WO2002045000A3 - Authenticatable graphical bar codes - Google Patents

Authenticatable graphical bar codes Download PDF

Info

Publication number
WO2002045000A3
WO2002045000A3 PCT/US2001/045072 US0145072W WO0245000A3 WO 2002045000 A3 WO2002045000 A3 WO 2002045000A3 US 0145072 W US0145072 W US 0145072W WO 0245000 A3 WO0245000 A3 WO 0245000A3
Authority
WO
WIPO (PCT)
Prior art keywords
authenticatable
bar codes
message
extracted
graphical bar
Prior art date
Application number
PCT/US2001/045072
Other languages
French (fr)
Other versions
WO2002045000A2 (en
Inventor
Jonathan Yen
Jr Gerald Q Maguire
Chit Wei Saw
Xu Yihong
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Priority to EP01987160A priority Critical patent/EP1340188B1/en
Priority to JP2002547091A priority patent/JP4495908B2/en
Priority to AU2002239401A priority patent/AU2002239401A1/en
Priority to DE60127165T priority patent/DE60127165T2/en
Publication of WO2002045000A2 publication Critical patent/WO2002045000A2/en
Publication of WO2002045000A3 publication Critical patent/WO2002045000A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G06T1/0028—Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/121—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by printing code marks
    • 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
    • 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
    • G06K19/06037—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 multi-dimensional coding
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0065—Extraction of an embedded watermark; Reliable detection

Abstract

Systems and methods for generating and decoding authenticatable graphical bar codes are described. In one aspect, a corroborative signed message is generated from information (12) to be encoded, and a base image (22) is modulated with a graphical encoding of the signed message to produce a marked image (14). In another aspect, a signed message is extracted from a marked image (14) and a base image (22). The extracted signed message is decoded to produce a decoded message. Information (12) encoded in the marked image (14) is extracted from the decoded message and authenticated.
PCT/US2001/045072 2000-12-01 2001-11-28 Authenticatable graphical bar codes WO2002045000A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01987160A EP1340188B1 (en) 2000-12-01 2001-11-28 Method of encoding a handwritten signature
JP2002547091A JP4495908B2 (en) 2000-12-01 2001-11-28 A method for machine coding based on a graphical two-dimensional code.
AU2002239401A AU2002239401A1 (en) 2000-12-01 2001-11-28 Authenticatable graphical bar codes
DE60127165T DE60127165T2 (en) 2000-12-01 2001-11-28 Signature encoding methods

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/728,292 US7107453B2 (en) 2000-05-25 2000-12-01 Authenticatable graphical bar codes
US09/728,292 2000-12-01

Publications (2)

Publication Number Publication Date
WO2002045000A2 WO2002045000A2 (en) 2002-06-06
WO2002045000A3 true WO2002045000A3 (en) 2003-01-30

Family

ID=24926240

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/045072 WO2002045000A2 (en) 2000-12-01 2001-11-28 Authenticatable graphical bar codes

Country Status (6)

Country Link
US (1) US7107453B2 (en)
EP (1) EP1340188B1 (en)
JP (1) JP4495908B2 (en)
AU (1) AU2002239401A1 (en)
DE (1) DE60127165T2 (en)
WO (1) WO2002045000A2 (en)

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Also Published As

Publication number Publication date
EP1340188A2 (en) 2003-09-03
US7107453B2 (en) 2006-09-12
EP1340188B1 (en) 2007-03-07
JP4495908B2 (en) 2010-07-07
JP2004526225A (en) 2004-08-26
DE60127165D1 (en) 2007-04-19
US20010047476A1 (en) 2001-11-29
AU2002239401A1 (en) 2002-06-11
DE60127165T2 (en) 2008-04-10
WO2002045000A2 (en) 2002-06-06

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