GB1290252A - - Google Patents

Info

Publication number
GB1290252A
GB1290252A GB1290252DA GB1290252A GB 1290252 A GB1290252 A GB 1290252A GB 1290252D A GB1290252D A GB 1290252DA GB 1290252 A GB1290252 A GB 1290252A
Authority
GB
United Kingdom
Prior art keywords
elements
white
black
ratio
bit
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
Application number
Other languages
English (en)
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 filed Critical
Publication of GB1290252A publication Critical patent/GB1290252A/en
Expired legal-status Critical Current

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
    • G06K7/10881—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 constructional details of hand-held scanners
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06018—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding
    • G06K19/06028—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding using bar codes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Recording Measured Values (AREA)
  • Character Input (AREA)
GB1290252D 1970-03-26 1970-03-26 Expired GB1290252A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1471670 1970-03-26

Publications (1)

Publication Number Publication Date
GB1290252A true GB1290252A (fr) 1972-09-27

Family

ID=10046243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290252D Expired GB1290252A (fr) 1970-03-26 1970-03-26

Country Status (5)

Country Link
JP (1) JPS5640420B1 (fr)
DE (1) DE2112089B2 (fr)
FR (1) FR2087845A5 (fr)
GB (1) GB1290252A (fr)
NL (1) NL171300C (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537426C2 (de) * 1975-08-22 1982-05-06 MSI Data Corp., Costa Mesa, Calif. Verfahren und Lesevorrichtung zum optischen Auslesen von strichcodierten Daten
US4118687A (en) * 1976-10-04 1978-10-03 Recognition Equipment Incorporated Portable OCR system
EP0178965A1 (fr) * 1984-09-18 1986-04-23 S.A.R.L. Manufacture Francaise Des Chaussures Eram Perfectionnement aux codes à lecture optique et lecteur pour l'exploitation desdits codes
FR2676295B1 (fr) * 1991-05-10 1996-02-23 Banque De France Procede de codage d'un fil de securite, notamment pour papier fiduciaire..
CN113227874A (zh) 2019-05-25 2021-08-06 国立大学法人东北大学 扫描镜及扫描镜的制造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548011A (en) * 1949-03-15 1951-04-10 Loyd T Frost Sonic teacher
US2887674A (en) * 1953-05-14 1959-05-19 Marchant Res Inc Pulse width memory units

Also Published As

Publication number Publication date
DE2112089A1 (de) 1971-10-14
NL7103941A (fr) 1971-09-28
NL171300B (nl) 1982-10-01
FR2087845A5 (fr) 1971-12-31
NL171300C (nl) 1983-03-01
JPS5640420B1 (fr) 1981-09-21
DE2112089C3 (fr) 1974-02-14
DE2112089B2 (de) 1973-07-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee