparatus of the present invention;

3 is a diagram showing a representation of a screen coding with a number of dots of the present invention;

Figure 4 is a diagram showing a representation of a screen encoding of physics by phase modulation according to the present invention;

FIG. 5 is a diagram showing a representation of a screen format information module group form of the present invention; FIG.

6 is a diagram showing a configuration example of a new information module group by phase modulation according to the present invention;

7 is a diagram showing an example of a screen coding performance of the present invention which can solve the interference check problem;

FIG. 8 is a diagram showing a screen modulation phase modulation representation of the present invention that can solve the interference check problem;

9 is a diagram showing an example of a composition of a screen coding information module group capable of solving the interference check problem of the present invention;

Figure 10 shows an example of the occurrence of a printed interference check;

Figure 11 is a view showing an example of the phenomenon of no print interference check in the present invention;

Figure 12 is a flow chart of processing the information embedding device of the present invention;

Figure 13 is a diagram showing an example of the sequence information of the buried area as a playback value;

Figure 14 is a view showing an example of the case where the additional information is used as the coordinates of the printing medium;

Figure 15 is a diagram showing an example of embedding additional information into a document gap;

Figure 16 is a flow chart showing the processing of the information identifying apparatus of the present invention;

Figure 17 is a diagram showing an example of an electronic circuit configuration of an information recognition device of the present invention;

Figure 18 is a view showing an example of the configuration of an image sensor portion of the information recognition device of the present invention;

Figure 19 is a view showing an example of the structure of the information embedded in the printing medium of the present invention; Figure 20 is a view showing an example of the configuration of an LED display portion of the information recognition device of the present invention;

Figure 21 is a conceptual diagram of an application example of the multimedia printed matter of the present invention;

Figure 22 is a conceptual diagram of another application example of the multimedia printed matter of the present invention;

Figure 23 is a diagram showing an embodiment of another dot matrix mode of the present invention;

Figure 24 is an illustration of a dot pattern of different directions of the present invention;

Figure 25 is a diagram showing an example of an information module group constituting a 4*4 dot matrix using characteristics of recording information by phase modulation of a halftone dot;

Figure 26 is an embodiment of a multi-bit screen coding mode group of a 4*4 dot matrix having a 45 degree rotation of the present invention.

detailed description

The application of the information embedding and information identification method of the printed image of the present invention on a printing medium will be described with reference to the accompanying drawings and embodiments.

First, the terms involved in the present invention are defined as follows:

In the present embodiment, the "pixel" is the smallest unit constituting the image, the "spot" is the minimum unit of the screen corresponding to the pixel constituting the smallest unit of the image, and the "point of the dot" is the smallest unit constituting the dot. . The "point of the dot" is composed of the smallest unit "printing point" that can be printed by the printing equipment.

The "geographic information embedding code" refers to the distribution of its lattice mode, according to the distribution of its different positions, the distribution of different directions, the distribution of different shapes, the points of different size dots, the points of different number of dots, A dot pattern in which information is distributed by means of a concentrated and scattered distribution of points, called a geometric information embedded code.

The "physical information embedding code" refers to the distribution of its lattice mode, the distribution of different modulation modes, the distribution of phase modulation modes, the distribution of different modulation results, the distribution of different propagation directions, and the distribution of different frequencies. , the distribution of different colors, the distribution of different gray levels, etc. to record the dot matrix pattern of information, called the physics information buried code.

The "gradation characteristic of the screen dot" refers to the characteristic of uniformizing the gray scale of the dot of the screen, that is, the characteristic of the number of printed dots of the screen dot having the same composition, and the gray value of the screen dot is minimized. Characteristics.

The "size characteristic of the screen dot" means that the dots of all the dots of the screen dot are characterized by the number of dots of the printed dots being minimized, and the size of the mesh dots is minimized.

The "interval feature of the screen dots" refers to the characteristics of arranging the dots of the screen at a certain interval, and the interval of the screen dots is larger than the size of the screen dots.

The "arrangement characteristic of the screen dot" refers to an arrangement characteristic in which the two-dimensional matrix arrangement of the screen dots of the screen is rotated by 45 degrees. The "information embedding method" refers to a method in which the screen coding is arranged in a two-dimensional matrix form to form a shading, and the formed shading and the printed image data are superimposed, so that information can be buried in the area of the printed image. . Here, it is divided into three ways according to the requirements of the specific application: One is the color-differentiated embedding method, that is, the color of the screen coding is different from the color of the printed image, for example, the screen code is black K version, and the printed image is C, M, In the Y version, since the screen is encoded as an independent color, the code value of the screen code can be correctly recognized even if it is completely coincident with the printed image. The other is the screen encoding priority embedding method, that is, when some screens of the screen encoding coincide with the dots of the printed image, since the screen-encoded dots have priority, the dots of the printed image are directed to the screen code. Moving nearby, so that even if the screen code is the same as the color of the dots of the printed image, it can be distinguished in space, so the code value of the screen code can be correctly recognized. Another type is the printing image dot-point embedding method, that is, when some screen dots of the screen image and the dots of the printed image coincide, since the dots of the printed image have priority, the screen-coded dots are directed to the dots of the printed image. Moving nearby, even if the screen code is the same as the color of the dots of the printed image, it can be distinguished in space, so the code value of the screen code can be correctly recognized.

The "screen encoding" refers to a code that recognizes possible information recording and information embedding in consideration of the characteristics of the printed screen having a geometric or physical distribution pattern.

The "visual model" refers to the visual characteristics of the human eye, including the visual characteristics of the human eye mixing different colors, the visual characteristics of the dot size, the visual characteristics of the dot distribution direction, etc. The visual model is the theory of the characteristics of the printed screen. The basis is consistent with the characteristics of the printed screen.

The "visual characteristics in which different colors are mixed" means that when a large-area printing color on a printing medium is added to another small-area color, the human eye is difficult to recognize the color of a small area.

The "visual characteristics of the dot size" refers to the size or dot spacing of the dots having a diameter of less than 0.1 mm according to the calculation of the Rayleigh criterion, which is the size or dot spacing of the dots which are invisible to the naked eye.

The "visual characteristics of the distribution direction of the dot" refers to the arrangement of the dots. If the column is set to 9 Q degrees and the horizontal line is set to Q degrees, the arrangement of the dots is most easily perceived by the human eye, but if Rotating the ranks by 45 degrees is a feature that is difficult for the human eye to feel.

The "point or network point of the distribution reference network point" refers to a position of at least one network point or network point in the screen coding or screen coding information module, and has a position distribution of the screen coding or screen coding information module. One or more geometric distribution reference information of the reference information, the direction distribution reference information, the dot size reference information, the phase distribution reference information, or the propagation direction distribution information, or a dot of a dot or a dot of the physical distribution reference information.

The "information embedding method of different modulation methods" refers to an AM screen, that is, an AM screen, by changing the size of different screen dots to represent the gray scale of the printed screen dots. Printing by changing the number of different screen outlets The method of grayscale of the screen dot is the FM screen, that is, the FM screen. For screens with the same gray value, information can be recorded by different modulation methods. As a result, the screen characteristics of the network points do not change. The way of information recording and information embedding is called information recording and information of different modulation methods. Buried method.

