ES2132156T3 - Metodo y aparato para detectar codigos de barras. - Google Patents

Metodo y aparato para detectar codigos de barras.

Info

Publication number
ES2132156T3
ES2132156T3 ES93112172T ES93112172T ES2132156T3 ES 2132156 T3 ES2132156 T3 ES 2132156T3 ES 93112172 T ES93112172 T ES 93112172T ES 93112172 T ES93112172 T ES 93112172T ES 2132156 T3 ES2132156 T3 ES 2132156T3
Authority
ES
Spain
Prior art keywords
elements
search step
search
signal along
characterizes
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES93112172T
Other languages
English (en)
Inventor
Luis Figarella
Mihael Klancnik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United Parcel Service of America Inc
United Parcel Service Inc
Original Assignee
United Parcel Service of America Inc
United Parcel Service Inc
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.)
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Application granted granted Critical
Publication of ES2132156T3 publication Critical patent/ES2132156T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/10821—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 further details of bar or optical code scanning devices
    • G06K7/1093—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 further details of bar or optical code scanning devices sensing, after transfer of the image of the data-field to an intermediate store, e.g. storage with cathode ray tube
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
    • G06K7/1443—Methods for optical code recognition including a method step for retrieval of the optical code locating of the code in an image
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
    • G06K7/1456—Methods for optical code recognition including a method step for retrieval of the optical code determining the orientation of the optical code with respect to the reader and correcting therefore
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1465—Methods for optical code recognition the method including quality enhancement steps using several successive scans of the optical code
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1469—Methods for optical code recognition the method including quality enhancement steps using sub-pixel interpolation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1486—Setting the threshold-width for bar codes to be decoded
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1491—Methods for optical code recognition the method including quality enhancement steps the method including a reconstruction step, e.g. stitching two pieces of bar code together to derive the full bar code

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Character Input (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cash Registers Or Receiving Machines (AREA)
  • Error Detection And Correction (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Image Processing (AREA)
  • Communication Control (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Image Analysis (AREA)

Abstract

UN SISTEMA PARA DETECTAR UN SIMBOLO DE CODIGO DE BARRAS (202, 1002, 1202) QUE RECIBE UNA IMAGEN BIDIMENSIONAL (200, 1000; 200) QUE CONTIENE EL SIMBOLO, DONDE EL SISTEMA NO POSEE UN CONOCIMIENTO A PRIORI DE LA ORIENTACION DEL SIMBOLO EN LA IMAGEN. EL SISTEMA EXPLORA LA IMAGEN EN UNA DIMENSION PARA LOCALIZAR UNA ZONA SILENCIOSA (1204) DEL SIMBOLO Y BUSCA LA IMAGEN EN UNA DIMENSION PARA IDENTIFICAR UN CARACTER DE COMIENZO/PARADA DEL SIMBOLO. UN SISTEMA PARA DECODIFICAR UN SIMBOLO DE CODIGO DE BARRAS QUE TIENE UNA PLURALIDAD DE ELEMENTOS RECIBE UNA SEÑAL REPRESENTATIVA DEL SIMBOLO. EL SISTEMA BUSCA LA SEÑAL EN UN PRIMER PASO DE BUSQUEDA (1228) PARA CARACTERIZAR EL ANCHO DE UNO DE LOS ELEMENTOS (1206). EL SISTEMA SELECCIONA A CONTINUACION UN SEGUNDO PASO DE BUSQUEDA (1230) A BASE DE PROYECTAR LO QUE HA ENCONTRADO EN EL PRIMER PASO DE BUSQUEDA EN UNA LINEA DE REFERENCIA (1226), DONDE LA LINEA DE REFERENCIA NO ES PARALELA NI AL PRIMER NI AL SEGUNDO PASO DE BUSQUEDA. EL SISTEMA BUSCA A CONTINUACIONLA SEÑAL EN EL SEGUNDO PASO DE BUSQUEDA PARA CARACTERIZAR EL ANCHO DE OTRO DE LOS ELEMENTOS. UN SISTEMA PARA DECODIFICAR UN SIMBOLO DE CODIGO DE BARRAS (1802) QUE TIENE TRES ELEMENTOS POR LO MENOS (1806, 1808, ... 1838) RECIBE UNA SEÑAL REPRESENTATIVA DEL SIMBOLO. EL SISTEMA CARACTERIZA PRIMER UN PRIMER GRUPO DE DOS O MAS ELEMENTOS A BASE DE BUSCAR LA SEÑAL DEN UN PRIMER PASO DE BUSQUEDA (1840). EL SISTEMA CARACTERIZA TAMBIEN UN SEGUNDO GRUPO DE DOS O MAS ELEMENTOS A BASE DE BUSCAR LA SEÑAL EN UN SEGUNDO PASO DE BUSQUEDA (1842), DONDE EL PRIMER GRUPO Y EL SEGUNDO GRUPO TIENEN UN ELEMENTO EN COMUN Y DONDE EL PRIMER Y EL SEGUNDO PASO DE BUSQUEDA NO SON COLINEALES. EL SISTEMA CARACTERIZA EL ELEMENTO COMUN UTILIZANDO LA PRIMERA Y LA SEGUNDA CARACTERIZACIONES.
ES93112172T 1992-08-10 1993-07-29 Metodo y aparato para detectar codigos de barras. Expired - Lifetime ES2132156T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/927,910 US5343028A (en) 1992-08-10 1992-08-10 Method and apparatus for detecting and decoding bar code symbols using two-dimensional digital pixel images

Publications (1)

Publication Number Publication Date
ES2132156T3 true ES2132156T3 (es) 1999-08-16

Family

ID=25455441

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93112172T Expired - Lifetime ES2132156T3 (es) 1992-08-10 1993-07-29 Metodo y aparato para detectar codigos de barras.

Country Status (7)

Country Link
US (2) US5343028A (es)
EP (2) EP0880103B1 (es)
AT (1) ATE178150T1 (es)
DE (2) DE69334290D1 (es)
DK (1) DK0582911T3 (es)
ES (1) ES2132156T3 (es)
GR (1) GR3030103T3 (es)

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DK0582911T3 (da) 1999-10-11
EP0582911A3 (en) 1995-04-19
US5343028A (en) 1994-08-30
EP0880103B1 (en) 2009-07-15
DE69324079T2 (de) 1999-09-30
EP0880103A2 (en) 1998-11-25
EP0880103A3 (en) 2002-10-23
ATE178150T1 (de) 1999-04-15
US5478999A (en) 1995-12-26
EP0582911A2 (en) 1994-02-16
GR3030103T3 (en) 1999-07-30
DE69334290D1 (de) 2009-08-27
EP0582911B1 (en) 1999-03-24
DE69324079D1 (de) 1999-04-29

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