WO2009096711A2 - Dispositif de balayage de code-barre et procédé de lecture de code-barre - Google Patents

Dispositif de balayage de code-barre et procédé de lecture de code-barre Download PDF

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Publication number
WO2009096711A2
WO2009096711A2 PCT/KR2009/000429 KR2009000429W WO2009096711A2 WO 2009096711 A2 WO2009096711 A2 WO 2009096711A2 KR 2009000429 W KR2009000429 W KR 2009000429W WO 2009096711 A2 WO2009096711 A2 WO 2009096711A2
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WO
WIPO (PCT)
Prior art keywords
scan
laser
processor
scanner
image
Prior art date
Application number
PCT/KR2009/000429
Other languages
English (en)
Korean (ko)
Other versions
WO2009096711A3 (fr
Inventor
Jin Tae Kim
Original Assignee
Bluebird Soft Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bluebird Soft Co., Ltd. filed Critical Bluebird Soft Co., Ltd.
Publication of WO2009096711A2 publication Critical patent/WO2009096711A2/fr
Publication of WO2009096711A3 publication Critical patent/WO2009096711A3/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • 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
    • G06K7/0004—Hybrid readers

Definitions

  • Embodiments of the present invention relate to a barcode scanner and a method of reading the same, and a barcode scanner capable of reading one-dimensional and two-dimensional barcodes in a single device and a method of reading the same.
  • the barcode consists of a combination of optically readable black bars and white spaces, and contains information such as the manufacturer, the type of product, and the price.
  • the bar code makes it easy to sell and manage the product. It is used.
  • the one-dimensional barcode Since the one-dimensional barcode has a structure in which black bars and white spaces are arranged in one dimension, it is easy to receive and read the light reflected from the one-dimensional barcode, but there is a limit to expressing a large amount of information.
  • the thickness and spacing of the black bar and the white space must be greater than or equal to a predetermined value.
  • the size of the information is inevitably increased, and as the size of the one-dimensional barcode increases, the reading device for reading it also becomes large, which makes it practically impossible to use.
  • an apparatus for reading a two-dimensional bar code generally uses a method of capturing an image of a two-dimensional bar code and then comparing and calculating pixel information of the photographed two-dimensional bar code.
  • the scanning time and decoding time of the 2D barcode are generally longer than that of the 1D barcode.
  • An object of the present invention is to provide a barcode reader capable of laser scanning and image scanning, and to quickly read information obtained by laser scanning and image scanning, and a method of reading the same.
  • the present invention it is possible to read regardless of the type of barcode, and the reading speed is improved due to the scanning and decoding processing in parallel, and there is no need to separately install a laser scanner and an image scanner.
  • FIG. 1 is a perspective view according to an embodiment of a barcode scanner according to the present invention.
  • FIG. 2 is a block diagram according to an embodiment of a barcode scanner according to the present invention.
  • FIG. 3 is a signal flow diagram of a barcode scanner according to an embodiment of the present invention.
  • FIG. 4 is a signal flow diagram of a barcode scanner according to another embodiment of the present invention.
  • 5 and 6 are signal flow diagrams according to the decoding success of FIG.
  • a barcode scanner for achieving the object of the present invention, a laser scanner for outputting the first data through the laser scan, an image scanner for outputting the second data through the image scan, and the laser scanner and the image scanner And a processor connected to and controlling the operation of the laser scanner and the operation of the image scanner.
  • the barcode reading method alternates between a first scan step of acquiring first data using a laser, a second scan step of acquiring an image by acquiring an image, and the first scan and the second scan. Controlling to be done as an enemy.
  • FIG. 1 is a perspective view according to an embodiment of a barcode scanner according to the present invention.
  • the barcode scanner includes a laser scanner 130 for laser scanning, an image scanner 140 for scanning an image, and a processor (not shown) connected to the laser scanner 130 and the image scanner 140.
  • the barcode scanner may further include an interface (not shown) that receives a user input and transmits a signal to the processor 100.
  • the laser scanner 130 includes a laser generation module (not shown) for generating a laser and a scan window 132 for irradiating a laser to a barcode and scanning the reflected light.
  • the laser scanner 130 scans the reflected light through the scan window 132, converts the reflected light into a digital signal, and transmits the converted light to the processor 100.
  • the image scanner 140 captures an image through a camera 142 which captures an image, for example, photographs a barcode, converts the barcode into a digital signal, and transmits the barcode to the processor 100.
  • the image scanner 140 may include at least one lighting device 144 for lighting during image capturing.
  • the processor 100 is connected to the laser scanner 130 and the image scanner 140 to control the operation of each of the two scanners 130 and 140.
