CN115600627A - Color two-dimensional code generation method - Google Patents
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Abstract
The invention provides a color two-dimensional code generation method, which comprises the following steps: the method for identifying the positioning area, the information area and the function area comprises the following steps: s1: respectively inputting data in the identification positioning area, the information area and the function area, and respectively converting the data to generate a binary control flow, wherein the binary information flow in the information area is set as Qx; s2: dividing Qx into two parts of Qa and Qb, wherein Qa is divided into four information flow areas, and Qb is divided into four information flow areas; s3: grouping eight information stream areas of Qa and Qb in S2 in pairs according to a sorting mode, and merging the information streams; s4: judging the information flow areas in Qa and Qb by using a judging unit; s5: combining all the color codes into a color two-dimensional code; by dividing the information flow area and combining the information flow area into the color two-dimensional code, the two-dimensional code information of the color two-dimensional code can be prevented from being lost completely due to partial fading or damage.
Description
Technical Field
The invention relates to the field of two-dimensional codes, in particular to a color two-dimensional code generation method.
Background
The two-dimension code records data symbol information by using black and white figures which are distributed on a plane according to a certain rule by using a certain specific geometric figure; the concept of "0" and "1" bit stream forming the internal logic basis of computer is used ingeniously in coding, several geometric forms correspondent to binary system are used to represent literal numerical information, and can be automatically read by means of image input equipment or photoelectric scanning equipment so as to implement automatic information processing.
Under the background of the era of rapid development of the internet and continuous upgrading of mobile terminals, two-dimensional codes are widely applied to various aspects of daily life of people nowadays as a communication technology which can realize rapid information processing by recording data information through geometric figures and using related equipment. However, most of the existing two-dimensional codes are in a uniform black and white square shape, the style is single, and sufficient attraction to audiences is difficult to generate visually.
Disclosure of Invention
In order to solve the problems that the existing color two-dimensional code is easy to lose all information due to fading, the amount of carried information is limited and the like, the invention provides a color two-dimensional code generation method to more exactly solve the problems.
The invention is realized by the following technical scheme:
the invention provides a color two-dimensional code generation method, which is characterized by comprising the following steps: identifying a positioning area, an information area and a function area, the method comprises the following steps:
s1: respectively inputting data in an identification positioning area, an information area and a function area, and respectively converting the data to generate a binary control stream, wherein the data code comprises all information of an input character string, the binary information stream of the information area is set to be Qx, the information stream comprises an N-bit binary code, and N is greater than 0;
s2: dividing Qx into two parts of Qa and Qb, wherein Qa is divided into four information flow areas which are named as black lattice a, blank B, black lattice C and blank D in sequence, and Qb is divided into four information flow areas which are named as black lattice A, black lattice B, blank C and blank D in sequence;
s3: grouping eight information stream areas of Qa and Qb in S2 in pairs according to a sorting mode, and merging the information streams;
s4: judging the information flow areas in Qa and Qb by using a judging unit, judging whether the combined color codes belong to the same color code, judging whether the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code, and generating a plurality of color two-dimensional codes if the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code;
s5: and combining all the color codes into one color two-dimensional code.
Further, the positioning area is provided with a storage code element and a bearing code element, the storage code element is used for recording the color number and the coding rule of the two-dimensional code, and the color number enables the information flow to generate a plurality of information code elements with a plurality of colors; and the carrying code element is used for recording that the two-dimensional code belongs to a carrying state.
Further, the generating of the data code comprises data analysis, data coding, generating of an error correction code sequence and constructing information.
Further, the data analysis is to analyze and process the acquired character string types, and the result obtained by the data analysis is to perform binary coding on different types of input data to obtain a binary bit stream composed of 0 and 1.
Further, an algorithm used in the generation of the error correction code sequence is an R-S forward error correction control code algorithm, error correction coding of 4 gradients is adopted in the generation process to perform error correction processing on the data coding, the 4 gradients correspond to 4 error correction levels, which are respectively represented by L, Q, M, H, error correction and detected error correction capacities corresponding to the 4 levels are continuously increased, and the restored errors can be a read-reject error and a substitute error, the read-reject error is a determined error for an error position, the substitute error is a type of error position where an error position is determined, correction of the substitute error needs 2 times of error correction code words to be realized, and a number relationship between the error correction code and the substitute error is:
e+2t≤d-p
wherein: e is the number of read rejection errors; t is the number of substitution errors; d is the number of error correcting code words; p is the number of error detection codes.
