CN110059519B - Bar code reading method and device with security level processing function - Google Patents
Bar code reading method and device with security level processing function Download PDFInfo
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- CN110059519B CN110059519B CN201910328254.9A CN201910328254A CN110059519B CN 110059519 B CN110059519 B CN 110059519B CN 201910328254 A CN201910328254 A CN 201910328254A CN 110059519 B CN110059519 B CN 110059519B
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1413—1D bar codes
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
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Abstract
The invention relates to a bar code reading method with security level processing, which comprises the following steps: triggering a command of reading the bar code, and starting the bar code reading; setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded; collecting the bar code image to obtain a frame of bar code image; sending the collected bar code image to a decoding library for decoding to obtain decoding data; performing security level processing on the decoded data; and judging whether the bar code is decoded successfully, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding.
Description
Technical Field
The invention relates to a barcode reading method and device with security level processing, and belongs to the technical field of barcode reading.
Background
The bar code technology belongs to the field of automatic reading technology, and is one practical data acquisition and automatic input technology developed based on computer technology and information technology. Because the barcode technology has the advantages of low cost, quick and accurate reading, simple operation, low error rate and the like, the barcode technology plays an important supporting role in the formation and transmission process of modern logistics information, becomes a necessary precondition for realizing modern management of logistics, and is widely adopted in modern logistics systems.
The existing bar code reading method has the following defects:
1. a large error rate can occur in the reading process of the bar code with the cross 25 code being less than 5 bytes and the matrix25 code being less than five bytes;
2. when aiming at different Chinese character sets, the bar code reading method can not be compatible with the different Chinese character sets, thereby influencing the Chinese display;
3. the user typically does not know the type of barcode.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a barcode reading method with security level processing, which is used for performing security level processing on decoded data, pre-dividing security levels of different barcode types according to the security of barcodes, setting different decoding logics for the barcodes with different security level levels, and reducing the error rate.
The technical scheme of the invention is as follows:
technical scheme one
A barcode reading method with security level processing comprises the following steps:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time of single bar code reading, and stopping reading when the set time is exceeded;
collecting a bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
and judging whether the bar code is decoded successfully, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding.
Further, the method for processing the security level specifically includes:
acquiring the bar code type in the bar code image, wherein the bar code type comprises a one-dimensional bar code or a two-dimensional bar code;
pre-dividing the security levels of different types of bar codes, and setting the security levels of the different types of bar codes according to the security requirements of the different types of bar codes; the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judging whether the decoded data is a set code or not according to the type of the bar code, and if so, correspondingly setting hardware for reading the bar code; if not, outputting the bar code data processed by the decoding processing logic.
Further, the barcode security level includes four levels: the method comprises a first-level safety level, a second-level safety level, a third-level safety level and a fourth-level safety level;
the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once;
the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and the same data are output;
the decoding processing logic of the three-level security level compares whether the three decoded data are the same after the bar code is read and decoded for three times, if the three decoded data are the same, the data is output, otherwise, the bar code is read and decoded again until the three decoded data are the same, and the same data is output;
the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output.
Further, before outputting the barcode data processed by the decoding processing logic, the method further comprises a step of converting a barcode chinese character set, specifically as follows:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set encoding format is the same as the character set encoding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese character to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
Further, before outputting the barcode data processed by the decoding processing logic, adding AIM ID and/or CODE ID to the barcode data.
Technical scheme two
A barcode reading device with security level processing, comprising a memory and a processor, the memory storing instructions adapted to be loaded by the processor and to perform the steps of:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded;
collecting the bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
and judging whether the bar code is successfully decoded, if so, finishing reading and outputting the bar code data, and otherwise, acquiring a frame of bar code image again and decoding.
