IT1120575B - Perfezionamento nei lettori ottici a soglia adattativa - Google Patents

Perfezionamento nei lettori ottici a soglia adattativa

Info

Publication number
IT1120575B
IT1120575B IT50262/79A IT5026279A IT1120575B IT 1120575 B IT1120575 B IT 1120575B IT 50262/79 A IT50262/79 A IT 50262/79A IT 5026279 A IT5026279 A IT 5026279A IT 1120575 B IT1120575 B IT 1120575B
Authority
IT
Italy
Prior art keywords
improvement
adaptive threshold
optical readers
threshold optical
readers
Prior art date
Application number
IT50262/79A
Other languages
English (en)
Other versions
IT7950262A0 (it
Inventor
Richard John Casaly
Original Assignee
Transaction Technology 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.)
Filing date
Publication date
Priority claimed from US06/036,686 external-priority patent/US4230265A/en
Application filed by Transaction Technology Inc filed Critical Transaction Technology Inc
Publication of IT7950262A0 publication Critical patent/IT7950262A0/it
Application granted granted Critical
Publication of IT1120575B publication Critical patent/IT1120575B/it

Links

Classifications

    • 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
    • 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
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (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)
  • Optical Recording Or Reproduction (AREA)
  • Credit Cards Or The Like (AREA)
IT50262/79A 1978-09-18 1979-09-14 Perfezionamento nei lettori ottici a soglia adattativa IT1120575B (it)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94320178A 1978-09-18 1978-09-18
US06/036,686 US4230265A (en) 1979-05-07 1979-05-07 Adaptive threshold optical reader

Publications (2)

Publication Number Publication Date
IT7950262A0 IT7950262A0 (it) 1979-09-14
IT1120575B true IT1120575B (it) 1986-03-26

Family

ID=26713392

Family Applications (1)

Application Number Title Priority Date Filing Date
IT50262/79A IT1120575B (it) 1978-09-18 1979-09-14 Perfezionamento nei lettori ottici a soglia adattativa

Country Status (11)

Country Link
AU (1) AU528801B2 (it)
BR (1) BR7905873A (it)
CA (1) CA1129549A (it)
CH (1) CH632098A5 (it)
DE (1) DE2937315A1 (it)
FR (1) FR2436448B1 (it)
GB (1) GB2031630B (it)
HK (1) HK6783A (it)
IT (1) IT1120575B (it)
NL (1) NL7906448A (it)
PH (1) PH19179A (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3855635T2 (de) * 1987-02-12 1997-05-28 Dainippon Printing Co Ltd Methode zur datenspeicherung und -wiedergabe für eine optische karte
FR2650416B1 (fr) * 1989-07-28 1995-04-21 Adventure Systeme de transmission d'informations, objet portatif et lecteur utilisables dans un tel systeme
EP1026619A3 (en) * 1999-02-04 2001-09-19 Matsushita Electronics Corporation Optical information reader and optical information reading system
JP2005072925A (ja) 2003-08-25 2005-03-17 Nec Kansai Ltd 光電流・電圧変換回路
JP2005072924A (ja) 2003-08-25 2005-03-17 Nec Kansai Ltd 光電流・電圧変換回路
DE102004024038A1 (de) * 2004-05-10 2005-12-01 Gardena Manufacturing Gmbh Programmiereinrichtung und Lesegerät für Bewässerungseinrichtungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100346A5 (it) * 1970-07-14 1972-03-17 Honeywell Inf Systems Italia
DE2153910C3 (de) * 1971-10-29 1974-10-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zum Auswerten des Ausgangssignals einer optischen Meßeinrichtung
US3789215A (en) * 1972-09-08 1974-01-29 Ibm Photosensitive document detector with automatic compensation
US3872434A (en) * 1973-12-05 1975-03-18 Recognition Equipment Inc Dynamic sample-by-sample automatic gain control

Also Published As

Publication number Publication date
GB2031630B (en) 1982-06-23
AU528801B2 (en) 1983-05-12
NL7906448A (nl) 1980-03-20
PH19179A (en) 1986-01-23
GB2031630A (en) 1980-04-23
FR2436448B1 (fr) 1986-10-17
FR2436448A1 (fr) 1980-04-11
HK6783A (en) 1983-02-24
CH632098A5 (fr) 1982-09-15
AU5027079A (en) 1980-03-27
IT7950262A0 (it) 1979-09-14
DE2937315A1 (de) 1980-03-27
CA1129549A (en) 1982-08-10
BR7905873A (pt) 1980-05-27

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970929