CN107563477A - Quick Response Code and its generation method and device - Google Patents

Abstract

The present invention, which provides a kind of Quick Response Code and its generation method and device, the Quick Response Code, includes rim area, Quick Response Code code figure and clear area, and the Quick Response Code code figure includes format version information area, positioning area, correction zone and data message code area.Quick Response Code provided by the invention and its generation method and device, include the Quick Response Code of rim area, Quick Response Code code figure and clear area by design, the Quick Response Code code figure includes format version information area, positioning area, correction zone and data message code area, make two-dimension code label be partly contaminated or unfilled corner breakage in the case of, information therein can be still read, improves the robustness of two-dimension code label.

Description

Two-dimensional code and its generation method and device

technical field

The present invention relates to the field of information technology, in particular to a two-dimensional code and its generating method and device.

Background technique

With the rapid development of information technology, two-dimensional codes are widely used in daily life, such as information acquisition, website jump, advertisement push, anti-counterfeiting traceability, preferential promotion, member management, mobile payment and other fields. It can store more information and represent more data types, which is attracting more and more attention.

In the prior art, there are many types of two-dimensional codes, among which matrix two-dimensional codes (also known as checkerboard two-dimensional codes) are commonly used, which are coded in a rectangular space through different distributions of black and white pixels in the matrix. On the corresponding element position of the matrix, the appearance of a dot (square dot, dot or other shape) represents a binary "1", and the absence of a dot represents a binary "0". representative meaning. The matrix two-dimensional barcode is a new type of graphic symbol automatic reading and processing code system based on computer image processing technology and combined coding principles. The most representative matrix two-dimensional code is the QR code. The QR code is fast to read, square in shape, and only black and white. In 3 of the 4 corners, there is a smaller square pattern that looks like the word "Hui". These 3 patterns are used to help the decoding software to locate. The user does not need to align, and the data can still be read correctly regardless of the scanning angle. Therefore it is widely used.

However, the QR code in the prior art also has its own shortcomings and deficiencies, mainly due to its lack of strong robustness. It is difficult to read the information if one corner is damaged, and 100% cannot read the information when two corners are damaged, which will affect consumers' scanning and reading. Especially in the process of transportation and sales of agricultural products, two-dimensional code labels are more likely to be polluted or damaged. Therefore, it is very important to develop a more robust QR code.

Contents of the invention

(1) Technical problems to be solved

The object of the present invention is to provide a two-dimensional code and its generation method and device, which solves the problem that the information in the two-dimensional code label in the prior art cannot be read due to contamination or missing corners.

(2) Technical solutions

In order to solve the above technical problems, on the one hand, the present invention provides a two-dimensional code, including a border area, a two-dimensional code map and a blank area, and the two-dimensional code map includes a format version information area, a positioning area, and a correction area and data information coding area.

Further, the number of the format version information areas is at least three.

Further, the format version information area is located at the corner of the two-dimensional code.

Further, the format version information area includes at least one of row and column number information of the two-dimensional code, version type information, error correction level information and mask type information.

Further, the frame area is a black frame with a width of at least one module unit, which encloses the entire two-dimensional code pattern.

Further, the positioning area is composed of a row of horizontal positioning patterns and a column of vertical positioning patterns with a width of a module unit width alternately formed of black and white. The horizontal positioning patterns and the vertical positioning patterns are respectively located on the two-dimensional code map. Sixth row and sixth column.

Further, the correction area is composed of a "back"-shaped structure, and the "back"-shaped structure is formed by overlapping three black and white concentric squares.

Further, the blank area is surrounded by the outside of the frame area, and is composed of a white frame with a width of at least three module units.

In another aspect, the present invention provides a method for generating the above-mentioned two-dimensional code, including:

Receiving input data information, determining the coded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generating blank areas, frame areas, positioning areas and correction areas;

Encoding the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence;

Encoding the coded character type, the version type, the error correction level and the mask type to generate a format version information codeword sequence;

Mask processing is performed on the data information code word sequence to generate a data information coding area, and mask processing is performed on the format version information code word sequence to generate a format version information area.

In another aspect, the present invention provides a device for generating the above-mentioned two-dimensional code, including:

The input data analysis module is used to receive input data information, determine the encoded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generate blank areas, border areas, positioning areas and correction areas ;

A data information encoding module, configured to encode the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence;

A format version information encoding module, configured to encode the encoded character type, the version type, the error correction level, and the mask type to generate a format version information codeword sequence;

The masking module is configured to perform mask processing on the data information code word sequence to generate a data information coding area, and perform mask processing on the format version information code word sequence to generate a format version information area.