Further, the method for processing the security level specifically includes:
acquiring the bar code type in the bar code image, wherein the bar code type comprises a one-dimensional bar code or a two-dimensional bar code;
pre-dividing the security levels of the different types of bar codes, and setting the security levels of the different types of bar codes according to the security requirements of the different types of bar codes; the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judging whether the decoded data is a set code or not according to the type of the bar code, and if so, correspondingly setting a bar code reading device; if not, outputting the bar code data processed by the decoding processing logic.
Further, the barcode security level includes four levels: the method comprises a first-level safety level, a second-level safety level, a third-level safety level and a fourth-level safety level;
the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once;
the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and the same data are output;
the decoding processing logic of the three-level security level is that the bar code reads and decodes three times, compares whether the three decoded data are the same, outputs the data if the three decoded data are the same, and otherwise reads and decodes again until the three decoded data are the same, and outputs the same data;
the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output.
Further, before outputting the barcode data processed by the decoding processing logic, the method further comprises a step of converting a barcode chinese character set, specifically as follows:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set coding format is the same as the character set coding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese characters to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
Further, before outputting the barcode data processed by the decoding processing logic, adding AIM ID and/or CODE ID to the barcode data.
The invention has the following beneficial effects:
1. the invention relates to a bar code reading method with security level processing, which is used for performing security level processing on decoded data, pre-dividing security levels of different bar code types according to the security of bar codes, and setting different decoding logics for the bar codes of different security level levels so as to reduce the error rate.
2. The bar code reading method with the security level processing can select to convert the bar code Chinese character set, is compatible with the Chinese character sets of GBK and UTF-8, and can realize the normal display of Chinese.
3. The barcode reading method with security level processing can add different AIM IDs and CODE IDs to different barcode types, and realizes barcode distinguishing.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of data processing according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example one
Referring to fig. 1, a barcode reading method with security level processing includes the following steps:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded;
collecting the bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
and judging whether the bar code is decoded successfully, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding.
In the embodiment, the longest time for single barcode reading is set, so that the barcode reading equipment is prevented from being in a reading state all the time; and carrying out security level processing on the decoded data to reduce the error rate.
Example two
Further, referring to fig. 2, the method further includes a data processing step, which is specifically as follows:
acquiring the type of the bar Code in the bar Code image, wherein the type of the bar Code comprises se:Sub>A Code39 Code (se:Sub>A standard 39 Code), se:Sub>A Codabar Code (se:Sub>A Codabar Code), se:Sub>A Code25 Code (se:Sub>A standard 25 Code), an ITF25 Code (se:Sub>A cross 25 Code), se:Sub>A Matrix25 Code (se:Sub>A Matrix25 Code), se:Sub>A UPC-A Code, se:Sub>A UPC-E Code, an EAN-13 Code (an EAN-13 international commodity bar Code), an EAN-8 Code (an EAN-8 international commodity bar Code), se:Sub>A Chinese postal Code (se:Sub>A variant of the Matrix25 Code), se:Sub>A Code-B Code, an MSI Code, se:Sub>A Code11 Code, se:Sub>A Code93 Code, an ISBN Code, an ISSN Code, se:Sub>A Code128 Code (se:Sub>A Code128 Code including an EAN128 Code), se:Sub>A Code39EMS (se:Sub>A special 39 Code for EMS) and other one-dimensional bar codes and two-dimensional bar codes such as PDF417 and the like;
the method comprises the steps of dividing security levels of different types of barcodes in advance, setting the security levels of the different types of barcodes according to the security requirements of the different types of barcodes, wherein for example, ITF25 codes (cross 25 codes) and Matrix25 codes (Matrix 25 codes) belong to unsafe barcodes and are easy to generate error codes, and the security levels of the ITF25 codes and the Matrix25 codes are at least one level higher than those of Code25 codes (standard 25 codes); the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judge through the bar code type whether the decoding data is the setting code, if be the setting code, then carry out corresponding setting to the hardware that carries out the bar code recognition, if: setting exposure time, setting a serial port baud rate, setting buzzer volume and setting a light supplement lamp switch; if not, outputting the bar code data processed by the decoding processing logic.