  • the processor 100 reads a barcode by decoding the output data of the laser scanner 130 and the output data of the image scanner 140.
  • FIG. 2 is a block diagram according to an embodiment of a barcode scanner according to the present invention.
  • the barcode scanner includes a laser scanner 130 for laser scanning, an image scanner 140 for scanning images, and a processor 100 connected to the laser scanner 130 and the image scanner 140. Include.
  • the barcode scanner may further include an interface 150 that receives a user input and transmits a signal to the processor 100.
  • the laser scanner 130 includes a laser generation module 135 for generating a laser and a scan window 132 for irradiating the laser and scanning the reflected light.
  • the laser scanner 130 transmits the reflected light scanned through the scan window 132 to the processor 100 as first data converted into a digital signal.
  • the image scanner 140 transmits the captured image through the camera 142 which captures the image to the processor 100 as second data converted into a digital signal.
  • the image scanner 140 may include at least one lighting device 144 for lighting during image capturing.
  • the processor 100 is connected to the laser scanner 130 and the image scanner 140 to control the operation of each of the two scanners 130 and 140.
  • the processor 100 reads a barcode by decoding the output data of the laser scanner 130 and the output data of the image scanner 140.
  • the processor 100 alternately executes a laser scan and an image scan. This alternating execution is repeated until decoding succeeds. This is because laser scans or image scans often do not provide accurate data. If the decoding is not successful due to damage to the barcode, laser scan and image scan may be alternately repeated indefinitely. In order to prevent such an infinite loop, the processor 100 may terminate the scan when the laser scan or the image scan exceeds a predetermined number of times.
  • the processor 100 may first execute a laser scan whose scan rate and decoding rate are relatively faster than the image scan. In addition, the processor 100 may control the image scan to be executed after scanning the reflected light for each predetermined number of laser scans.
  • the processor 100 may include a first processor 110 that controls the execution of the laser scanner 130 and a second processor 120 that controls the execution of the image scanner 140.
  • One of the first processor 110 and the second processor 120 may be the main to control the other.
  • the first processor 110 may decode the first data
  • the second processor 120 may decode the second data.
  • the overall decoding time can be reduced.
  • the decoding time can be shortened, reducing the barcode reading time.
  • the laser generation module 135 may irradiate the laser so that the photographing position is displayed when the image scanner 140 scans the image. Therefore, the image scanner 140 does not have to separately include an amer for indicating a barcode position.
  • the barcode scanner may further include an interface 150 responsive to the scan start request.
  • the interface 150 transmits the scan start request to the processor 100 when it is input.
  • the processor 100 may control to execute from the laser scan in response to the scan start signal.
  • FIG. 3 is a signal flow diagram of a barcode scanner according to an embodiment of the present invention.
  • the barcode scanner includes a laser scanner 130, an image scanner 140, and a processor 100.
  • the processor 100 receives a scan start signal from the interface 150, and the processor 100 transmits a scan start signal for executing a laser scan to the laser scanner 130 (S210).
  • the laser scanner 130 starts a laser scan on the scan target, for example, a barcode, in response to the scan start signal (S215).
  • the laser scanner 130 ends (S220)
  • the laser scanner 130 transmits a laser scan end signal to the processor 100 (S225).
  • the laser scanner 130 transmits the first data through the laser scan to the processor 100 (S235).
  • the processor 100 requests the image scanner 140 to execute a scan in response to the laser scan end signal (S230).
  • the image scanner 140 receives a scan request and starts scanning an image (S250). When the image scanner 140 ends (S255), the image scanner 140 transmits an image scan end signal to the processor 100 (S260).
  • the processor 100 starts decoding the first data (S240). If the processor 100 succeeds in decoding the first data, the image scanning operation is stopped. This may cause the processor 100 to interrupt an interruption of the scan to stop the scan operation of the image scanner 140. If decoding of the first data fails (S245), the processor 100 waits until the image scan end signal is received, and then requests the laser scanner 130 to execute scanning (S265).
  • the laser scanner 130 starts the laser scan according to the scan request (S280).
  • the processor 100 starts decoding the second data (S290). If the decoding of the second data succeeds, an interruption of the scan stop is applied to the laser scanner 130. When a scan stop interrupt occurs, the decoded value is returned and all scan or decoding operations related to the scan are stopped, for example.
  • the laser scanner 130 ends the laser scan without interruption (S285).
  • the laser scanner 130 transmits a laser scan end signal to the processor 100 (S300).
  • the laser scanner 130 transmits the first data to the processor 100 for decoding (S320).
  • the processor 100 receives the laser scan end signal, the processor 100 requests a scan from the image scanner 140 (S310).
  • the barcode scanner may further include a counter for increasing the count to stop the barcode reading (control of scanning, decoding, etc.) when a certain number of times is repeated.
  • FIG. 4 is a signal flow diagram of a barcode scanner according to another embodiment of the present invention.
  • 5 and 6 are signal flow diagrams according to the decoding success of FIG. See FIG. 2.
  • the barcode scanner includes a laser scanner 130, an image scanner 140, a first processor 110, and a second processor 120.
  • the processor 100 may include a first processor 110 controlling the execution of the laser scanner 130 and a second processor 120 controlling the image scanner 140.
  • One of the first processor 110 and the second processor 120 may be the main to control the other.
  • the first processor 110 is set to be main.
  • the first processor 110 receives a scan start signal from the interface 150, and the first processor 110 transmits a scan start signal for executing a laser scan to the laser scanner 130 (S410).
  • the laser scanner 130 starts the laser scan in response to the scan start signal (S415).
  • the laser scanner 130 ends the laser scan (S420)
  • the laser scanner 130 transmits a laser scan end signal to the first processor 110 (S425).
  • the laser scanner 130 transmits the first data through the laser scan to the first processor 110 (S435).
  • the first processor 110 When the first processor 110 receives the laser scan end signal, the first processor 110 transmits the laser scan end signal to the second processor 120 in order to scan an image (S427).
  • the second processor 120 requests the image scanner 140 to execute a scan in response to the laser scan end signal (S430).
  • the image scanner 140 receives a scan request and starts scanning an image (S450). When the image scanner 140 ends (S455), the image scanner 140 transmits an image scan end signal to the second processor 120 (S460).
  • the first processor 110 starts decoding the first data (S440). If the first processor 110 succeeds in decoding the first data, the first processor 110 stops the image scanning operation. This may cause the first processor 110 to interrupt the scan stop, thereby stopping the scan operation of the image scanner 140 on the second processor 120.
  • a signal flow diagram when the decoding succeeds in the first processor 110 is shown.
  • the first processor 110 transmits the first execution end signal to the second processor 120 (S620) when the first decoding, which is decoding of the first data, is successful (S610).
  • the second processor 120 receives the first execution end signal
  • the second processor 120 transmits a stop signal for stopping the scan operation of the image scanner 140 (S630).
  • the image scanner 140 stops scanning the image (S640).
  • the first processor 110 waits until the image scan end signal is received, and then requests the laser scanner 130 to execute the scan (S465).
  • the laser scanner 130 starts the laser scan according to the scan request (S480).
  • the second processor 120 starts the second decoding, which is the decoding of the second data (S490). If the decoding of the second data succeeds, an interruption of the scan stop is applied to the laser scanner 130. Or, if a scan stop interrupt occurs, the decoded value is returned and all scan or decoding operations related to the scan are stopped, for example.
  • the laser scan of the laser scanner 130 may be finished before the decoding of the second processor 120.
  • Image decoding which takes images and analyzes them, can be relatively longer than laser scans.
  • the first processor 110 receives the laser termination signal and the first data of the laser scanner 130 (S500 and S520) and starts the first decoding, which is decoding of the first data (S610). In other words, while the second decoding continues, the first decoding may overlap. If either of the first processors 110 and the second processor 120 decodes together, the decoding may be interrupted by generating an interrupt when the decoding succeeds.
  • the second processor 120 succeeds in the second decoding (S620), and transmits the second end signal to the first processor 110 (S630). Upon receiving the second end signal, the first processor 110 stops the first decoding (S640).
  • the laser scanner 130 ends the laser scan without interruption (S485).
  • the laser scanner 130 transmits a laser scan end signal to the first processor 110 (S500).
  • the laser scanner 130 transmits the first data to the first processor 110 for decoding (S520).
  • the first processor 110 transmits the laser end scan signal to the second processor 120 (S505).
  • the second processor 120 receives the laser scan end signal, the second processor 120 requests a scan from the image scanner 140 (S510).
  • the barcode scanner may further include a counter for increasing the count to stop the barcode reading (control of scanning, decoding, etc.) when a certain number of times is repeated.
  • the present invention can also be embodied as computer readable code on a computer readable recording medium.
  • the computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like.
  • the computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.
  • An embodiment of the present invention can be used in a barcode scanner and a barcode reading method using the scanner.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
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Abstract

La présente invention concerne un dispositif de balayage de code-barre et un procédé de lecture de code-barre. Le dispositif de balayage de code-barre de la présente invention comprend un dispositif de balayage laser permettant de produire en sortie des premières données par un balayage laser et, un dispositif de balayage d'image permettant de produire en sortie des secondes données par un balayage d'image et, un processeur connecté au dispositif de balayage laser et au dispositif de balayage d'image qui commande le fonctionnement du dispositif de balayage laser et le fonctionnement du dispositif de balayage d'image. Le dispositif de balayage de code-barre de la présente invention peut lire des code-barres à une dimension et des code-barres à deux dimensions et améliore la vitesse de lecture de code-barre.
PCT/KR2009/000429 2008-01-29 2009-01-29 Dispositif de balayage de code-barre et procédé de lecture de code-barre WO2009096711A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080009253A KR20090083231A (ko) 2008-01-29 2008-01-29 바코드 스캐너 및 바코드 판독 방법
KR10-2008-0009253 2008-01-29

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WO2009096711A2 true WO2009096711A2 (fr) 2009-08-06
WO2009096711A3 WO2009096711A3 (fr) 2009-10-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990008541A (ko) * 1997-07-02 1999-02-05 윤종용 복합기의 인터페이스 장치 및 방법
KR20030005153A (ko) * 2001-07-05 2003-01-17 (주)우주커넥션스 바코드 및 이차원 코드 판독 장치
KR20060010179A (ko) * 2004-07-27 2006-02-02 주식회사 칼라짚미디어 하이브리드 태그 인터페이스 시스템 및 인터페이싱 방법
KR20060036779A (ko) * 2004-10-26 2006-05-02 봉 경 김 코드 인식기능을 구비한 마우스

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990008541A (ko) * 1997-07-02 1999-02-05 윤종용 복합기의 인터페이스 장치 및 방법
KR20030005153A (ko) * 2001-07-05 2003-01-17 (주)우주커넥션스 바코드 및 이차원 코드 판독 장치
KR20060010179A (ko) * 2004-07-27 2006-02-02 주식회사 칼라짚미디어 하이브리드 태그 인터페이스 시스템 및 인터페이싱 방법
KR20060036779A (ko) * 2004-10-26 2006-05-02 봉 경 김 코드 인식기능을 구비한 마우스

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KR20090083231A (ko) 2009-08-03
WO2009096711A3 (fr) 2009-10-01

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