The dot matrix mode is formed according to different modulation methods, and it can also be considered that the dot matrix mode is composed of a plurality of frequency components. The form of the lattice distribution is the same as the dot matrix of the different modulation modes described above. For example, the dot matrix distribution of the AM screen can be regarded as a low frequency dot matrix mode, and the dot matrix distribution of the FM screen can be Consider a high frequency dot matrix mode.

The dot matrix mode is formed according to different modulation modes. Since the dot of the dot pattern of the AM screen is distributed by a plurality of small dots, the number of dots of the mesh of the AM screen is relatively small, and the gray of one dot is gray. The degree is larger. On the other hand, since the dot of the lattice mode of the F M screen is distributed by a plurality of small dots, the number of dots of the mesh of the F M screen is relatively large, and the gray value of each dot is small. According to the reason, the dot matrix mode according to different modulation modes can also be said to be a dot matrix mode composed of dots of different number of dot points, or a dot matrix mode composed of dots of dots of different gray values, or It is a lattice mode composed of a concentrated distribution of points of a dot and a distributed distribution. Whatever the argument, the form of the lattice pattern distribution is identical and therefore falls within the scope of the present invention.

The "identifiable screen coding" is a code form in which information is embedded in a printed image independently in a certain code form.

The iconic screen coding is different from the strip screen coding and the two-dimensional screen coding. The former is a code that exists independently. For example, the one-dimensional barcode or the two-dimensional barcode which is widely used at present is an identification code, as long as the code is used. Once identified, an action can be taken. The latter is to perform an operation after identifying the entire image or the entire page of the print. The two are very close in many ways.

The method for information embedding and information identification of a printed image of the present invention is implemented on an information embedding device and an information recognizing device, and the method comprises the following steps:

In the information embedding device, image data as an object of information embedding and additional information to be buried briefly are read;

Arranging through the information module group to form shading image data;

The read image data is coincident with the shading image data for outputting new image data, and the new image data output is further capable of outputting only shading image data, wherein the output of the new image data is formed by at least one form; In the information recognition device, the partial or overall information of the print medium in which the additional information is embedded is read by the image sensor to embed the image data;

Embedding the read information into image data to perform at least one image processing including brightness processing or binarization processing;

The recognition result is output.

The characteristic of the printing screen is that the screen spacing of the screen coding is greater than or equal to the dot spacing characteristic of the displacement field of the screen coding network dot; the AM screen arrangement or the FM screen arrangement is respectively performed according to the dot arrangement of the printing precision screen. At least one of the dot arrangement characteristics of the screen-coded dots arranged in a 45-degree rotation manner.

The code value of the information module group code value of the identification screen screen is code verification performed by adding or multiplying the screen code value, and performing at least one of the same code check or parity check mode.

The information embedding method of the screen-coded information module group is a method in which a shading formed by a screen-coded information module group overlaps with a printed image, and at least a method of embedding information in a gap of the printed image a way.

In the lattice embedding code which is a geometrical pattern that recognizes the characteristics of the printing screen at the same time, it means: in the dot pattern configuration of the screen encoding, the distribution of the lattice is distributed through different positions, through different The direction distribution, through the distribution of different shapes, through the concentration and dispersion of the lattice, through the distribution of the number of different lattices, at least one of the distribution forms of the code.

The information embedded in the code as a physics that can simultaneously recognize the characteristics of the printed screen means: In the dot pattern configuration of the screen coding, the distribution of the lattice is distributed by different phase modulation modes. Through the distribution of different modulation results, the distribution through different modulation methods, the distribution through different frequencies, the distribution through different propagation directions, at least one of the distribution forms of the code.

The LED illumination in the information recognition device is a structure that receives light between light guiding materials, so that the LED illumination does not directly receive light.

The electronic circuit in the information identification device comprises an image sensor connected to the multimedia microprocessor, and the multimedia microprocessor is respectively connected with an SD card, an operation button, a USB, an LED display, a sound input amplifier and a sound output amplifier, and respectively connected to the microphone and Loudspeaker

It also includes a power supply for connecting an image sensor, a lighting device, a multimedia microprocessor, an SD card, an operation button, a USB, an LED display, a sound input amplifier, and a sound output amplifier.

The LED light guiding material is a light guiding material made of plexiglass coated with a fluorescent paint. The input image data described in the information embedding and information identification method of the printed image, and the screen coding information module embedded in the code by the identifiable geometric or physics information having the characteristics of the printed screen simultaneously The shading image information of the group is superimposed and outputted, and then printed by the printing device to form information embedded in the printing medium, or only the image data of the output shading image is printed, and the printed matter is pasted onto the corresponding area of the printed printed matter to constitute information Embedded in the print medium, at least one of the information embedded in the print medium is embedded in the print medium.

Example

Hereinafter, the application example of the information embedding and information identification method of the printed image of the present invention on the printing medium will be further described in detail with reference to the accompanying drawings, but is not limited to the embodiment.

In the method of information embedding and information recognition of a printed image of the present invention, first, a screen code as additional information is embedded in the print image information, and is carried out in the information embedding apparatus.

Fig. 1 is a flowchart showing the processing of the information embedding device. As shown in Fig. 1, the image data acquisition step reads additional information to be embedded in the print medium. The reading method can be read directly from a recording medium such as a memory or a hard disk, or can be taken out from the printer driver.

The screen coding conversion step converts the additional information embedded in the printed image into a geometrically or physically distributed information record of the pattern recognition having the characteristics of the printed screen and the screen coding information module of the information embedding code group. Here, in order to minimize the number of dots constituting the screen coding, the number of screen coded dots is set to 1. Thereby, the dot gray value is also minimized, so that the quality of the printed image in which the information is buried is not lowered.

In the screen-coded dot arrangement of printing accuracy below 1200 dpi, since the size of each dot is above 0.42 mm, which is close to the size recognized by the human eye, the arrangement of the screen-coded information module group should be considered AM. The form of the banner screen, that is, the individual outlets should be arranged as neatly as possible. At this time, the interval of the screen coded dot should be set to be larger than the size of the screen coded dot. When the information is recorded according to the different positions of the screen coded dot, since the distribution of the screen coded dot is random, according to the information content, the screen The interval between coded dots is larger than the random distribution of screen coded dots. The randomness of the distribution of the undercut dots is smaller, and the mesh coded dots are arranged to be more neat. Therefore, there is an advantage that the quality of the printed image after embedding the information is not lowered.

In the screen-coded dot arrangement of printing accuracy above 1200dpi, since the size of each dot is below 0.44mm, the size of the dot and the spacing of the dot matrix are in accordance with the Ruili criterion, which is an unrecognizable size of the human eye, so the screen The arrangement of the coded information module group should consider the form of the FM frequency modulation screen. At this time, the interval of the screen coded network dot can be set to be smaller than the size of the screen coded dot, and when the information is recorded according to different positions of the screen coded dot, Although the distribution of the screen coded dot is random, according to the information content, even if the interval of the screen coded dot is smaller than the random distribution of the screen coded dot, the random distribution of the textured dot is relatively large, but The overall screen effect will not appear I feel uncomfortable. Thus, there is still an advantage that the quality of the printed image after embedding the information is not lowered.