Further, the security level of the bar code comprises four levels, including a first level security level, a second level security level, a third level security level and a fourth level security level; the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once; the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and then the same data are output; the decoding processing logic of the three-level security level compares whether the three decoded data are the same after the bar code is read and decoded for three times, if the three decoded data are the same, the data is output, otherwise, the bar code is read and decoded again until the three decoded data are the same, and the same data is output; the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output; for example, in the present embodiment, the security level of the Code25 Code is divided into a first security level, and the security level of the ITF25 Code is divided into a second security level; if the barcode type in the barcode image is the Code25 Code, decoding the decoded data in the current barcode image for one time and then directly outputting the barcode data; if the type of the bar code read from the bar code image is ITF25 code, the decoding data in the current bar code image is read twice, if the data obtained by reading the decoding twice are the same, the bar code data after reading are output, and if the data obtained by reading the decoding twice are different, the decoding data are continuously read until the same bar code data appear twice, and then the bar code data are output.
Further, before outputting the barcode data processed by the decoding processing logic, the method further comprises a step of converting a barcode chinese character set, specifically as follows:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set coding format is the same as the character set coding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese characters to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
For example, if the encoding format of the Chinese character set which needs to be output currently needs to be GBK, GBK conversion is selected; judging the encoding format of the Chinese character set in the bar code data to obtain that the current encoding format is UTF-8 and the character set is '0X 8 BAF', and looking up '0X 8 BAF' in an encoding library of UTF-8 to obtain Chinese 'news' words; then searching character set of 'news' character in GBK coding library, which is '0 XD1B 6'; then "0XD1B6" is substituted for "0X8BAF".
Further, before outputting the barcode data processed by the decoding processing logic, adding AIM ID and/or CODE ID to the barcode data; by adding AIM ID and/or CODE ID, an identifier can be added for different barcode types, and the current barcode can be directly judged according to the identifier.
The embodiment has the advantages of the first embodiment, and further, the barcode data with higher accuracy is obtained by multiple decoding, so that the error rate is reduced; the bar code Chinese character set can be selectively converted, and the Chinese character set compatible with GBK and UTF-8 is used for preventing the problem that Chinese cannot be displayed; AIM ID and CODE ID are added to the bar CODE data, identifiers can be added to different bar CODE types, and the bar CODEs are distinguished.
EXAMPLE III
A barcode reading device with security level processing, comprising a memory and a processor, the memory storing instructions adapted to be loaded by the processor and to perform the steps of:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded;
collecting the bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
and judging whether the bar code is decoded successfully, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding.
In the embodiment, the longest time for single barcode reading is set, so that the barcode reading equipment is prevented from being in a reading state all the time; and the decoded data is processed by the security level, so that the error rate is reduced.
Example four
Further, referring to fig. 2, the method further includes a data processing step, which is specifically as follows:
acquiring the type of the bar Code in the bar Code image, wherein the type of the bar Code comprises se:Sub>A Code39 Code (se:Sub>A standard 39 Code), se:Sub>A Codabar Code (se:Sub>A Codabar Code), se:Sub>A Code25 Code (se:Sub>A standard 25 Code), an ITF25 Code (se:Sub>A cross 25 Code), se:Sub>A Matrix25 Code (se:Sub>A Matrix25 Code), se:Sub>A UPC-A Code, se:Sub>A UPC-E Code, an EAN-13 Code (an EAN-13 international commodity bar Code), an EAN-8 Code (an EAN-8 international commodity bar Code), se:Sub>A Chinese postal Code (se:Sub>A variant of the Matrix25 Code), se:Sub>A Code-B Code, an MSI Code, se:Sub>A Code11 Code, se:Sub>A Code93 Code, an ISBN Code, an ISSN Code, se:Sub>A Code128 Code (se:Sub>A Code128 Code including an EAN128 Code), se:Sub>A Code39EMS (se:Sub>A special 39 Code for EMS) and other one-dimensional bar codes and two-dimensional bar codes such as PDF417 and the like;
the method comprises the steps of dividing security levels of different types of barcodes in advance, setting the security levels of the different types of barcodes according to the security requirements of the different types of barcodes, wherein for example, ITF25 codes (cross 25 codes) and Matrix25 codes (Matrix 25 codes) belong to unsafe barcodes and are easy to generate error codes, and the security levels of the ITF25 codes and the Matrix25 codes are at least one level higher than those of Code25 codes (standard 25 codes); the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judge through the bar code type whether the decoding data is the setting code, if the setting code, then to carrying out the bar code recognition device and carry out corresponding setting, if: setting exposure time, setting a serial port baud rate, setting buzzer volume and setting a light supplement lamp switch; if not, outputting the bar code data processed by the decoding processing logic.
