WO2016206446A1 - Procédé de codage de caractère et procédé de décodage de caractère ayant une fonction de correction d'erreur et produit associé - Google Patents

Procédé de codage de caractère et procédé de décodage de caractère ayant une fonction de correction d'erreur et produit associé Download PDF

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Publication number
WO2016206446A1
WO2016206446A1 PCT/CN2016/079114 CN2016079114W WO2016206446A1 WO 2016206446 A1 WO2016206446 A1 WO 2016206446A1 CN 2016079114 W CN2016079114 W CN 2016079114W WO 2016206446 A1 WO2016206446 A1 WO 2016206446A1
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WIPO (PCT)
Prior art keywords
character
error correction
data
characters
character encoding
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PCT/CN2016/079114
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English (en)
Chinese (zh)
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吴林
崔征
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信码互通（北京）科技有限公司
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Publication of WO2016206446A1 publication Critical patent/WO2016206446A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
    • G06V10/768—Arrangements for image or video recognition or understanding using pattern recognition or machine learning using context analysis, e.g. recognition aided by known co-occurring patterns

Definitions

  • the present invention relates to a character encoding method and a character decoding method having an error correcting function, and to a product using the above character encoding method.
  • OCR computer vision recognition technology
  • the accuracy rate can reach more than 90%.
  • the printing effect is better, and the recognition rate can reach more than 98%.
  • OCR technology itself has the possibility of misreading, and it is impossible to discriminate whether it is misread after OCR recognition.
  • the recognition system cannot distinguish whether or not the reading is wrong.
  • the existing character encoding containing only data characters due to the misunderstanding of OCR technology, the above application system is flawed, and it is impossible to use such character encoding as a mark for the production of some systems with high precision requirements.
  • the primary technical problem to be solved by the present invention is to provide a character encoding method with an error correction function.
  • Another technical problem to be solved by the present invention is to provide a character decoding method with an error correction function.
  • Another technical problem to be solved by the present invention is to provide a product using the above character encoding method.
  • a character encoding method with error correction function wherein the character encoding is composed of data characters and error correcting characters, and includes the following steps:
  • a character code having an error correction function is composed of data characters and corresponding error correction characters.
  • the character encoding table used in the step (1) includes a plurality of numbers and a plurality of letters, and different numbers and different letters represent different values.
  • the character encoding table does not include a letter whose shape is close to any of the numerical shapes.
  • the error correction algorithm used is the Reed Solomon algorithm.
  • the length of the data character is N
  • the number of characters to be error-corrected is T
  • the length of the character encoding is N+2T
  • 2T is the number of error-correcting characters
  • the error correction rate is T/(N+2T).
  • the character code consists of numbers and/or letters.
  • a character decoding method with error correction function wherein the character encoding is composed of data characters and error correction characters, including the following steps:
  • the error correction algorithm used in the step (2) and the step (3) is the Reed Solomon algorithm.
  • the length N of the data character and the length of the error correction character are calculated according to the error correction rate T/(N+2T) and the length of the character encoding (N+2T). 2T, then divide; where T is the number of characters required for error correction.
  • the product is a bottle cap, and the character code is disposed on the cap
  • the top surface, the character codes set on different caps are different.
  • a two-dimensional code is disposed inside the bottle cap, and the two-dimensional code disposed on each cap is different, and the two-dimensional code is associated with the character code in a database.
  • the character encoding method and the character decoding method provided by the present invention are used for encoding and decoding a character encoding having an error correction function.
  • This character encoding with error correction function consists of data characters and their corresponding error correction characters.
  • the use of such character encoding to mark the product can effectively solve the problem that the character encoding including only the data characters in the prior art is easily misunderstood.
  • the error correction algorithm performs error correction processing on the character encoding, and can determine whether there is an error in the recognition of the character encoding, and correct the character encoding in which the number of the wrong characters is less than or equal to the number of error correction characters corresponding to the error correction rate; False failed character encoding.
  • the number of error characters exceeds the number of error correction characters corresponding to the error correction rate, the erroneous characters in the character encoding cannot be completely corrected, but the recognition of the character encoding can also be determined by the error correction algorithm.
  • the error is guaranteed to be 100% rejected. Therefore, using this character encoding, it can be ensured that only correctly recognized data characters can be stored in the system, and 100% of the incorrectly recognized data characters are rejected, and there is no misreading data in the system.
  • FIG. 2 is a flow chart of a coding process of character encoding provided by the present invention.
  • FIG. 3 is a flow chart of a decoding process of character encoding provided by the present invention.
  • Figure 4 is a front elevational view showing a bottle cap provided with a character code
  • Figure 5 is a rear perspective view of the cap of Figure 4.
  • the character encoding method and the character decoding method provided by the present invention are used for encoding and decoding a character encoding having an error correction function.
  • a character code having an error correction function is composed of data characters and their corresponding error correction characters.
  • the decoding process by performing error correction processing on the entire character encoding, it can be determined whether the error correction of the character encoding is successful, thereby ensuring that only correctly decoded data characters can enter the database, and the error correction data (ie, recognition error and cannot The error corrected data) was rejected by 100%.