(3) Beneficial effects

The two-dimensional code and its generation method and device provided by the present invention, by designing a two-dimensional code including a frame area, a two-dimensional code map and a blank area, the two-dimensional code map includes a format version information area, a positioning area, a correction area and data information encoding area. The information in the two-dimensional code label can still be read even when the two-dimensional code label is partially polluted or the missing corner is damaged, which improves the robustness of the two-dimensional code label.

Description of drawings

FIG. 1 is a schematic diagram of a two-dimensional code structure according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a method for generating a two-dimensional code according to an embodiment of the present invention;

FIG. 3 is a specific flowchart of generating a two-dimensional code according to an embodiment of the present invention;

FIG. 4 is a specific flow chart of decoding a two-dimensional code according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of an apparatus for generating a two-dimensional code according to an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example 1:

FIG. 1 is a schematic diagram of a two-dimensional code structure according to an embodiment of the present invention. As shown in FIG. 1 , an embodiment of the present invention provides a two-dimensional code, including a frame area 10, a two-dimensional code map and a blank area 60, the The two-dimensional code diagram includes a format version information area 20 , a positioning area 30 , a correction area 40 and a data information encoding area 50 .

Specifically, the frame area 10 is used to protect the two-dimensional code image and assist the scanning software to locate the two-dimensional code and transform the coordinate system. The format version information area 20 includes the format and version information of the two-dimensional code and the like. The positioning area 30 is used to determine the coordinates of the modules in the two-dimensional code diagram. The correction area 40 is used to correct irregular image distortion. The data information coding area 50 is used to carry the information carried by the two-dimensional code, and is composed of a data code word and an error correction code word. The blank area 60 is located at the outermost circle of the entire two-dimensional code to protect the entire two-dimensional code.

Further, the number of the format version information areas 20 is at least three.

Specifically, the format version information area 20 includes the number of rows and columns of the two-dimensional code diagram, error correction level and mask information, and each of the format version information areas 20 includes complete format information, even if the two-dimensional Even if the code is missing or contaminated, it can still be read accurately as long as it contains a complete format information.

Further, the format version information area 20 is located at the corner of the two-dimensional code.

Specifically, the format version information area 20 is located at three corners of the two-dimensional code, and each corner contains complete format information.

Further, the format version information area 20 includes at least one of row and column number information of the two-dimensional code, version type information, error correction level information and mask type information.

Further, the frame area is a black frame with a width of at least one module unit, which encloses the entire two-dimensional code pattern.

Specifically, the frame area is a black frame module with a width of at least one module, which surrounds the entire two-dimensional code map, and generates a blank code map according to the version of the two-dimensional code. The circle is filled with black modules to generate a border. It is used to protect the two-dimensional code map and assist the scanning software to locate the two-dimensional code and transform the coordinate system. It replaces the position detection areas at the upper left, lower left and upper right corners of the QR code image in the prior art, releasing the space of the code image.

Further, the positioning area 30 is composed of a row of horizontal positioning patterns and a column of vertical positioning patterns with a width of a module unit width alternately formed by black and white. The horizontal positioning patterns and the vertical positioning patterns are respectively located on the two-dimensional code map. The sixth row and sixth column of .

Specifically, the horizontal and vertical positioning graphics are respectively one row and one column wide of one module. They are alternately composed of black and white modules, and the horizontal and vertical positioning figures are located between the two upper format version information areas 20, and their positions are the sixth row and the sixth column of the two-dimensional code diagram. Its function is to determine the coordinates of the modules in the QR code diagram.

Further, the correction area 40 is composed of a "back"-shaped structure, and the "back"-shaped structure is formed by overlapping three black and white concentric squares.

Specifically, each of the correction areas 40 can be regarded as three overlapping concentric squares, which are composed of 5*5, 3*3 and 1*1 black and white modules. The number of the correction areas 40 is determined by the version number of the two-dimensional code. Since the pattern of the correction area 40 can correct irregular image distortion, the pattern of the correction area 40 plays a very important role in the process of recognizing the new two-dimensional code.

Further, the blank area 60 is surrounded by the outside of the frame area, and is composed of a white frame with a width of at least three module units.

Specifically, the blank area 60 is an area around the two-dimensional code that is not less than three module units wide, and its reflectivity should be the same as that of the white module unit. It should be noted that since the blank area 60 is white, and the shading in FIG. 1 is also white, the blank area in FIG. 1 is not distinguished from the shading of the picture.

The two-dimensional code provided by the embodiment of the present invention is designed by designing a two-dimensional code including a frame area, a two-dimensional code map and a blank area, and the two-dimensional code map includes a format version information area, a positioning area, a correction area and data information The coding area enables the information in the two-dimensional code label to be read even when the two-dimensional code label is partially polluted or the missing corner is damaged, which improves the robustness of the two-dimensional code label.

Example 2:

Fig. 2 is a schematic diagram of a method for generating a two-dimensional code according to an embodiment of the present invention. As shown in Fig. 2, an embodiment of the present invention provides a method for generating a two-dimensional code in the above embodiment, including:

Step S10, receiving input data information, determining the encoded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generating blank areas, frame areas, positioning areas and correction areas;

Step S20, encoding the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence;

Step S30, encoding the encoded character type, the version type, the error correction level and the mask type to generate a format version information codeword sequence;

Step S40, performing masking processing on the data information codeword sequence to generate a data information coding area, and performing masking processing on the format version information codeword sequence to generate a format version information area.

Specifically, firstly, the input data stream is analyzed, and the coded character type and version error correction mode are determined. Two-dimensional codes have several different encoding modes, and these encoding modes make different character subsets convert to symbolic characters with different efficiencies. If the user does not specify a specific symbol and error correction version to use, the version that best matches the data should be selected by default.

Data loss or transmission errors are likely to occur during network transmission or image decoding. In order to ensure the integrity of the data, it is necessary to write redundant error correction codes at the encoding end, and divide the codeword sequence into blocks as required, so that the error correction codewords correspond to the data blocks. The error correction codeword is generated by the RS error correction algorithm, and the error correction codeword is added after the data codeword sequence. When the symbol is damaged, the complete data can be obtained through error correction.

Encoding the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence.

Construct the final data information codeword sequence as follows.

a. Divide the data codeword sequence into blocks according to the version and error correction level;

b. For each block of data codewords, respectively calculate the error correction codeword of the block;

c. The final sequence includes the data codeword and error correction codeword corresponding to each block.

The format version information area combines format information and version information into a data bit stream according to a certain assembly method, and fills in the three regions of the two-dimensional code map according to corresponding rules. The content of the format version information codeword sequence is as follows: a mask scheme including row number, column number, version information, error correction level and data information. Generate format version information code word sequence.

The purpose of adding mask information to the two-dimensional code map is to improve the reliability of reading the code, and to avoid the formation of the binary bit stream of the functional module of the correction area. According to the following steps, the purpose of the mask can be satisfied.

a. Do not use mask processing for functional graphics;

b. Carry out XOR operation between the data information and the designed 8 specific mask patterns;

c. Evaluate each result and select the graphic with the best effect.

The functional graphics include frame area, blank area, positioning area and correction area.

Finally, mask processing is performed on the data information code word sequence to generate a data information coding area, and mask processing is performed on the format version information code word sequence to generate a format version information area

Fig. 3 is the specific flow chart of generating two-dimensional code according to the embodiment of the present invention, as shown in Fig. 3, at first, the user first inputs coding information, and the system automatically judges whether to exceed the maximum version capacity of two-dimensional code; Carry out analysis, select an appropriate encoding method for information encoding, and select an appropriate version and error correction mode according to the size of the information; then encode the data information to form a data bit stream, and divide it into blocks according to the corresponding version; for For each block of data bit stream, the corresponding error correction codeword is generated by the RS algorithm; the error correction codeword is added after the data codeword sequence to form the final codeword sequence, including the generated data information codeword sequence and format version information Code word sequence, and fill it into the blank code map; finally, put format version information and corresponding error correction information in the three corners and mask; finally, mask the input data information code word sequence.

Fig. 4 is a specific flow chart of decoding a two-dimensional code according to an embodiment of the present invention. As shown in Fig. 4, the decoding method of a two-dimensional code is summarized as the following flow:

(1) In the decoding process of the two-dimensional code, first locate and identify the symbol image of the code map through the frame area;

(2) Read the format version information (remove the mask and complete the error correction of the format information, identify the error correction level and mask graphics), and then read the version information to determine the version of the symbol;

(3) Carry out XOR operation to the bitmap of the coded area with the mask pattern to remove the mask (the mask pattern has been drawn from the format information before);

(4) According to the module arrangement rules, read symbol characters, restore information data and error correction code words;

(5) detecting and correcting errors with error correction codewords corresponding to the error correction level information;

(6) divide the data codeword into a plurality of parts according to the mode indicator and the character count indicator;

(7) Decoding according to the corresponding mode to obtain information.