Furthermore, the structure information is that the generated sequence is put into blocks in sequence under the condition of specification determination, each block is calculated to obtain a corresponding error correction code word block, and the error correction code word blocks form a sequence in sequence and are added behind the original data code word sequence.
Further, the judging unit includes a color code replacing unit, and when the plurality of color codes combined in S4 belong to the same color code, the color codes are replaced with other black lattices or white lattices.
Further, the functional area includes a color sorting unit, and after merging the information streams in Qa and Qb, the information streams are respectively in one-to-one correspondence to four color areas according to color sorting, and the colors of the four color areas are sequentially set as: blue, yellow, red, green.
The invention has the beneficial effects that:
according to the method for generating the color two-dimensional code, the information flow areas are divided and combined into the color two-dimensional code, so that the two-dimensional code information of the color two-dimensional code can be prevented from being completely lost due to partial fading or damage, and when information is lost in a certain area of the color two-dimensional code due to various reasons, only the information of corresponding color is lost; before data coding, the size of an information code element can be preset according to the color quantity, and the size of the information code element can be preset according to the identification capability of market mainstream hardware; adjusting or selecting the size of the information code element according to the identification capability of market mainstream hardware; thus, when generating the two-dimensional code, the size of the information code element can be flexibly set, thereby adjusting the capacity of the color two-dimensional code.
Drawings
FIG. 1 is a schematic flow chart of a color two-dimensional code generation method according to the present invention;
Detailed Description
In order to more clearly and completely explain the technical scheme of the invention, the invention is further explained by combining the attached drawings.
Referring to fig. 1, the present invention provides a method for generating a color two-dimensional code.
In the present embodiment, the present invention includes: identifying a positioning area, an information area and a function area, the method comprises the following steps:
s1: respectively inputting data in an identification positioning area, an information area and a function area, and respectively converting the data to generate a binary control stream, wherein the data code comprises all information of an input character string, the binary information stream of the information area is set to be Qx, the information stream comprises an N-bit binary code, and N is greater than 0;
s2: dividing Qx into two parts of Qa and Qb, wherein Qa is divided into four information flow areas which are named as black lattice a, blank B, black lattice C and blank D in sequence, and Qb is divided into four information flow areas which are named as black lattice A, black lattice B, blank C and blank D in sequence;
s3: grouping eight information stream areas of Qa and Qb in S2 in pairs according to a sorting mode, and merging the information streams;
s4: judging the information flow areas in Qa and Qb by using a judging unit, judging whether the combined multiple color codes belong to the same color code, judging whether the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code, and generating multiple color two-dimensional codes if the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code;
s5: and combining all the color codes into a color two-dimensional code.
Inputting information data in a positioning area, an information area and a function area respectively, converting the data to generate binary control flows respectively, assuming that all the information flows are Qx, the information flows comprise N-bit binary codes, N is greater than 0, dividing the Qx into two parts of Qa and Qb, and grouping the eight information flow areas into two groups: the black lattices a and A are marked as a first group, the spaces B and B are marked as a second group, the black lattices C and C are marked as a third group, and the spaces D and D are marked as a fourth group; the color of the two-dimensional code corresponding to the first group is blue, the color of the two-dimensional code corresponding to the second group is yellow, the color of the two-dimensional code corresponding to the third group is red, and the color of the two-dimensional code corresponding to the fourth group is green; when the judgment unit judges the information stream areas combined in Qa and Qb, if a plurality of combined areas are blue, the black lattice a and the black lattice A are replaced by the black lattice C and the blank C to generate yellow, four groups of the black lattice a and the black lattice A are sequentially corresponding to corresponding colors, and a color two-dimensional code containing blue, yellow, red and green is generated, so that one color corresponds to the information stream of one area; when the content of the yellow information stream formed by combining the blank spaces B and the black spaces B is judged to be larger than the maximum capacity of the color two-dimensional codes, a plurality of yellow areas are generated, so that two, three or more color two-dimensional codes can be used for containing a long or ultra-long character, such as a Torstat corpus, a Shakespeare corpus, four well-known Chinese works and the like; when the information flow of the red area is blackened due to the ink, the information of the red area is lost, but the information of other three colors is not influenced, and the information of the two-dimensional code can be better retained in different areas.