  • the coding principle of the character encoding is as follows:
  • the character code having the error correction function is composed of two parts: a data character and an error correction character. It is assumed that the error correction processing is performed by using the Reed Solomon algorithm, the number of data characters is N, and the number of characters to be error-corrected is T, the length of the character encoding is N+2T, and 2T is the number of error-correcting characters.
  • the corresponding error correction rate is T/(N+2T). For example, in the character encoding shown in FIG.
  • the length of the valid data character is 8
  • the length of the error correcting character is 4
  • the number of characters capable of error correction is 2
  • 100% misunderstanding can be found.
  • the error correction rate and the correct recognition rate are different, the misreading can also be found 100%.
  • the error correction character is data obtained by processing the data characters using an error correction algorithm. According to the actual needs, the number of characters that need to be corrected can be adjusted. If the error correction is 1 character or 3 characters, the length of the error correction character is also adjusted to 2 or 6.
  • any type of error correction algorithm can be used in the present invention as an error correction algorithm for the character encoding.
  • the commonly used Reed Solomon algorithm is used for error checking and error correction.
  • the Reed-Solomon algorithm please refer to the paper “Reed-Solomon Codec Principle and FPGA Implementation” by Zhou Zhu and Wang Rui (published in “Avionics Technology", No. 2, 2009), which is not specific here. I will go into details. Of course, other error correction algorithms can be selected as needed.
  • the character code with error correction function provided by the present invention may be composed of pure letters or pure numbers, or may be composed of numbers and letters.
  • the length of the character code can be freely defined as needed, generally 8 or more.
  • the character encoding method and the character decoding method provided by the present invention are described below by taking the character encoding table shown in Table 1 as an example.
  • the character encoding table shown in Table 1 is composed of 10 numbers and 22 uppercase letters, and includes 32 characters in total, and each character corresponds to a 5-digit binary number. When the character encoding includes 12 characters, the corresponding binary encoding length is 60 bits.
  • the letters B, I, O, and Q which are similar in shape to the easy-to-read error numbers 8, 1, 0 are not used. 32 characters after removing the above four letters The difference in shape is large, and the OCR device is easy to recognize and reduces the error rate.
  • the reduction, for example, the data length is 16, and the error correction data is 4, and the error correction rate is 2/20 10%.
  • Table 1 is a character encoding table corresponding to 32 values. In actual use, other character encoding tables corresponding to a plurality of values composed of only numbers, only letters, or partial digits and partial letters may be selected as needed. For example, you can use common hexadecimal values for encoding.
  • the character encoding method with error correction function includes the following steps: (1) setting an error correction rate of the error correction character generating device; that is, setting the number of characters that can be corrected, such as Set one error correction character; (2) generate a set of data characters according to the character encoding table; the character encoding table can be arbitrarily selected according to requirements; (3) according to the set error correction rate, the error correction character generating device generates and The error correction character corresponding to the data character; when processed by the Reed Solomon algorithm, the number of error correction characters generated is twice the number of error correction characters set; (4) the data characters and steps generated by the step (2) ( 3)
  • the generated error correction characters constitute a character code with an error correction function. Then you can set the character encoding in production. On the product, used to mark the product, the character code can be set on the product in one or more lines.
  • the error correction rate set in the step (1) is 1 character
  • the error correction is performed using the Reed Solomon algorithm, and if the length of the data character is N, the error correction rate is 1/(N + 2 ⁇ 1).
  • the decoding process if there is a character reading error, it can be corrected. If there is a 2 character reading error, it can only be judged that the data character has an error and cannot be corrected.
  • the number of error corrections is constant, the more the number of data characters, the lower the error correction rate.
  • the data character ACDE1234 is generated by using the character encoding table shown in Table 1; the number of characters requiring error correction is set to 2; and the error correction character generating device is used to generate and data using the error correction algorithm.
  • the four error correction characters corresponding to the character such as EGH2 (this is an example, the actual error correction value needs to be obtained according to a specific error correction algorithm); combining the data characters and the error correction characters to form an error correction function Character encoding, such as ACDE1234EGH2.
  • the character decoding method with error correction function provided by the present invention is used for decoding the character encoding generated by the above encoding method; and the following steps are included: (1) acquiring a character encoded image and identifying each The number or letter corresponding to each character; (2) According to the error correction rate and the error correction algorithm, the entire set of characters recognized is divided into data characters and error correction characters; (3) the error correction decoding device uses the corresponding error correction algorithm Error correction processing is performed on the character encoding; if the error correction is successful, the data character is output; if the error correction fails, the entire data character encoding is eliminated.
  • the OCR device can be used to read the character code having the error correction function; when the OCR device is used for reading, the recognition rate can be more than 90%.
  • the length of the data character N may be first calculated according to the error correction rate T/(N+2T) and the length of the character encoding (N+2T). And the length of the error correction character is 2T, and then the character division is performed; wherein T is the number of characters required for error correction.
  • the length of the data characters and the length of the error correction characters can also be first calculated according to the error correction algorithm, the error correction rate, and the length of the character encoding, and then the character division is performed.