The shading image data constructing step comprises forming a shading image data data by the above information module group. Here, the print image data is shading image information composed of an information module group arranged in the order of the play field; a portion other than the corresponding portion, or an unrelated screen code is buried or nothing is buried, and any of them is selected. One is for processing.

The new image data output step, or the image data input above and the shading image data are superimposed and output, or only the shading image data is output, and any one of the new image data is output.

2 is a flow chart showing the processing of the information identifying apparatus. The image information reading step is performed in the information recognition device, and the image data of the print medium in which the additional information is embedded is read by an image sensor such as an image scanner or a CMOS sensor.

The image processing step is an image brightness processing for controlling the brightness of the image sensor by controlling the brightness of the image to control the brightness of the image to a certain value, and performing binarization processing of the image.

The code value identification step extracts the network point describing the additional information and identifies the code value of the code.

The recognition result output step outputs the above recognition result.

The smaller the number of dots based on the dot, the better the gray value of the dot is, and the smaller the effect of the embedding result on the printed image, the smaller the characteristics of the printed screen. As shown in Fig. 3, the distribution is shared by the information module group. The reference point, or a method of constructing a 4-digit multi-bit screen coding in which the dot is set to 1 is proposed by dot-distributing the distribution reference point.

The screen coding of the screen coded network dot number shown in FIG. 3 is set to 1. In Fig. 3, 301 is set as an information point; 302 is set as a 4-digit multi-bit screen coding with a dot number of 1; 303 is defined as a distributable area of the information point 301. The information point 301 records information by geometrically different positional distributions or by different angular distributions formed by the center of the distributable area 303. It is also conceivable to record information by different shapes.

For example, in FIG. 3, the dot pattern of (a) can be set to a multi-bit value of 0; the dot pattern of (b) can be set to a multi-bit value of 1; the lattice mode of (c) can be set to The multi-bit value 2; (d) the dot pattern can be set to a multi-bit value of 3; the dot pattern of (e) and (f) can be set to the position reference dot pattern constituting the position information.

According to the definition of the information recording efficiency of the number of bits of information that can be recorded by one site, the screen coding information recording efficiency shown in Fig. 3 is 2, that is, a dot matrix can record 2 bits of information.

In the present embodiment, as shown in FIG. 3, for the example of the screen coding in which the number of dots is set to 1, as shown in FIG. 4, the distribution of the information points 301 of the screen coding may be considered as passing. A different distribution pattern of physics containing phase modulation in two dimensions to record computer information.

The image data of the square normalized grid of the interval T formed by the plurality of screen dot information points 301 of the matrix distribution is set to {m, _n }, and the phase modulation method of the screen coding is as follows:

Formula 1 Φτη,η二Km, w){[z + £(m, n)} *T,[j + S(m, n)} * Τ]

Here, phase modulation of the propagation signal { ζπι, η} is achieved by changing ε (m, n ) and δ ( _m , n ).

According to the above formula, the information point 301 converted to screen coding is set to (m, n); the computer information is set to ω (ω ε 0 , 1, ■■■, k ). Then as shown in Figure 4: 401 is m = - 1, n = 1; 402 is m = 1, n = 1; 403 is m = l, n = - 1; 404 is m = - l, n = - l .

The dot pattern shown in Fig. 3 can be regarded as recording computer information by different distribution patterns of physics in phase modulation in two dimensions. The advantage of this method is that the physics method due to phase modulation As long as there is an initial position point, the phase relationship of all the lattices can be derived, so that the number of position reference points can be saved.

Similarly, for the dot pattern shown in Fig. 3, it is also conceivable to record computer information by different physical position patterns of the physics in the two-dimensional space.

As shown in the dot matrix mode of Fig. 3, for the distributable area 303 of the information point 301, since there are 10 distributable areas, at least 0 to 7 octal information can be recorded. Since the processing capability of the microprocessor of the playback device is considered, and the cost of the product and the function are both satisfied, the information groups of 0 to 3 are generally recorded using four different positions of the dot matrix mode as shown in FIG. Meet the needs of use, and can get higher recognition accuracy.

Referring to the example of FIG. 3, by expanding the distributable area 303, more different positions, angles, phase modulations, and propagation directions of the distribution information points 301 can be used to form a multi-bit screen coding of hexadecimal or higher hexadecimal or higher. .

FIG. 5 is an example of a dot distribution in the form of a screen-coded information module group. As shown in FIG. 5, a plurality of screen codes are used as an information module group based on the screen characteristics, and a matrix distribution is performed by using a 4-digit multi-bit screen code set with the number of dots shown in FIG. The screen of the screen encodes the dot distribution. 501 is set as the information point; 502 is set as the screen code of the number of dots 1; 503 is set as the position at which the information point 501 can be distributed.

As shown in FIG. 5, in the information module group, SH, S _{1 2} , S _{1 3} , S _{1 4} , S _{1 5} and S _{1 6 are taken} as the main vertical reference point lines; s ₂₁ , S ₃₁ , S ₄₁ , S 5 and S ₆ as main horizontal reference point columns; s ₄₂ , s ₄₃ , s ₄₅ and s ₄₆ as sub-vertical reference point lines; S ₂₄ , S ₃₄ , S ₄₄ , S ₅₄ and S ₆₄ as vice Horizontal datum point column.

Here, the main vertical reference point lines SH, S _{1 2} , S ₁₃ , S ₁₄ , S ₁₅ and S _{16 are} compared with the sub-vertical reference lines S ₄₂ , s ₄₃ , s ₄₅ and S ₄₆ , and the SH network points are distributed in the positive In the middle; s ₄₁ dots are distributed on the far right; s ₄₄ dots are distributed on the far left. In addition, the main horizontal reference point columns s ₂₁ , S ₃₁ , S ₄₁ , S ₅₁ and S ₆₁ and the sub-level reference point column s ₂₄ , S ₃₄ , 3 ₅₄ and 3 ₆₄ comparison, the main horizontal reference point columns S ₂₁ , S ₃₁ , S ₅₁ and S _{61 are} distributed at the leftmost side of the halftone dot; the sub horizontal reference point columns S ₂₄ and S ₃₄ are distributed at the positive Middle; S ₅₄ and S ₆₄ dots are distributed on the far right. The difference between the main vertical reference line and the sub vertical reference line and the main horizontal reference point and the sub horizontal reference point can be identified as the direction information of the information module group.

S S S S S S S S S S S S

S ₆₂ , S ₆₃ , S ₆₅ and S _{66 are} set as screen coding of each 2-bit information, and 32-bit information can be recorded using these 16 screen codes.

When the form of the additional information is taken as the print medium coordinates, it means S ₂₂ , S ₂₃ , S ₂₅ , S ₂₆ , S ₃₂ , SS ₃₅ , S ₃₆ , S ₅₂ , S ₅₃ , S ₅₅ , S ₅₆ , S ₆₂ , S ₆₃ , S ₆₅ and S ₆₆ coordinate values of each multimedia print. Error correction or verification processing can be performed by using a feature in which the coordinate values around the dot are a certain value.