Further, the security level of the bar code comprises four levels, including a first level security level, a second level security level, a third level security level and a fourth level security level; the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once; the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and the same data are output; the decoding processing logic of the three-level security level is that the bar code reads and decodes three times, compares whether the three decoded data are the same, outputs the data if the three decoded data are the same, and otherwise reads and decodes again until the three decoded data are the same, and outputs the same data; the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output; for example, in the present embodiment, the security level of the Code25 Code is divided into a first security level, and the security level of the ITF25 Code is divided into a second security level; if the barcode type in the barcode image is the Code25 Code, decoding the decoded data in the current barcode image for one time and then directly outputting the barcode data; if the type of the bar code read from the bar code image is ITF25 code, reading the decoded data in the current bar code image twice, outputting the read bar code data if the data obtained by reading the decoded data twice are the same, and if the data obtained by reading the decoded data are different, continuing reading the decoded data until the same bar code data appears twice and then outputting the bar code data.
Further, before outputting the barcode data processed by the decoding processing logic, the method further includes a step of converting a barcode chinese character set, which specifically includes:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set coding format is the same as the character set coding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese character to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
For example, if the encoding format of the Chinese character set which needs to be output currently needs to be GBK, GBK conversion is selected; judging the encoding format of the Chinese character set in the bar code data to obtain that the current encoding format is UTF-8 and the character set is '0X 8 BAF', and looking up '0X 8 BAF' in an encoding library of UTF-8 to obtain Chinese 'news' words; then searching character set of 'news' character in GBK coding library, which is '0 XD1B 6'; then "0XD1B6" is substituted for "0X8BAF".
Further, before outputting the bar CODE data processed by the decoding processing logic, adding AIM ID and/or CODE ID to the bar CODE data; by adding AIM ID and/or CODE ID, an identifier can be added for different barcode types, and the current barcode can be directly judged according to the identifier.
The embodiment has the advantages of the third embodiment, and further, the barcode data with higher accuracy is obtained by multiple decoding, so that the error rate is reduced; the bar code Chinese character set can be converted selectively, the Chinese character sets of GBK and UTF-8 are compatible, and the problem that Chinese cannot be displayed is prevented; AIM ID and CODE ID are added to the bar CODE data, identifiers can be added to different bar CODE types, and the bar CODEs are distinguished.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A barcode reading method with security level processing is characterized by comprising the following steps:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded;
collecting the bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
judging whether the bar code is decoded successfully, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding;
acquiring the bar code type in the bar code image, wherein the bar code type comprises a one-dimensional bar code or a two-dimensional bar code;
pre-dividing the security levels of different types of bar codes, and setting the security levels of the different types of bar codes according to the security requirements of the different types of bar codes; the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judging whether the decoded data is a set code or not according to the type of the bar code, and if so, correspondingly setting hardware for reading the bar code; if not, outputting the bar code data processed by the decoding processing logic.
2. The barcode reading method with security level processing according to claim 1, wherein the security level of the barcode comprises four levels: the method comprises a first-level safety level, a second-level safety level, a third-level safety level and a fourth-level safety level;
the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once;
the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and the same data are output;
the decoding processing logic of the three-level security level is that the bar code reads and decodes three times, compares whether the three decoded data are the same, outputs the data if the three decoded data are the same, and otherwise reads and decodes again until the three decoded data are the same, and outputs the same data;
the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output.
