CN114564976A - Code scanning method of double-camera code scanning engine - Google Patents
Code scanning method of double-camera code scanning engine Download PDFInfo
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- CN114564976A CN114564976A CN202210094704.4A CN202210094704A CN114564976A CN 114564976 A CN114564976 A CN 114564976A CN 202210094704 A CN202210094704 A CN 202210094704A CN 114564976 A CN114564976 A CN 114564976A
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- 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
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
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Abstract
The invention provides a code scanning method of a double-shooting code scanning engine, wherein the code scanning engine can give consideration to long-distance and short-distance code scanning by arranging a first camera unit and a second camera unit with different focal lengths, and has incomparable advantages compared with a zoom engine in the aspects of cost, size and durability; by arranging the control signal switching unit and the data signal switching unit, the existing code scanning engine can be compatible, other signals do not need to be additionally added, and the compatibility and the cost are optimal; according to the code scanning method, the single camera unit is adopted to obtain the image, and the mode of using the other camera unit is switched until the decoding is unsuccessful, so that the time loss of frequent switching is reduced, and the decoding effect and the decoding efficiency are ensured.
Description
Technical Field
The invention relates to the technical field of bar code scanning, in particular to a code scanning method of a double-camera code scanning engine.
Background
At present, the bar code scanning device is widely applied to the fields of business surpassing, logistics, industrial identification and the like. The bar code scanning technology is generally implemented based on a digital image acquisition and processing mode, and a bar code image of a marked object is acquired through a digital camera original and is identified as a digital signal which can be directly accepted by a computer through image processing and decoding.
In some industrial applications, when a user uses a code scanning gun or a PDA or other equipment to input bar code data, some stations need to input long-distance bar codes, some stations need to input short-distance bar codes, and even some stations need to scan long-distance bar codes and near-end bar codes. Most of the existing middle and low end code scanning engines use fixed focus optical lenses, the optical depth of field is short, different product SKUs are generally configured according to the use scenes, such as hd (high definition) for short distance attack, ER/xr (extended range) for long distance attack, sr (standard range) for medium and short distance attack, and different SKUs of the middle and low end fixed focus lenses have different optical clear ranges, so that code scanning for long distance and medium and short distance cannot be considered; the high-end code scanning engine can clearly see the bar codes at the far end or the near end by dynamically adjusting the focal length by using a zoom lens, but the durability of the lens is much worse than that of a fixed-focus lens due to the size, price and zoom time of the zoom lens.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a code scanning method of a double-camera code scanning engine.
In order to realize the purpose, the invention adopts the following technical scheme: a code scanning method for a dual-camera code scanning engine comprises a first camera unit, a second camera unit, and a control signal switching unit, the bar code image decoding device comprises a data signal switching unit, a control unit and a decoding unit, wherein the first camera shooting unit has a first focal length, the second camera shooting unit has a second focal length, the first focal length is larger than the second focal length, the control unit is connected with the control signal switching unit so as to control the control signal switching unit to be connected with one of the first camera shooting unit and the second camera shooting unit, the control unit is connected with the data signal switching unit so as to control the data signal switching unit to be connected with one of the first camera shooting unit and the second camera shooting unit, the input end of the decoding unit is connected with the output end of the control unit so as to obtain and decode a bar code image, and the output end of the decoding unit is connected with the input end of the control unit so as to transmit a decoding result to the control unit; the code scanning method comprises the following steps:
S1, a control unit controls a data signal switching unit and a control signal switching unit to be respectively connected with a first camera shooting unit;
s2, judging whether code scanning is needed or not, if so, performing step S3;
s3, the control unit controls the first camera unit to acquire a bar code image, and the first camera unit transmits the bar code image to the control unit for updating and caching;
s4, decoding the bar code image cached by the control unit by a decoding unit;
s5, judging whether the decoding is successful, if so, performing step S6, otherwise, performing step S7;
s6, judging whether code scanning is needed to be continued, if so, repeating the steps from S3 to S5, and if not, closing the engine;
s7, the control unit controls the data signal switching unit and the control signal switching unit to be connected with the second camera shooting unit respectively;
s8, the control unit controls the second camera unit to acquire a bar code image, and the second camera unit transmits the bar code image to the control unit for updating and caching;
s9, decoding the bar code image cached by the control unit by a decoding unit;
s10, judging whether the decoding is successful, if so, performing step S11, otherwise, performing step S12;
s11, judging whether code scanning is needed to be continued, if so, repeating the steps from S8 to S10, and if not, closing the engine;
S12, the control unit controls the data signal switching unit and the control signal switching unit to be connected with the first camera shooting unit respectively;
s13, repeating the steps S3 to S5.
Preferably, the control unit further comprises a decoding failure counting module, an input end of the decoding failure counting module is connected with an output end of the decoding unit, and when the count value of the decoding failure counting module is 1 and the bar code decoding is successful, the count value of the decoding failure counting module is reset to 0; when the count value of the decoding failure counting module reaches 2, the control unit gives out warning information.
Furthermore, the double-shooting code scanning engine further comprises an alarm unit, the input end of the alarm unit is connected with the output end of the control unit, and when the count value of the decoding failure counting module reaches 2, the control unit controls the alarm unit to send out a warning signal.
Further, step S6 includes the steps of:
s61, judging whether the count value of the decoding failure counting module is 1, if so, resetting the count value of the decoding failure counting module to be 0;
s62, judging whether the code scanning is needed to be continued, if yes, repeating the steps S3 to S5, and if not, closing the engine.
Further, step S11 includes the steps of:
s111, judging whether the count value of the decoding failure counting module is 1, if so, resetting the count value of the decoding failure counting module to be 0;
And S112, judging whether code scanning is required to be continued, if so, repeating the steps S8 to S10, and if not, closing the engine.
Further, step S7 includes the steps of:
s71, updating the count value of the decoding failure counting module by adding 1;
s72, judging whether the count value of the decoding failure counting module is larger than 1, if so, giving warning information by the control unit; if not, go to step S73;
and S73, the control unit controls the data signal switching unit and the control signal switching unit to be respectively connected with the second camera shooting unit.
Further, step S12 includes the steps of:
s121, updating the count value of the decoding failure counting module by adding 1;
s122, judging whether the count value of the decoding failure counting module is greater than 1, if so, giving warning information by the control unit; if not, go to step S123;
and S123, the control unit controls the data signal switching unit and the control signal switching unit to be respectively connected with the first camera shooting unit.
Preferably, before step S1, the control unit controls the data signal switching unit and the control signal switching unit to be connected to the first image pickup unit, respectively, to initialize the first image pickup unit, and the control unit controls the data signal switching unit and the control signal switching unit to be connected to the second image pickup unit, respectively, to initialize the second image pickup unit.
Compared with the prior art, the invention has the following beneficial effects: the code scanning engine can give consideration to code scanning of long distance and short distance by arranging the first camera shooting unit and the second camera shooting unit with different focal lengths, and has incomparable advantages compared with a zoom engine in the aspects of cost, size and durability; by arranging the control signal switching unit and the data signal switching unit, the existing code scanning engine can be compatible, other signals do not need to be additionally added, and the compatibility and the cost are optimal; the code scanning method adopts a single camera shooting unit to obtain an image, and switches the mode of using another camera shooting unit until the decoding is unsuccessful, so that the time loss of frequent switching is reduced, and the decoding effect and the decoding efficiency are ensured.
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FIG. 1 is a schematic diagram of a dual-shooting code scanning engine according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a code scanning method of a dual-shooting code scanning engine according to an embodiment of the present invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, a dual camera scan engine of the present invention includes a first camera unit 1, a second camera unit 2, a control signal switching unit 3, a data signal switching unit 4, a control unit 5, and a decoding unit 6.
The first camera unit 1 has a first focal length, the second camera unit 2 has a second focal length, and the first focal length is greater than the second focal length, so that the first camera unit 1 can scan middle and short range barcodes, and the second camera unit 2 can scan long range barcodes.
The control unit 5 is connected with the control signal switching unit 3 to control the control signal switching unit 3 to be connected with one of the first camera unit 1 and the second camera unit 2, so as to control the first camera unit 1 or the second camera unit 2 to perform scanning operation to acquire a barcode image.
The control unit 5 is connected with the data signal switching unit 4 to control the data signal switching unit 4 to be connected with one of the first camera unit 1 and the second camera unit 2, so as to acquire the barcode image of the first camera unit 1 or the second camera unit 2.
The input end of the decoding unit 6 is connected with the output end of the control unit 5 to acquire and decode the barcode image, and the output end of the decoding unit 6 is connected with the input end of the control unit 5 to transmit the decoding result to the control unit 5.
Preferably, the control unit 5 further comprises a decoding failure counting module 51, the decoding failure counting module 51 is configured to count the number of decoding failure times of a single barcode, an input end of the decoding failure counting module 51 is connected to an output end of the decoding unit 6, and when the count value of the decoding failure counting module 51 is 1 and the barcode decoding succeeds, the count value of the decoding failure counting module 51 is reset to 0; when the count value of the decoding failure counting module 51 reaches 2, that is, when none of the barcode images acquired by the first camera unit 1 and the second camera unit 2 can be successfully decoded, the control unit 5 gives out warning information to remind the user to adjust the distance between the barcode scanning engine and the barcode.
Furthermore, the double-shooting code scanning engine further comprises an alarm unit 7, the input end of the alarm unit 7 is connected with the output end of the control unit 5, and when the counting value of the decoding failure counting module 51 reaches 2, the control unit 5 controls the alarm unit 7 to send out a warning signal which comprises sound, light and the like.
Referring to fig. 2, the code scanning method of the dual shooting code scanning engine according to the present invention is the code scanning engine according to any of the above embodiments, and the code scanning method includes the following steps:
s1, a control unit 5 controls a data signal switching unit 4 and a control signal switching unit 3 to be respectively connected with a first camera shooting unit 1;
s2, judging whether code scanning is needed or not, if yes, performing a step S3;
s3, the control unit 5 controls the first camera unit 1 to obtain a bar code image, and the first camera unit 1 transmits the bar code image to the control unit 5 for updating and caching;
s4, decoding the bar code image cached by the control unit 5 by a decoding unit 6;
s5, judging whether the decoding is successful, if so, performing step S6, otherwise, performing step S7;
s6, judging whether code scanning is needed to be continued, if so, repeating the steps from S3 to S5, and if not, closing the engine;
s7, the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be connected with the second camera shooting unit 2 respectively;
S8, the control unit 5 controls the second camera unit 2 to obtain a bar code image, and the second camera unit 2 transmits the bar code image to the control unit for updating and caching;
s9, decoding the bar code image cached by the control unit 5 by the decoding unit 6;
s10, judging whether the decoding is successful, if so, performing step S11, otherwise, performing step S12;
s11, judging whether code scanning is needed to be continued, if so, repeating the steps from S8 to S10, and if not, closing the engine;
s12, the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be connected with the first camera unit 1 respectively;
s13, repeating the steps S3 to S5.
Preferably, before step S1, the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be connected to the first image pickup unit 1, respectively, to initialize the first image pickup unit 1, and the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be connected to the second image pickup unit 2, respectively, to initialize the second image pickup unit 2.
Preferably, step S6 includes the steps of:
s61, judging whether the count value of the decoding failure counting module 51 is 1, if so, resetting the count value of the decoding failure counting module to 0, and resetting the count value of the decoding failure counting module 51 to 0 when decoding is successful, so as to ensure that the decoding failure counting module 51 records the decoding failure times of a single bar code;
S62, judging whether code scanning is needed to be continued, if so, repeating the steps S3 to S5, and if not, closing the engine.
Similarly, step S11 includes the following steps:
s111, judging whether the count value of the decoding failure counting module 51 is 1, if so, updating the count value of the decoding failure counting module to 0;
and S112, judging whether code scanning is required to be continued, if so, repeating the steps S8 to S10, and if not, closing the engine.
Preferably, step S7 includes the steps of:
s71, updating the count value of the decoding failure counting module 51 by adding 1;
s72, judging whether the count value of the decoding failure counting module 51 is larger than 1, if so, giving warning information by the control unit 5, for example, controlling the alarm unit 7 to send out warning signals such as sound, light and the like by the control unit 5; if not, go to step S73;
and S73, the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be respectively connected with the second camera unit 2.
Similarly, step S12 includes the following steps:
s121, updating the count value of the decoding failure counting module 51 by adding 1;
s122, judging whether the count value of the decoding failure counting module 51 is greater than 1, if so, giving warning information by the control unit 5, for example, controlling the alarm unit 7 to send out warning signals such as sound, light and the like by the control unit 5; if not, go to step S123;
And S123, the control unit 5 controls the data signal switching unit 4 and the control signal switching unit 3 to be respectively connected with the first camera unit 1.
According to the code scanning method of the double-camera code scanning engine, the code scanning engine can give consideration to long-distance and short-distance code scanning by arranging the first camera unit and the second camera unit with different focal lengths, and meanwhile has incomparable advantages of a zoom engine in the aspects of cost, size and durability; by arranging the control signal switching unit and the data signal switching unit, the existing code scanning engine can be compatible, other signals do not need to be additionally added, and the compatibility and the cost are optimal; the code scanning method adopts a single camera shooting unit to obtain an image, and switches the mode of using another camera shooting unit until the decoding is unsuccessful, so that the time loss of frequent switching is reduced, and the decoding effect and the decoding efficiency are ensured.
The present invention has been described in relation to the above embodiments, which are only examples of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (8)
1. A code scanning method of a double-shooting code scanning engine is characterized in that the double-shooting code scanning engine comprises a first camera shooting unit, a second camera shooting unit, a control signal switching unit, a data signal switching unit, a control unit and a decoding unit, wherein the first camera shooting unit has a first focal length, the second camera shooting unit has a second focal length, the first focal length is larger than the second focal length, the control unit is connected with the control signal switching unit to control the control signal switching unit to be connected with one of the first camera shooting unit and the second camera shooting unit, the control unit is connected with the data signal switching unit to control the data signal switching unit to be connected with one of the first camera shooting unit and the second camera shooting unit, the input end of the decoding unit is connected with the output end of the control unit to acquire a bar code image and decode the bar code image, the output end of the decoding unit is connected with the input end of the control unit so as to transmit a decoding result to the control unit; the code scanning method comprises the following steps:
s1, the control unit controls the data signal switching unit and the control signal switching unit to be connected with the first camera shooting unit respectively;
S2, judging whether code scanning is needed or not, if yes, performing a step S3;
s3, the control unit controls the first camera unit to acquire a bar code image, and the first camera unit transmits the bar code image to the control unit for updating and caching;
s4, the decoding unit decodes the barcode image cached by the control unit;
s5, judging whether the decoding is successful, if so, performing step S6, otherwise, performing step S7;
s6, judging whether code scanning is needed to be continued, if so, repeating the steps from S3 to S5, and if not, closing the engine;
s7, the control unit controls the data signal switching unit and the control signal switching unit to be connected with the second camera shooting unit respectively;
s8, the control unit controls the second camera unit to acquire a bar code image, and the second camera unit transmits the bar code image to the control unit for updating and caching;
s9, the decoding unit decodes the bar code image cached by the control unit;
s10, judging whether the decoding is successful, if so, performing step S11, otherwise, performing step S12;
s11, judging whether code scanning is needed to be continued, if so, repeating the steps from S8 to S10, and if not, closing the engine;
s12, the control unit controls the data signal switching unit and the control signal switching unit to be connected with the first camera shooting unit respectively;
S13, repeating the steps S3 to S5.
2. The code scanning method of the dual-shooting code scanning engine as claimed in claim 1, wherein the control unit further comprises a decoding failure counting module, an input end of the decoding failure counting module is connected with an output end of the decoding unit, and when the count value of the decoding failure counting module is 1 and the decoding of the bar code is successful, the count value of the decoding failure counting module is reset to 0; and when the count value of the decoding failure counting module reaches 2, the control unit gives out warning information.
3. The code scanning method of the bi-camera barcode engine as claimed in claim 2, wherein the bi-camera barcode engine further comprises an alarm unit, an input end of the alarm unit is connected to an output end of the control unit, and when the count value of the decoding failure counting module reaches 2, the control unit controls the alarm unit to send out an alarm signal.
4. The code scanning method of the bi-camera barcode engine as claimed in claim 2, wherein the step S6 comprises the steps of:
s61, judging whether the count value of the decoding failure counting module is 1, if so, resetting the count value of the decoding failure counting module to be 0;
S62, judging whether the code scanning is needed to be continued, if yes, repeating the steps S3 to S5, if not, closing the engine.
5. The code scanning method of the double-shooting code scanning engine as claimed in claim 2, wherein the step S11 includes the following steps:
s111, judging whether the count value of the decoding failure counting module is 1, if so, resetting the count value of the decoding failure counting module to be 0;
s112, judging whether the code scanning is required to be continued, if so, repeating the steps from S8 to S10, and if not, closing the engine.
6. The code scanning method of the double-shooting code scanning engine as claimed in claim 2, wherein the step S7 includes the following steps:
s71, updating the count value of the decoding failure counting module by adding 1;
s72, judging whether the count value of the decoding failure counting module is larger than 1, if so, giving warning information by the control unit; if not, go to step S73;
and S73, the control unit controls the data signal switching unit and the control signal switching unit to be respectively connected with the second camera shooting unit.
7. The code scanning method of the double-shooting code scanning engine as claimed in claim 2, wherein the step S12 includes the following steps:
s121, updating the count value of the decoding failure counting module by adding 1;
S122, judging whether the count value of the decoding failure counting module is greater than 1, if so, giving warning information by the control unit; if not, go to step S123;
and S123, the control unit controls the data signal switching unit and the control signal switching unit to be respectively connected with the first camera shooting unit.
8. The code scanning method of the dual-shooting code scanning engine as claimed in claim 1, wherein before step S1, said control unit controls said data signal switching unit and said control signal switching unit to be connected to said first image capturing unit respectively for initializing said first image capturing unit, and said control unit controls said data signal switching unit and said control signal switching unit to be connected to said second image capturing unit respectively for initializing said second image capturing unit.
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