In one embodiment, the positioning area is provided with a storage code element and a bearing code element, the storage code element is used for recording the color number and the coding rule of the two-dimensional code, and the color number is used for generating a plurality of information code elements with a plurality of colors from an information stream; and the receiving code element is used for recording that the two-dimensional code belongs to a receiving state. The number of basic colors in the color number is larger than 64 bits, and the number of basic colors is selected to be 16 levels, 32 levels, 64 levels or 256 levels and the like when encoding. Setting default basic color quantity during coding, and automatically selecting the basic color quantity according to the default value if the basic color quantity is not selected; for another example, the number of basic colors is automatically selected or a default value is automatically recommended according to the content of the stored information during encoding. For example, in a short text, the color two-dimensional code can be realized by using the basic color number of 3 levels, 8 levels or 16 levels, and as in an equivalent article, the color two-dimensional code can be realized by using the basic color number of 8 levels, 16 levels or 32 levels, and so on. Therefore, the operation of the user is facilitated, and the user experience is improved. Setting colors for the information code elements according to the number of the basic colors, namely referring to a display image according to the basic colors corresponding to the number of the basic colors, performing color matching on the information code elements, and outputting the identification area of the data to be coded; the method comprises the steps that before data coding, the size of an information code element is preset according to the color quantity, and the size of the information code element is preset according to the recognition capability of market mainstream hardware; adjusting or selecting the size of the information code element according to the identification capability of market mainstream hardware; thus, when the two-dimensional code is generated, the size of the information code element can be flexibly set, and the capacity of the color two-dimensional code can be adjusted. The positioning region sets a carrying symbol for recording that the two-dimensional code belongs to a carrying state, and the carrying symbol has a preceding two-dimensional code and a following two-dimensional code associated with the two-dimensional code, for example, four carrying states are preset: no context, with context. The carrying code element also sets a carrying indication which is used for recording the two-dimension codes before and after the carrying indication and guiding a user to know other related two-dimension codes before and after the two-dimension codes, so that long continuous loading can be realized; for another example, the holding code element is set in one or more positioning regions, and the holding code element further records a remote link for guiding a user to acquire a two-dimensional code associated with the user, so that the user can directly acquire related content, and the user experience is enhanced.
In one embodiment, the generating of the data code comprises data analysis, data coding, generating of an error correction code sequence, and constructing information. Data coding is firstly carried out data analysis, the type of the obtained character string is analyzed and processed, binary coding is carried out according to the analysis result to obtain a binary bit stream consisting of 0 and 1, after the data analysis, the data coding can be carried out according to different modes according to the type of the input character string, and if all the input character strings are numbers, the coding is carried out according to the digital mode; if each input character is a character of letter and number, coding is carried out according to an alphanumeric mode, and the value of the number is any integer between 0 and 44; in addition to these two modes, there are an octet mode, a kanji mode, a mixed mode and an FNC1 mode, and an appropriate mode is selected according to an input character string at the time of generation. Because the two-dimensional code is easily damaged in the forms of pollution, scratch and the like in the using process, an error detection and correction algorithm is carried out by using an error correction code, an R-S forward error correction control code algorithm is used, an R-S coding algorithm is added at the end position of a coded bit stream to code a long string of error correction code words, the two-dimensional code can be successfully decoded when being scratched or polluted, 4 error correction levels are respectively represented by L, Q, M, H in the generation process, the coding error correction capacity of L is about 7 percent, the L is relatively suitable for requiring the minimum generated coding size of a character string representing a given degree, M is a relatively suitable level, the error correction rate has smaller size and better reliability after being generated, Q is suitable for the generation of important two-dimensional codes and generates pictures with poor quality, H is a fault-tolerant coding mode with the highest error correction rate, the recovery of error information close to 30 percent can be realized, the recovered errors are reject errors and substitute errors, the reject errors are determined for error positions, the substitute errors are error correction types of 2 times, and the quantity of error correction codes is required to be corrected, and the error correction code words:
e+2t≤d-p
wherein: e is the number of read rejection errors; t is the number of substitution errors; d is the number of error correcting code words; p is the number of error detection codes.