When the form of the additional information is used as the sequence information of the print media playing area, s ₂₂ and S ₂₃ , S ₂₅ and S , S ₃₂ and S ₃₃ , S ₃₅ and S ₃₆ , and S and S , S and S and S and S show the sequence values of the corresponding regions as their respective same values. Error correction or verification processing can be performed by using two features having the same value of the corresponding halftone points.

Historically, in order to correctly identify the dot, the size of the dot, based on the sampling theory, requires more than 2 times the size of the printed dot. As shown in FIG. 5, S ₂₂ and S ₂₃ , S ₂₅ and S ₂₆ , S ₃₂ and S ₃₃ , S ₃₅ and S _{36 of} the constructed information module group,

The values of S ₅ ^PS ₅₃ , S ₅ PS ₅₆ , S ₆₂ and S ₆₃ and S ₆₅ and S ₆₆ are the same, so even if the size of each dot is used as the size of the printing dot, based on the sampling theory, the screen encoding can be correctly identified. The code value of the screen code.

As shown in FIG. 5, the information module group is composed of 6 rows and 6 columns, and since the first and middle two reference point rows or the reference point columns of each of the 6 rows and 6 columns are distributed, if any 6 rows are detected by the image sensor, The screen code of the X6 column screen can identify the code value of the code of the information module group.

When identifying information points, the image sensor can recognize any given X line because two reference points must be needed on both sides.

The condition of the screen encoding of the Xx column (x = l, 2, 3. . . n) is that the diameter of the image sensor detection area needs to be more than twice the width of the reference point row or the reference point column.

Therefore, if two reference lines or reference point columns are provided in the first and middle of the screen coding matrix of the X row Xx column, the read area is minimized.

The information module group shown in Figure 5 minimizes the read area. A maximum of 32 bits of information can be recorded for an area of only 2 mmX 2 mm. In addition, for every 1 information point, information of 2 bits or more can be recorded.

In addition, when the information point is set to 4 rows x 4 columns for the conventional method, it is necessary to set 9 rows x 9 column points containing dots. According to the present invention, if the same condition is used, only the commonalization of the reference point and the dot gradation characteristic of the printing screen are set. Set the dot matrix of 6 rows x 6 columns. Therefore, the overall gradation value of the shading formed by the information module group shown in FIG. 5 is lower, so that no uncomfortable feeling is generated for the printed matter.

Further, the reference point of the information module group shown in FIG. 5 is based on the dot spacing characteristics of the printing screen, and SH, S _{1 2} , S _{1 3} , S _{1 4} , 5 _{1 5 ,} and 5 _{1 of the} main horizontal reference point column. _6. S _{2 1} , S _{3 1} , S _{4 1} , 5 ₅₁ and 5 ₆ ι of the main horizontal reference point row S ₄₂ , S ₄₃ , S ₄₅ and S ₄₆ , S of the sub-level reference point column ₂₄ , S ₃₄ , S ₄₄ , S ₅₄ and S ₆₄ are all set as the dot screen of the printing screen. The advantage is that the quality of the shading formed by the information module group is better than the traditional method.

In addition, in the setting of the information module group shown in FIG. 5, when the printer prints on the 600 dpi printer, according to the Ruili criterion theory, the dot matrix of the dot is easy to be seen by the eye, so the printed screen is better than the amplitude modulation screen. , both AM screens. Based on the dot spacing characteristics of the printed AM screen, the dot spacing is larger than the dot size formed by the dot settable area, ie IA

. The advantage is that the phenomenon of random distribution of the shading formed by the information module group is small, so the quality of the shading is better than the conventional distribution method.

In addition, the screen coding shown in Fig. 3, regarding the distribution of the screen-coded information points 201, records the computer information by the different distribution patterns of the physics included in the two-dimensional spatial phase modulation. For the dot shown in FIG. 5, since the phase modulation result of other dot can be obtained if the initial dot coordinates are clear, the information module group of FIG. 5 can be improved by reducing the number of reference dots as shown in FIG. Efficiency.

As shown in FIG. 6, when the code value encoded by the screen is recognized, the initial information of the phase modulation of the halftone points can be used to calculate the characteristics of the code values of the respective network points, thereby forming a new information module group. In FIG. 6, in the information module group, S ₃₁ , S ₃₂ , S ₃₃ , S _{34 ,} and S _{1 5} are vertical reference point lines, and S ₁₃ , S ₂₃ , S _{43 ,} and S ₅₃ are horizontal reference point columns.

Similarly to the image group shown in Fig. 4, S _u , S ₁₂ , S ₁₄ , S ₁₅ , S ₂₁ , S ₂₂ , S ₂₄ , S ₂₅ , S ₄₁ , S ₄₂ , S ₄₄ , S ₄₅ , S ₅₁ , S ₅₂ , S ₅₄ and S ₅₅ are screen codes each representing 2-bit information. Using these 16 screen codes, 32 bits of information can be recorded.

Here, in order to distinguish the horizontal reference point row and the vertical reference point row, and the direction of the information module group, the distribution reference point of S ₃₃ is distributed as the right side.

In addition, since the characteristics of the information recorded by the dot phase modulation are utilized, the code values of the respective screen codes can be identified using a horizontal reference dot column and a vertical reference dot row.

Secondly, the present invention provides a method for solving the problem of print interference check in the dot matrix mode.

First of all, the so-called print interference grid pattern is the interference pattern that occurs when multiple regular patterns are overlapped. Here, the printing interference check phenomenon caused by the difference between the number of lines in the dot pattern and the number of printed lines of the printer and the printing machine is considered.

The number of lines of parallel lines is defined as L _N . When the number of lines L _NL and any two parallel lines of L _N2 coincide, the frequency of interference plaid Rate P

Formula 2

P _m = IL _nl - L _{n 2} I can be derived from this formula. According to the above formula, the interfering lattice period T _m is as follows, which is the reciprocal of the interference grid frequency.

Formula 3

1

τ _m ―

"' IL _nl - L _{n 2} I The conclusion of the above formula is that when the parallel line modes are two coincident, in order to avoid interference grating, the interference grid frequency must be set to ο. That is, the line number difference is very small, interference The lower the plaid frequency, the longer the interfering plaid period is, and the resulting interference plaid is not very noticeable.

Another point of view is that a stable interference-free lattice state is formed by rotating the angles of the two sets of lattices by 45 degrees.

The difference between the number of lines in the dot matrix mode and the number of printed lines in printers and printers is due to the fact that the dot pattern is the pitch of the dot pattern calculated based on the ideal number of lines of the printing press. result. However, the reality is that because of the error in the number of printer lines such as printers and printers, when the shading is printed by the dot pattern, interference plaque often occurs.

In the present embodiment, for the problem of the interference check pattern which often occurs when printing using a normal printer, in order to control the minimum range, an example of the screen coding of the new dot pattern which is rotated by 45 degrees in the distribution direction of the dot is formed. .