3. The method of claim 1, further comprising a step of converting a chinese character set of the barcode before outputting the barcode data processed by the decoding processing logic, wherein the method comprises the steps of:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set coding format is the same as the character set coding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese character to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
4. The barcode reading method with security level processing according to claim 1, wherein: adding AIM ID and/or CODE ID to the bar CODE data before outputting the bar CODE data processed by the decoding processing logic.
5. A barcode reading device with security level processing, comprising a memory and a processor, the memory storing instructions adapted to be loaded by the processor and to perform the steps of:
triggering a command of reading the bar code, and starting the bar code reading;
setting the maximum time for single bar code reading, and terminating the reading when the set time is exceeded;
collecting the bar code image to obtain a frame of bar code image;
sending the collected bar code image to a decoding library for decoding to obtain decoding data;
performing security level processing on the decoded data;
judging whether the bar code is successfully decoded, if so, finishing reading and outputting the bar code data, and if not, acquiring a frame of bar code image again and decoding;
acquiring the bar code type in the bar code image, wherein the bar code type comprises a one-dimensional bar code or a two-dimensional bar code;
pre-dividing the security levels of different types of bar codes, and setting the security levels of the different types of bar codes according to the security requirements of the different types of bar codes; the security level is divided into at least two levels;
presetting decoding processing logic of bar codes with different levels of security levels;
recognizing the bar code type of the bar code in the bar code image, judging which level the bar code type of the current bar code belongs to, and processing the current bar code according to the decoding processing logic corresponding to the security level;
judging whether the decoded data is a set code or not according to the type of the bar code, and if so, correspondingly setting a bar code reading device; if not, outputting the bar code data processed by the decoding processing logic.
6. A barcode reading device with security level processing according to claim 5, wherein the security level of the barcode comprises four levels: the method comprises a first-level safety level, a second-level safety level, a third-level safety level and a fourth-level safety level;
the decoding processing logic of the first-level security level is that the bar code is directly output after being read and decoded once;
the decoding processing logic of the secondary security level compares whether the two decoded data are the same after the bar code is read and decoded twice, if the two decoded data are the same, the data is output, otherwise, the two decoded data are read and decoded again until the two decoded data are the same, and the same data are output;
the decoding processing logic of the three-level security level compares whether the three decoded data are the same after the bar code is read and decoded for three times, if the three decoded data are the same, the data is output, otherwise, the bar code is read and decoded again until the three decoded data are the same, and the same data is output;
the decoding processing logic of the four-level security level compares whether the four decoded data are the same after the bar code is read and decoded for four times, if the four decoded data are the same, the data are output, otherwise, the bar code is read and decoded again until the four decoded data are the same, and the same data are output.
7. The barcode reader with security level processing of claim 5, further comprising a step of converting a barcode chinese character set before outputting the barcode data processed by the decoding processing logic, specifically as follows:
selecting Chinese character set encoding formats to be converted, wherein the Chinese character set encoding formats comprise a GBK encoding format and a UTF-8 encoding format;
judging whether the current character set belongs to a GBK coding format or a UTF-8 coding format according to the coding rule of the character set;
if the current character set coding format is the same as the character set coding format of the target conversion, the conversion is not needed;
if the encoding format of the current character set is different from that of the target conversion character set, firstly looking up a table from the current character set to an encoding library of the encoding format of the current character set to obtain a corresponding Chinese character; looking up a table in a coding library of a target conversion character coding format according to the acquired Chinese character to obtain a corresponding character set;
and looking up a table in the coding library of the target conversion character coding format to obtain a corresponding character set to replace the original character set.
8. The barcode reader with security level processing of claim 5, wherein: adding AIM ID and/or CODE ID to the bar CODE data before outputting the bar CODE data processed by the decoding processing logic.
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