For example: when the error correction level is set to H, 172 bits are required for encoding in total, 112 bits are used for error correction code words, and the data code words are the remaining 60 bits, and 112 error correction code words among them can correct 112 rejected errors or 112/2=56 substitute errors, the actual error correction percentage of the obtained two-dimensional code is 56/172=32.6%, which is not the error correction capacity ratio of 30% specified by "H" as the error correction rate.
Since the number of words that can be encoded is determined with a certain error correction level, the number of words in the final encoded bit stream should be equal to the number of words that can be encoded at the corresponding error correction level, but the length of the actual input character string does not necessarily match, in order to solve this problem, the input data character string sequence should be divided into n small blocks according to the specific error correction level, each small block is constructed into a corresponding error correction code word, and finally the error correction codes and the data of each block are assembled into the final bit stream according to the order, the rule of assembly is to encode the information of the data block 1 in the head bit stream of the bit stream, and then to connect the code word information of the data block 2 until the information of the last code word of the n data blocks.
In one embodiment, the determining unit includes a color code replacing unit, and when the color codes combined in S4 belong to the same color code, the color codes are replaced by other black lattices or white lattices. After the encoding is completed, information streams in Qa and Qb are combined, and if the combination of the black lattice a and the black lattice A generates blue, other areas also generate blue, which indicates that the combination of the areas is repeated and needs to be replaced by other areas, so that the generation of the two-dimensional code with multiple colors is ensured.
In an embodiment, the functional area includes a color sorting unit, and after merging the information streams in Qa and Qb, the information streams are respectively one-to-one corresponding to four color regions according to color sorting, and the colors of the four color regions are sequentially set as: blue, yellow, red, green. Grouping eight information stream areas of Qa and Qb in S2 in pairs according to a sorting mode, wherein the sorting mode is as follows: the black lattices a and A are recorded as a first group, the spaces B and B are recorded as a second group, the black lattices C and C are recorded as a third group, and the spaces D and D are recorded as a fourth group; the color of the two-dimensional code corresponding to the first group is blue, the color of the two-dimensional code corresponding to the second group is yellow, the color of the two-dimensional code corresponding to the third group is red, the color of the two-dimensional code corresponding to the fourth group is green, the sequence of the blank B and the black lattice B is not changeable, and the sequence of the black lattice C and the blank C is not changeable.
In another embodiment, the method for decoding the color two-dimensional code comprises the following steps:
s1: scanning according to the identification positioning area to obtain color two-dimensional code pixels;
s2: scanning and extracting color pixels in the color two-dimensional code pixels, and converting the color pixels to generate a new color binary information stream;
s3: processing the new color binary information stream according to the functional area information to obtain eight information stream areas of Qa and Qb;
s4: the information stream region of S3 is decoded to obtain the entire content of the information region.
The method comprises the steps of restoring information such as format, version and the like of the whole array according to the inverse process of a coding theory, carrying out exclusive OR operation on data code word blocks and error correction code block words according to version numbers in the restored format information, checking whether errors exist in data codes by combining error correction grade information and error correction codes in the obtained format information blocks, if errors are found, carrying out error correction processing on specific data code word blocks immediately, then partitioning the data bit streams by using mode indicators in the error-corrected data code bit streams according to rules corresponding to modes, checking whether the length of decoding character strings is the same as the number statistics of the words coded in the format information after decoding, and finally outputting a final decoding result.
Reading format information, and performing mask elimination processing on a mask version in the format information, wherein the elimination method is to perform exclusive or operation on an original array according to a mask condition of a mask information corresponding to a heavy value, and a comparison table is as follows:
encoding a representation value
Condition (mod represents the remainder after integer division)
000
（i+j）mod2=0
001
imod2=0
010
Imod3=0
011
（i+j）mod3=0
100
（（i/2）+（j/3））mod2=0
101
（i j）mod2+（i j）mod3=0
110
（（i j）mod2+（i j）mod3）mod2=0
111
（（i j）mod3+（i+j）mod2）mod2=0
The process is opposite to the encoding process, mask information is removed, each code word block is read according to the sequence, the code word blocks are arranged from the lower right corner of an encoding area during encoding, the information read by the code word blocks is also from the lower right corner, each code word bit stream is identified according to the obtained version number and the error correction level in the version information by combining the encoding theory, data and error correction code words of each block are read according to the sequence and are arranged into an ordered bit stream sequence, each code word block is rearranged into a bit stream column, the bit stream sequence comprises the data encoding information and the error correction encoding information, each error correction code block is used for rejecting errors or replacing errors in the data code block, the encoding information can be restored according to the encoding mode after error correction is finished, after all error correction is finished, character number statistical information of the segment is arranged behind different mode indicators, character restoration operation is carried out on each segment by using the mode indicators and the character number information, and the original encoding character string is obtained after restoration is finished. For example, when yellow in the color two-dimensional code is damaged, the green two-dimensional code can be scanned to acquire and restore information corresponding to the yellow two-dimensional code, so that the damage of the yellow two-dimensional code cannot cause information loss of other color areas, the effectiveness of the two-dimensional code is guaranteed, and the user experience is higher.