As shown in Fig. 7, 701 is used as an information point, 702 is used as a 45-degree rotated 4-digit multi-bit screen coding with a dot number distribution of 1, and 703 is used as a distributable area of the information point 701. In Fig. 7, the dot pattern of (a) is used as the multi-bit value 0, the dot pattern of (b) as the multi-bit value 1, and the dot pattern of (c) as the dot matrix of the multi-bit value 2, (d) The mode is a dot pattern of multi-bit values 3 and (e) as a dot pattern constituting position information and a dot pattern of (f) as a dot pattern constituting direction information.

Similarly, according to the definition of information recording efficiency, the information recording efficiency of the screen coding as shown in FIG. 7 can be calculated as 2. Similarly, the information point 701 of FIG. 7 is distributed by geometrical different positions or by the distributable area 703. The center and the information point 701 connect the lines at different angles to record information. In addition, it is also conceivable that the information point 701 records information for other information points through different shapes.

Further, in the same manner as the screen coding shown in Fig. 3, in Fig. 7, the information point 701 records information on the center of the distribution point 703 and the connection line of the information point 701 by geometrically different angles.

In the present embodiment, as with the screen coding shown in FIG. 3, an example of the screen coding with the number of dots shown in FIG. 7 is shown in FIG. 8, and the information dot of the screen coding rotated by 45 degrees is shown. The distribution of 701 can also be considered as recording computer information by different modes of physics of phase modulation of two-dimensional space.

By formula 1, in the 45-degree rotated screen coding, the information point 701 coordinates are set to (m, η), and the computer information is set to ω (ω e 0 , 1, ■■■, k ), as shown in the figure 8 shows that 8 0 1 is 11 = 0, n = 1; 8 0 2 is m = l, n = 0; 8 0 3 is m = 0, n = - 1; 8 0 4 is m = - l, n = 0.

As with the screen coding shown in FIG. 3, for the dot pattern shown in FIG. 7, the advantage of the method of recording computer information by the different distribution patterns of the phase modulation physics included in the two-dimensional space is that when As long as the initial state information of the dots is utilized, the phase values of the respective dots can be identified, so that the number of distribution reference points can be reduced.

Similarly, the dot pattern shown in Fig. 7 can also be considered to record computer information by a different physics distribution pattern in the direction of radio wave transmission in a two-dimensional space.

Similarly to the screen coding shown in FIG. 3, referring to the example of the screen coding shown in FIG. 7, the distributable area 703 is enlarged, and the different positions, directions, and phase modulations of the distributed information points 701 can also constitute a hexadecimal. Or multi-bit screen coding above 32.

In addition, since the screen coding shown in Fig. 7 is that the dots are distributed at 45 degrees, the print interference gradation can be controlled to a minimum.

FIG. 9 shows that a plurality of screen codes are used as an information module group based on the screen characteristics, and then matrix is performed by using a screen format of a 4-digit multi-bit 45-degree rotation of the number of dots shown in FIG. An example of distributing the distribution of screen coded dots that constitute the shading. 901 is used as an information point, 902 is a position where the information point 901 can be distributed, and 903 is a 45-degree screen coding with a point number of 1.

As shown in FIG. 9, in the information module group, S _{3 1} , S _{3 2} , S _{3 3} , S ₃₄ and S _{35 are} used as vertical reference point rows, and S ₁₃ , S ₂₃ , S ₄₃ and S _{53 are} used as horizontal reference. Point column.

Here, similar to the information module group shown in FIG. 5, the vertical reference points S _{3 1} , S _{3 2} , S _{3 3} , S ₃₄ and S ₃₅ and the horizontal reference point lines S ₁₃ , S ₂₃ , S ₄₃ and S after comparing ₅₃ can be seen, S outlets ₃₃ distributed in the lower left corner to the main difference between the different vertical reference point and the main line of the horizontal reference point sequence, as well as the direction information module group.

In addition, for each of the mesh points s _u , s ₁₂ , s ₁₄ , s ₁₅ , s ₂₁ , s ₂₂ , s ₂₄ , s ₂₅ , s ₄₁ , s ₄₂ , s ₄₄ , s ₄₅ , s ₅₁ , s ₅₂ , And S ₅₅ can record 2 bits of information, so an image module group is the same as the information module group shown in FIG. To record 32 bits of information.

Similarly to the information module group shown in FIG. 5, when the form of the additional information is used as the coordinates of the printing medium, it means S _u , s ₁₂ , s ₁₄ , s ₁₅ , s ₂₁ , s ₂₂ , s ₂₄ , s ₂₅ , s ₄₁ , s ₄₂ , s ₄₄ , s ₄₅ , s ₅₁ , s ₅₂ , s ₅₄ and s ₅₅ coordinate values of respective areas of the print medium. Error correction or verification processing can be performed by using a feature in which the coordinate value near the halftone is a certain value.

Similarly to the information module group shown in FIG. 5, when the form of the additional information is used as a sequence of the playback area of the print medium, as s _u and s ₁₂ , s ₁₄ and s ₁₅ , s ₂₁ and s ₂₂ , s ₂₄ and The corresponding dot values of s ₂₅ , s ₄₁ and s ₄₂ , s ₄₄ and s ₄₅ , s ₅₁ and s ₅₂ and s ₅₄ and s ₅₅ are the same, and the same features of the dot values can be used for error correction or verification processing.

According to the sampling theory, it must be twice the size of the printed dots, but as shown in Fig. 9, the information module groups s ₂₂ and S ₂₃ , S ₂ PS ₂₆ , S ₃ ^PS ₃₃ can be configured by screen coding. The corresponding dot values of S ₃ PS ₃₆ , S ₅ ^PS ₅₃ , S ₅ PS ₅₆ , s ₆₂ and s ₆₃ and s ₆₅ and s ₆₆ are the same, so even if the size of each dot is used as the size of the printed dot, The sampling theory can still correctly identify the code values of the screen coding.

As shown in Fig. 9, the pattern mode group is originally composed of 5 rows and 5 columns, but since it is rotated by 45 degrees, it becomes 9 rows and X9 columns.

The information module group shown in Fig. 9 is the same as the information module group shown in Fig. 5, and the read area is minimized. For an area of only 2.12mm X 2.12mm, 32-bit information can be recorded.

In addition, in the distribution of the information module group shown in FIG. 9, according to the dot spacing characteristic of the printing screen, the spacing of the dots is larger than the size of the dots formed by the dots of the dots, that is,

( I eo / 2 ) ^{1 / 2} > (W ₉ . Ten W ₉ . ₂ ² ) ^{1 / 2}

Here, I _{9 is} set. i = I ₉ . ₂ .

The advantage is that the random distribution of the shading formed by the information module group is small, so the quality of the shading is superior to the traditional distribution method.

Next, an embodiment in which the screen coding of the rotation of 45 degrees proposed in the present invention can cope with the effect of the print interference check problem will be described.

Figure 10, the printing device uses the Canon C 1 (made by Canon), the paper uses Japanese paper 1 2 8 g / m ² and the Japanese paper 8 1. 4 g / m ² , the screen coding method uses the above Figure 3 Or, in the dot pattern shown in Fig. 5, the respective results are as shown in Fig. 10, and a print interference check phenomenon occurs, so that the appearance of the printed matter is not good.