  • the error correction decoding apparatus used in the above step (3) is a device capable of discriminating an error and correcting an error after inputting a character code, and when the number of error characters is less than or equal to the number of error correction characters set, the error is read. Characters can be corrected, error correction is successful; otherwise, only recognition errors can be found Errors can not correct the wrong characters, error correction failed.
  • the error correction algorithm used by the error correction decoding device should be identical to the error correction algorithm used to generate the character encoding.
  • the process of rejecting the entire set of data character encoding can also be understood as a process of culling a product provided with the data character encoding.
  • the rejecting device used in the step (3) means a device that rejects the defective product.
  • the data characters that failed the error correction are not saved in the database.
  • the error correction decoding device may further include a process of converting the character data and the error correction data into corresponding values using the character encoding table. Then perform error correction operations.
  • error correction character generating device error correction decoding device, culling setting, and the like may be implemented by an FPGA or firmware, or may be implemented by a dedicated software program running in a general-purpose microprocessor.
  • the specific implementation manners are conventional technical means that can be grasped by those skilled in the art, and are not specifically described herein.
  • the bottle cap shown in Figs. 4 and 5 will be taken as an example to introduce a product provided with a character code having an error correction function.
  • the bottle cap is taken as an example to introduce the production system for producing the cap.
  • the present invention provides such a product provided with the above character encoding, wherein the character encoding is composed of data characters and their corresponding error correcting characters.
  • the error correction character generating means After inputting data characters, the error correction character generating means generates an error based on the error correction rate and the error correction algorithm. Wrong character.
  • the character code is then composed of data characters and error correction characters and placed on the product.
  • the corresponding values of the character codes set on different products are different and can be used as product codes for inquiring in the production and sales process.
  • QR code recognition software has become a must-have software for mobile phones, and a large number of mobile phone applications contain two-dimensional code recognition functions.
  • enterprises have set the lottery two-dimensional code on many products.
  • the integral lottery two-dimensional code is usually hidden in the product packaging, and only after the purchase is destroyed by the packaging. QR code. Therefore, in the database, the character encoding needs to be associated with the two-dimensional code, so that the manufacturer can judge the destination of the corresponding two-dimensional code by reading the character encoding set on the product.
  • the above-mentioned product and production system provided with character encoding and two-dimensional code with error correction function are particularly suitable for use in various caps such as crown caps and the like.
  • the two-dimensional code and character code set on the bottle cap are identified by the visual recognition device and the two are stored in the background database to ensure the normal sale of the bottle cap.
  • the crown cap shown in FIGS. 4 and 5 includes a cover body 11.
  • a two-dimensional code 14, a glue layer, and an edible sealant pad 15 are sequentially disposed downward on the inner side of the lid body 11.
  • the edible sealant pad 15 is disposed on the surface of the two-dimensional code 14 and the adhesive layer.
  • the edible sealing rubber pad 15 is made of edible silica gel material, and the two-dimensional code 14 can be insulated from the liquid in the bottle by setting the edible sealing rubber pad 15 to prevent the liquid from dissolving and destroying the two-dimensional code 14, and avoiding the two-dimensional code 14 from causing liquid in the bottle. Pollution.
  • a bottom oil layer and a surface oil layer are disposed in this order on the top side of the lid body 11.
  • the exposed visible oil layer forms a character code 13.
  • the character code 13 is composed of data characters and error correction characters, and the character code 13 is obtained by the above encoding method.
  • the character code 13 can be composed of letters and/or numbers, has a short length, is easy to recognize in the production process, and has a fast recognition speed.
  • the character code 13 can be arranged in one or more lines.
  • the base oil layer may be a fluorescent ink or a transparent ink. Further, a printed pattern may be disposed between the base oil layer and the oil layer.
  • the two-dimensional code 14 and the character code 13 are identified and associated in the background, having a unique correspondence, thereby constituting two identification codes of the cap.
  • the QR code 14 can be used for activities such as points, lotteries, and the like after the consumer destroys the package.
  • the product is marked by the use of such character encoding with error correction.
  • the identification process if the error correction of the character encoding set on the product is successful, the character data of the product is stored in the database and stored in association with the two-dimensional code set on the back of the product. If the error correction of the character encoding set on the product is unsuccessful, the above-mentioned character encoding recognition error is judged, thereby eliminating the corresponding product, and deleting the relevant data in the database, thereby ensuring the character encoding on the product entering the sales link. 100% identifiable.
  • the manufacturer or the dealer can know the whereabouts of the product by identifying the character code on the outside of the bottle cap, and carry out the anti-smuggling inquiry; and, by identifying the character code on the outside of the cap, the second side of the cap can be determined.
  • Dimensional code so that by adjusting the winning range of the QR code, the marketing activities can be guaranteed to proceed normally.
  • the present invention provides a character encoding method and a character decoding method for encoding and decoding a character encoding having an error correction function.
  • a character encoding with error correction function is set on the product, it is possible to judge whether there is an error in the recognition of the character encoding through the error correction algorithm, and it can be ensured that only the data characters with successful error correction can be stored in the system, and the data character 100 that fails the error correction is ensured.
  • % is culled to ensure that there are no misreading data in the data system and to avoid data misreading during the sales process.