Of course, the present invention may have other embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative effort, and all of them are within the protection scope of the present invention.
Claims (8)
1. A method for generating a color two-dimensional code is characterized by comprising the following steps: identifying a positioning area, an information area and a function area, the method comprises the following steps:
s1: respectively inputting data in an identification positioning area, an information area and a function area, and respectively converting the data to generate a binary control stream, wherein the data code comprises all information of an input character string, the binary information stream of the information area is set to be Qx, the information stream comprises an N-bit binary code, and N is greater than 0;
s2: dividing Qx into two parts of Qa and Qb, wherein Qa is divided into four information flow areas which are named as black lattice a, blank B, black lattice C and blank D in sequence, and Qb is divided into four information flow areas which are named as black lattice A, black lattice B, blank C and blank D in sequence;
s3: grouping eight information stream areas of Qa and Qb in S2 in pairs according to a sorting mode, and merging the information streams;
s4: judging the information flow areas in Qa and Qb by using a judging unit, judging whether the combined color codes belong to the same color code, judging whether the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code, and generating a plurality of color two-dimensional codes if the content of the information flow of the information area is larger than the maximum capacity of the color two-dimensional code;
s5: and combining all the color codes into one color two-dimensional code.
2. The method for generating a color two-dimensional code according to claim 1, wherein the positioning region is provided with a storage symbol and a carrying symbol, the storage symbol is used for recording the number of colors of the two-dimensional code and the encoding rule, and the number of colors is used for generating a plurality of information symbols with a plurality of colors from the information stream; and the carrying code element is used for recording that the two-dimensional code belongs to a carrying state.
3. The method of claim 1, wherein the generating of the data code comprises generating and constructing information of data analysis, data coding, and error correction code sequence.
4. The method of claim 3, wherein the data analysis is an analysis of the type of character string obtained, and the result of the data analysis is used to binary code different types of input data to obtain a binary bit stream consisting of 0 and 1.
5. The method for generating a two-dimensional color code according to claim 3, wherein the algorithm used in the generation of the error correction code sequence is an R-S forward error correction control code algorithm, 4 gradients of error correction codes are adopted to perform error correction processing on data codes during the generation process, the 4 gradients correspond to 4 error correction levels, which are respectively represented by L, Q, M, H, and the error correction and detection error correction capacities corresponding to the 4 levels are continuously increased, so that the recovered errors can be a read-reject error and a substitute error, the read-reject error is an error whose error occurrence position is an uncertain error type, the correction of the substitute error needs 2 times of error correction code words to be realized, and the number relationship between the error correction code sequences is as follows:
e+2t≤d-p
wherein: e is the number of read rejection errors; t is the number of substitution errors; d is the number of error correcting words; p is the number of error detection codes.
6. A method for generating a two-dimensional color code according to claim 3, wherein the structure information is obtained by putting the generated sequences into blocks in sequence under the condition of specification, calculating each block to obtain the corresponding error correction code word block, and forming the error correction code word blocks into a sequence in sequence to be added after the original data code word sequence.
7. The method for generating a two-dimensional color code according to claim 1, wherein the determining unit includes a color code replacing unit, and when the combined color codes belong to the same color code in S4, the combined color codes are replaced with other black lattices or white lattices.
8. The method of claim 1, wherein the functional area comprises a color sorting unit, and after merging the information streams in Qa and Qb, the information streams are respectively in one-to-one correspondence to four color areas according to color sorting, and the colors of the four color areas are sequentially set as: blue, yellow, red, green.
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| CN117649172B (en) * | 2023-12-08 | 2024-05-03 | 中捷通信有限公司 | Data dynamic coding method and device for logistics monitoring object and electronic equipment |
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