Figure 11 uses the same printing device as above, Nippon Paper 1 2 8 g / m ² and Nippon Paper 8 1.4 g / m ² and Figure 45 or Figure 9 rotated 45 degree screen encoded dot matrix The mode, the respective printing results are shown in Fig. 11, there is no printing interference check phenomenon, and the appearance of the printed matter is also good. Hereinafter, a multimedia printing system will be described as an example of a processing flow of an information embedding device, an information embedding method, an information recognizing device, an information recognizing method, an information embedding program, an information embedding program, and an information embedding printing medium.

The specific processing flow of the information embedding apparatus will be described with reference to Fig. 12 .

In the input step (S1), the print image data and the additional information to be buried in the print medium are input. Therefore, the method of inputting the print image information can be directly read from an electronic data recording device such as a memory or a hardware, or the printed image information can be read by a method of emulation printing from the drive of the printer.

In the screen encoding conversion step (S2), the input additional information to be embedded in the printing medium is converted into a gradation characteristic according to the printing screen dot, a size characteristic of the printing screen dot or a printing network. At least one of the spacing characteristics of the screen dots, the alignment characteristics of the screen dots, has the characteristics of the printing screen, and the pattern recognition may be geometric or physical information recording and the screen encoding of the information embedding code.

Here, it is also possible to embed the optically readable information having the screen characteristics at the same time as the information embedding code which is simultaneously recognized by the pattern having the screen characteristics. That is, the meaning of the pattern recognition possible information embedding code is the same as the optically readable information embedding code.

Further, in this step, for the screen coding which is a possible information embedding code for the pattern recognition having the screen characteristics at the same time, according to the gradation of the characteristics of the printing screen, the number of screen dots or the gray scale of the screen is encoded. All are minimized and uniformized.

The information module group is constructed in step (S3), and the transformed screen is encoded into a group of information modules by a matrix distribution method. The information module group can be used to embed the coordinate information of the printing medium, and can also embed the sequence information of the corresponding playing area of the printing medium, and further can also embed the tracking information including the title, author and creation time of the document in the printing medium. Automatic reading of information from electronic documents of documents, etc.

The distribution of the information module group is used for each screen-coded network dot having the same gradation, and the screen gradation is larger as the overall gradation of the printing screen is shallower, and the read area is restricted in consideration of practical applications. The dot spacing of each screen encoding can be set to a value more than twice the dot size. Here, the dot size value is defined as the range of regions in which information points can be distributed.

The buried area extraction step (S4), for the input print image data, as shown in FIG. 13, when the additional information is used as the sequence information of the corresponding play area in the print medium; the buried range should be defined as corresponding to the need to play Multimedia image data area; The outline of the image of each corresponding area can be extracted. For example, in FIG. 13, for the print medium 1301, as each image area of the multimedia data to be played by each of (1), (2), (3), (4), (5), and (6), it is buried. And each of the corresponding multimedia that you want to play in each image area The image sequence value is used as the multimedia playback value. That is, the sequence value of each play area in the print medium is taken as additional information of the play value of the multimedia.

As shown in Fig. 14, when the additional information is used as the coordinates of the printing medium, the matrix distribution area of the information module group for recording the coordinates of each printing medium can be extracted. For example, as shown in Fig. 14, each coordinate information 1402 of the print medium 1401 is buried in the play area 1403 in the print medium.

In addition, as shown in Fig. 15, for printed image information such as a document, the gap area of each document may be extracted first, and the additional information may be buried in the gap of the document. For example, in Fig. 15, for the printing medium 1501, (1), (2), (3), (4), (5), and (6) can be used as the gap regions of the respective documents.

In the information embedding step (S5), the following different information embedding methods are performed by the three uses of Fig. 13, Fig. 14, and Fig. 15 .

For each image area to be played as shown in Fig. 13, the screen encoding information module group which is converted as the image sequence information of the playback value can be distributed to the corresponding area in order. Buried in the corresponding area with the same number of cyclic codes.

For the area other than the playback area, in order to make the balance of the gradation of the entire texture uniform, it is conceivable to embed the code encoded by the screen other than the multimedia playback value. In addition, it is not necessary to embed the screen coding for areas outside the corresponding area.

When the information embedded in the object as shown in Fig. 14 is used as the printing medium coordinates, the screen encoding information module group for recording the X or y information of the printing medium coordinates can be distributed as the corresponding area.

When the additional information is embedded in the document gap as shown in FIG. 15, the composition tracking information of the specified file or the electronic file of the document is converted into the screen-coded information module group as an automatic reading information, and then passed. The same size shading image information as the gap between the corresponding documents is buried in the document gap.

For the matrix distribution of the screen coding, when the screen coded color is set to black and white, the shading setting is also black. For the original. The black, Κ version of the printed image data of M, Y, and , is black by C, M, and Y colors, and the shading of the screen code is treated as a black Κ version.

When the screen code is buried as color information, based on the visual model, the color of each screen code of the shading formed in the step (S5) is determined according to the color around the screen code. For example, when the color around the screen code is white, the screen coded color can be set to yellow.

The advantage of embedding screen coding as color information is that it has the least impact on the image quality of the printed image data.

In the output step (S6), the shading image may be overlapped with the printed image subjected to color processing, and the new print image data may be output through the plate making data of the ordinary printing machine; or the printer or the ordinary printing machine may be directly used. The brush is embedded in the print medium.

In addition, it is also possible to output only the shading formed by the screen encoded image group, or to superimpose the shading image with the printed image subjected to color processing to form new printed image data, which is passed through a general printing machine. The plate-making data is output, or the printing paste which forms the shading is printed directly by using a printer or a general printing machine, and the printing paste is attached to the existing printed matter to constitute a multimedia printed matter.

Next, the detailed processing contents of the screen code recognizing device, and the processing steps of the screen code recognizing device according to the present embodiment will be described with reference to FIG.

Image data reading step (S1) The image sensor is used to read all or part of the image data embedded in the printing medium.

In the binarization step (S2), binarization processing is performed on the image read above.

Here, in order to improve the processing speed of the program, the illumination portion of the image sensor module is in a uniform illumination state as much as possible. In addition, by detecting the illumination brightness of the image sensor by detecting the CMOS sensor, the illumination brightness of the image sensor is controlled according to the brightness value thereof. Fixed value.

In the reference point extraction step (S3), first, the center reference point where the row and the column of the reference point intersect is extracted, and then the dot matrix of each of the reference point rows or the reference point column is extracted according to the constituent rule of the reference point row or the reference point column. .

In the step of calculating the screen code value (S4), the code value of each information point is calculated by the position information of the relevant reference point line or the reference point sequence, and then the code value of the screen coding information module group is obtained. Or use the reference point as the initial value of the phase modulation, calculate the phase modulation result of each information dot matrix by the phase modulation algorithm, and calculate the code value of each screen coding, and calculate the code value of the screen coding information module group.

In the code value output step (S5), the code value of the screen-coded information module group calculated above is output.

As an example of the circuit configuration of the screen code recognition device, as shown in Fig. 17, the image sensor is connected to the multimedia microprocessor, and the multimedia microprocessor is connected to the SD card, the operation button, the USB, the sound input amplifier, and the sound output amplifier, respectively.

In addition, the power supply is connected to an image sensor, a lighting device, a multimedia microprocessor, an SD card, an operation button, a USB, a sound input amplifier, and a sound output amplifier.