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Abstract

L'invention concerne un procédé de codage de caractère et un procédé de décodage de caractère ayant une fonction de correction d'erreur et un produit utilisant le procédé de codage de caractère. Le codage de caractère ayant la fonction de correction d'erreur consiste en un caractère de données et en un caractère de correction d'erreur correspondant. Utiliser le codage de caractère pour marquer un produit peut régler efficacement le problème dans l'état de la technique selon lequel les données codées comprenant uniquement un caractère de données sont facilement lues de façon erronée. En déterminant si l'identification du codage de caractère a une erreur par l'intermédiaire d'un algorithme de correction d'erreur, la présente invention peut garantir que seul le caractère de données ayant été corrigé avec succès peut être stocké dans le système, et le caractère de données ayant été corrigé sans succès peut être éliminé entièrement, ce qui permet de garantir qu'aucune donnée lue de façon erronée ne se trouve dans le système de données.
PCT/CN2016/079114 2015-06-26 2016-04-12 Procédé de codage de caractère et procédé de décodage de caractère ayant une fonction de correction d'erreur et produit associé WO2016206446A1 (fr)

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CN2015103631857 2015-06-26

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CN114519856A (zh) * 2022-01-26 2022-05-20 西北工业大学 航空发动机叶片字符明码识别结果的后处理判断校正方法

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CN104899612A (zh) * 2015-06-26 2015-09-09 信码互通（北京）科技有限公司 具有纠错功能的字符编码方法、字符解码方法及其产品
BR112018008266A2 (pt) * 2015-10-25 2018-10-23 Alva Alta Lda embalagem reconhecível por diferentes tipos de meios, sistema e processo para preparação de produtos edíveis com base nas referidas embalagens reconhecíveis
CN111652541B (zh) * 2020-05-07 2022-11-01 美的集团股份有限公司 工业生产监测方法、系统以及计算机可读存储介质
CN117375623B (zh) * 2023-10-11 2024-05-24 广东技术师范大学 一种基于二进制的模具编码和识别方法、存储装置及智能终端

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CN114519856B (zh) * 2022-01-26 2024-02-09 西北工业大学 航空发动机叶片字符明码识别结果的后处理判断校正方法

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