The method for generating a two-dimensional code provided in an embodiment of the present invention generates a two-dimensional code including a frame area, a two-dimensional code map and a blank area, and the two-dimensional code map includes a format version information area, a positioning area, and a correction area And the data information coding area, so that the information in the two-dimensional code label can still be read even when the two-dimensional code label is partially polluted or the missing corner is damaged, which improves the robustness of the two-dimensional code label.

Example 3:

FIG. 5 is a schematic diagram of a device for generating a two-dimensional code according to an embodiment of the present invention. As shown in FIG. 5 , an embodiment of the present invention provides a device for generating a two-dimensional code described in Embodiment 1, including an input data analysis module 100 , data information encoding module 200, format version information encoding module 300 and mask module 400, wherein,

The input data analysis module 100 is used to receive input data information, determine the encoded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generate blank areas, frame areas, positioning areas and correction areas ;

The data information encoding module 200 is configured to encode the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence;

The format version information encoding module 300 is used to encode the coded character type, the version type, the error correction level and the mask type to generate a format version information codeword sequence;

The mask module 400 is configured to perform mask processing on the data information codeword sequence to generate a data information coding area, and perform mask processing on the format version information codeword sequence to generate a format version information area.

The device for generating a two-dimensional code provided in an embodiment of the present invention generates a two-dimensional code including a frame area, a two-dimensional code map and a blank area, and the two-dimensional code map includes a format version information area, a positioning area, and a correction area And the data information coding area, so that the information in the two-dimensional code label can still be read even when the two-dimensional code label is partially polluted or the missing corner is damaged, which improves the robustness of the two-dimensional code label.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A two-dimensional code, characterized in that it includes a frame area, a two-dimensional code map and a blank area, and the two-dimensional code map includes a format version information area, a positioning area, a correction area and a data information coding area. 2. The two-dimensional code according to claim 1, wherein the number of the format version information areas is at least three. 3. The two-dimensional code according to claim 1, wherein the format version information area is located at a corner of the two-dimensional code. 4. The two-dimensional code according to claim 1, wherein the format version information area contains at least one of row and column number information, version type information, error correction level information and mask type information of the two-dimensional code . 5. The two-dimensional code according to any one of claims 1-4, wherein the frame area is a black frame with a width of at least one module unit, which encloses the entire two-dimensional code image. 6. The two-dimensional code according to any one of claims 1-4, wherein the positioning area is composed of a row of horizontal positioning patterns and a column of vertical positioning patterns that are alternately formed of black and white and whose width is the width of the module unit , the horizontal positioning pattern and the vertical positioning pattern are respectively located in the sixth row and the sixth column of the two-dimensional code image. 7. The two-dimensional code according to any one of claims 1-4, characterized in that, the correction area is composed of a "back"-shaped structure, and the "back"-shaped structure is composed of three black and white concentric Stacked squares. 8. The two-dimensional code according to any one of claims 1-4, wherein the blank area surrounds the outside of the frame area and is composed of a white frame with a width of at least three module units. 9. A method for generating the two-dimensional code according to any one of claims 1-8, comprising: Receiving input data information, determining the coded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generating blank areas, frame areas, positioning areas and correction areas; Encoding the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence; Encoding the coded character type, the version type, the error correction level and the mask type to generate a format version information codeword sequence; Mask processing is performed on the data information code word sequence to generate a data information coding area, and mask processing is performed on the format version information code word sequence to generate a format version information area. 10. A device for generating the two-dimensional code according to any one of claims 1-8, comprising: The input data analysis module is used to receive input data information, determine the encoded character type, version type, error correction level and mask type of the two-dimensional code according to the input data information, and generate blank areas, border areas, positioning areas and correction areas ; A data information encoding module, configured to encode the input data information according to the encoded character type, the version type and the error correction level to generate a data information codeword sequence; A format version information encoding module, configured to encode the encoded character type, the version type, the error correction level, and the mask type to generate a format version information codeword sequence; The masking module is configured to perform mask processing on the data information code word sequence to generate a data information coding area, and perform mask processing on the format version information code word sequence to generate a format version information area.