The sound input amplifier is connected to the microphone, and the sound output amplifier is connected to the loudspeaker.

Here, the image sensor shown in Fig. 17 will be described in detail as shown in Fig. 18 as follows.

In FIG. 18, a CMOS image sensor is placed on the image sensor substrate 1801, a lens 1803 is placed between the CMOS image sensor 1802 and the printing medium 1806, and an image sensor cover 1805 made of a light guiding material such as plexiglass is used. LED lighting 1804. On the print medium 1806, the LED illumination 1804 is not directly exposed to light, Light is received between light materials. The advantage is that the printing medium can be as uniform as possible, so that the algorithm for binarizing the read image is simple, and the image processing speed of the microprocessor can be improved.

The information relating to the present embodiment is embedded in the printing medium, and can be produced by the following two methods.

One of the methods for forming the information embedded in the printing medium: using the information embedding device, the input print image data is superimposed on the texture formed by the information processing by the screen coding, and printing or plate-making is performed until the creation is completed. Print media embedded in information.

As shown in FIG. 19, the information embedding device is used for the printed matter that has been printed in advance, and the information is buried by the screen coding with reference to the content of the printed matter that has been printed in advance. The shading which is processed and formed is printed as a sticker, and the sticker is pasted onto a corresponding area of the printed matter which is printed in advance, and another printing medium in which the information is embedded may be formed.

The advantage is that the printed matter can be made into a buried medium.

In the LED display portion of the information recognition device relating to the present embodiment in Fig. 17, from the viewpoint of both aesthetics and visibility, a scheme of adding a light guide plate for a display lamp is proposed, as shown in Fig. 20.

In FIG. 20, the right side surface 2002 and the left side surface 2003 of the organic glass light guide plate 2001 are subjected to light reflection plating, and then mounted on the printed circuit board 2007 by applying a fluorescent paint on the lower surface 2004 of the organic glass light guide plate 2001. The light of the LED illuminator 2005 is reflected by the right surface reflection surface 2002 of the plexiglass light guide 2001 and the left reflection surface 2003, and is then illuminated by the fluorescent material coated on the bottom of the plexiglass to cause the light guide plate to emit light. It is characterized by a larger illumination area than an LED-only lamp and a high brightness.

The possibility of industrial use:

According to the present invention, the following application examples are explained by the method of embedding the information of the proposal into the printing medium.

In Fig. 21, an example of a multimedia print including a photo album and a teaching material is exemplified.

Using the above information embedding device, the screen code as the playback value is embedded in each of the related playback areas including the print image data of the photo album, the textbook, and the like.

Further, multimedia playback data corresponding to each playback value is attached as a database to the above information recognition apparatus to constitute a multimedia playback apparatus.

With the multimedia playback device, by clicking on a predetermined area of the multimedia print, the multimedia play data of the corresponding area can be played.

In the conceptual diagram of another application example of the multimedia printed matter shown in FIG. 22, the information embedding device is used for the printed matter including the photo album, the teaching material, and the like printed in advance, and the image data of the printed matter such as the photo album and the teaching material is used. Setting a corresponding pasting pattern on each of the set playing areas, and then embedding the playing value through the information embedding method of the screen encoding on the corresponding pasting pattern, and then pasting the embedded information Out.

Each of the adhesives embedded with the information is attached to the corresponding area of the above printed matter to constitute a multimedia printed matter.

In addition, the respective playback values and the multimedia playback data corresponding to the playback values are transmitted to the information recognition device by the method of downloading, the USB method, and the SD card to constitute the multimedia playback device.

With the multimedia playback device, by simply pasting the paste pasted on the multimedia print, the multimedia play data corresponding to the multimedia play value embedded in the paste can be played.

A processing program having a repeating function can also be added to the multimedia playing device, and a multimedia playing device having a repeating function can also be constructed. The processing steps of the multimedia playing device having the repeating function are:

(1) a step of reading a printed image of the printed image data in which the information is embedded by reading an image of the printed image in which the information is embedded by the image sensor of the dot pen;

(2) identifying a code identification step of embedding code values in the embedded image data with pattern recognition possible geometric or physical information embedded in the image data;

(3) adding a pointer of the multimedia data corresponding to the identified code value to the repeat data storage step in the complex read data memory in a list form;

(4) Repeat the multimedia repeat playback step of playing the multimedia data according to the list stored in the repeat data memory.

With the multimedia playback device having the repeat function, the corresponding multimedia play data can be repeatedly played back by clicking on the print image pasted on the multimedia print or embedded with the multimedia play value.

Secondly, applications for automatic registration of handwritten documents and large hand-drawn drawings.

For example, according to the method of Fig. 14, the coordinate information of each page and the information of the number of pages can be embedded in the notebook, so that each page of the notebook has coordinate information and page number information. When a pen having a screen-coded information recognizing device is used to write on the transcript, the image sensor of the screen-encoded information recognizing device reads the screen-encoded image having the coordinate information on the pen tip, and then recognizes it by the microprocessor. The screen code value, that is, the coordinate value of the pen tip, is registered in the memory, and the position of the pen tip can be tracked, and all the tracking information is transmitted to the computer. The text recognition OCR engine can convert the document handwritten on the notebook into a text code. Write the text written on the notebook directly to the computer.

Regarding the conventional parity check method, at least one dot in the screen coded information module group is used as a parity checkpoint to perform parity check; as long as the parity of the code value of the identified code is checked and parity The situation of the dot parity is compared to determine whether the identified code is correct. The method of adding data verification is described as follows:

Set the data pattern of the screen encoding multi-bit code to A, the data matrix to D and 0, 1, ···,Α-1, (i formula 4

The data value of the data matrix D can be calculated by:

V = d _u * A° + d ₁₂ * A ¹ ten... ten d _ln * A ¹¹ - ¹ + d ₂₁ * Α ^π + d ₂₂ * A ⁿ⁺¹ ten... ten d _2n * A ² " ^-1 +

···+ d _ml * A ^(m — ¹⁾ⁿ + d _m2 * A ^(m — ¹⁾ⁿ⁺¹ +~+ d _mn * ATM— ¹ Let Yi be initially 0, then add demold code check The value R ^a is;

!■=1 =i

Here,

y ij' ≥A ; y ij' -A

y ij'<A; y ij' The multiplication demold code verification method is introduced as follows:

Let the data pattern of the screen encoded multi-bit code be A, the data matrix be D and = 0, 1, ~, A-1, (i 1,2, -, m, j = 1, 2, -, η), γ _; initial value is 1, and the multiplication demodulation code check value R ^m is obtained by the following equation (7);

Here, y ij'<A; y ij' In multiplication demolding, the product of Y i may be greater than several times the value of the modulo A, so as in equation (7), it is sometimes necessary to subtract the complex modulo. Y i = Y i -A in equation (7) means that the subtracted digital modulo A is set back to ij Y i until Y i <A.

The addition and subtraction code verification method for addition multiplication is introduced as follows:

According to the theory of conditional probability, let A be the value of the digital modulus. The probability of the additive demolding check and the multiplication demolding error check is 1/A ² respectively. If the addition mode check and multiplication are used at the same time, The two verification methods are tested, and the probability of false verification is 1/A ⁴ , which greatly improves the calibration accuracy.

For example, the addition check method of the screen coding of the digital mode is 8:

The addition code modulo value R ^a is added by Equation 5-6;

4 4 Here,

For example, a multiplication check method for a screen code of 8:

The multiplication of the modular code check value R ^m by the formula 5, 7 is;

i=\ j=\

Here,

Γ Y ij'≥8; y _; -8→ y

Y ij

L Y ij' <8 ; Y i

Fig. 23 is a diagram showing an example of another dot matrix mode. As shown in Figure 23; 2301 is a centralized network, 2302 is a dispersed network, The computer information can be recorded by different concentrated and dispersed distributions, and the gray values of the two kinds of dots are the same, and therefore, the evenly distributed shading can be formed. The 2301 and 2302 network points can also be regarded as the network points of different dot arrays, and can also be regarded as the network points with different frequency distributions, different amplitude modulation network points and frequency modulation network points.

Figure 24 is an illustration of a dot pattern in different directions. As shown in Figure 24; horizontal direction a can represent data 1, left oblique direction b can represent data 2, vertical direction c can represent data 3, and right oblique direction d can represent data 4.

As shown in FIG. 25, the characteristics of the information recorded by the phase modulation of the halftone dot can also constitute a 4*4 dot matrix information module group when identifying the code value of the screen coding. In Fig. 25, in the information module group, S _{3 1} , S _{3 2} , S _{3 3} , and S _{3 4} are vertical reference point lines, and S ₁₃ , S _{23 ,} and S ₄₃ are horizontal reference point columns.

Similarly to the image group shown in Fig. 4, S _u , S ₁₂ , S ₁₄ , S ₂₁ , S ₂₂ , S _{2 4} , S _{4 1} , S _{42 are} used as screen coding sites each representing 2-bit information, S _{4 4} As a check digit, 16-bit information can be recorded using these 8 screen codes. If 8 bits of information are recorded using each of the screen-coded dots around the screen, then 8 pieces of information can record 32 bits of information.

Fig. 26 shows an example of a multi-bit screen coding mode group having a 4*4 dot matrix rotated by 45 degrees.

As shown in FIG. 26, in the information module group, S _{3 1} , S _{3 2} , S _{3 3} , and S _{3 4 are} used as vertical reference point lines, and S ₁₃ , S ₂₃ , and S _{43 are} used as horizontal reference point columns.

Here, as in the information module group shown in FIG. 5, the vertical reference point lines S _{3 1} , S _{3 2} , S _{3 3} , and S _{3 4} and the vertical level reference point lines ≤ ₁₃ , S ₂₃ , S ₄₃ and It can be seen from S ₅₃ that the dot of S ₃₃ is distributed in the lower left corner to distinguish the difference between the main vertical reference point row and the main horizontal reference point column, and the direction information of the information module group.

In addition, 2-bit information can be recorded for each of the mesh points S _u , S ₁₂ , S ₁₄ , S ₂₁ , S ₂₂ , S ₂₄ , S ₄₁ and S ₄₂ , and S _{44 is} used as a check processing bit. Therefore, 8 information lattices can record 16 bits of information.

Furthermore, the information module group can be composed not only of 4*4 dot matrix, 5*5 dot matrix, 6*6 dot matrix, but also by 4*5, 5*6,

A 9*9 dot matrix and a matrix of any number of rows and columns. The arrangement direction of the information module group dots may be a horizontal rotation direction, a 45-degree rotation direction, and an array of various lattice forms in any direction of rotation.

Claims

Claim

A method for information embedding and information identification of a printed image, the method being implemented on an information embedding device and an information recognizing device, the method comprising the steps of:

In the information embedding device, image data as an information embedding object and additional information that is briefly buried are read;

Arranging through the information module group to form shading image data;

Identifying the geometrically or physics information of the pattern that is simultaneously printed with the characteristics of the printed screen, and identifying the coded network code of the network coded network code;

The recognition result is output.

2. The method of information embedding and information identification of a printed image according to claim 1, wherein: the characteristic of the printing screen means that the dot spacing of the screen encoding is greater than or equal to the displacement field of the screen encoding dot. The dot spacing characteristic; the AM screen arrangement or the FM screen arrangement is respectively performed according to the dot arrangement of the printing precision screen coding, and at least one of the dot arrangement characteristics of the screen coding dot arranged by the 45 degree rotation is arranged. .

3. The method of information embedding and information identification of a printed image of a printed image according to claim 1, wherein: the code value of the code module group coded by the identification screen is encoded by a screen. Code verification by at least one of the addition or multiplication, the same code check, or the parity check mode.

4. The method of information embedding and information identification of a printed image of a printed image according to claim 1, wherein the information embedding method of the screen-coded information module group is information encoded by a screen. Module group The method of superimposing the formed texture on the printed image, at least one of the methods of embedding information in the gap of the printed image.

5. The method of information embedding and information identification of a printed image according to claim 1, wherein: embedding the code as information that is possible to recognize the pattern of the printing screen characteristic simultaneously means: In the lattice pattern of screen coding, the distribution of the lattice is distributed through different positions, distributed through different directions, distributed through different shapes, distributed through the concentration and dispersion of the lattice, and distributed through the number of different lattices. , at least one of the distribution forms of the code.

6. The method of information embedding and information identification of a printed image according to claim 1, wherein: embedding the code as information physics that is possible to recognize the pattern having the characteristics of the printing screen means: In the dot pattern configuration of screen coding, the distribution of the lattice is distributed through different phase modulation modes, through the distribution of different modulation results, through the distribution of different modulation methods, through different frequency distributions, through different propagations. In the distribution of directions, at least one of the distribution forms of the code.

7. The method of information embedding and information identification of a printed image according to claim 1, wherein: the LED illumination in the information recognition device is a structure that receives light between the light guiding materials, so that the LED illumination is not directly Received light.

8. The method of information embedding and information identification according to claim 1, wherein: the electronic circuit in the information recognition device comprises an image sensor connected to the multimedia microprocessor, and the multimedia microprocessor is respectively connected to the SD card. , operation buttons, USB, LED display, sound input amplifier and sound output amplifier, and respectively connected to the microphone and the microphone; also includes the power supply respectively connected to the image sensor, lighting device, multimedia microprocessor, SD card, operation button, USB, LED display, sound input amplifier and sound output amplifier.

9. The method of information embedding and information identification of a printed image according to claim 7, wherein: the light guiding material for LED illumination is a light guiding material made of organic glass coated with a fluorescent paint.

10. An application for information embedding and information recognition of a printed image on a printing medium, characterized in that: the input image data described in the method of information embedding and information recognition of the printed image, and At the same time, the shading image information composed of the screen coding information module group of the identifiable geometric or physics information of the printed screen characteristic is superimposed and outputted, and then printed by the printing device to create information embedded in the printing medium, or only Printing and outputting the image data of the shading image, and pasting the printed matter onto the corresponding area of the printed printed matter, constituting the information embedded in the printing medium, and at least one of the information embedded in the printing medium is buried in the printing medium. .