WO2003068522A1 - Impression de securite - Google Patents

Impression de securite Download PDF

Info

Publication number
WO2003068522A1
WO2003068522A1 PCT/GB2003/000571 GB0300571W WO03068522A1 WO 2003068522 A1 WO2003068522 A1 WO 2003068522A1 GB 0300571 W GB0300571 W GB 0300571W WO 03068522 A1 WO03068522 A1 WO 03068522A1
Authority
WO
WIPO (PCT)
Prior art keywords
lines
security print
print according
image
security
Prior art date
Application number
PCT/GB2003/000571
Other languages
English (en)
Inventor
Ian Rodney Smith
Original Assignee
Ascent Systems Software Limited
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 Ascent Systems Software Limited filed Critical Ascent Systems Software Limited
Priority to AU2003205863A priority Critical patent/AU2003205863A1/en
Publication of WO2003068522A1 publication Critical patent/WO2003068522A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/146—Security printing using a non human-readable pattern which becomes visible on reproduction, e.g. a void mark

Definitions

  • This invention relates to security printing.
  • a security print proof against photocopying in which a primary image is rendered in a density modulation of pairs of lines, and a secondary image is applied to said primary image by altering the relationship between lines in a pair.
  • the relationship that is altered is spacing between lines in a pair.
  • the relationship that is altered maybe frequency of crossing of the lines in a pair.
  • the lines may be straight or wavy. Lines of each pair may cross at the edges of secondary image features, and may cross repeatedly within secondary image features, remaining parallel outside, or vice versa.
  • the line spacing of the primary image may be such as to render it capable of being copied by a photocopier, but the line spacing in the secondary image such as to be capable of resolution by a photocopier. Such a print will, of course, reveal its hidden image in a photocopy.
  • the lines may be dotted.
  • the print may be a monochrome print or a colour print, in which lines are made up of colour segments. When the lines are dotted, the dots may be made up of RBG or CMYX components.
  • the invention comprises a security print as above described in combination with a detector in the form of a lenticular screen of which the lenslets correspond to the line spacing of the primary image. Placing the screen over the print in register with the lines of the print will reveal the hidden image because there the lenslets will be out of register with the lines.
  • Figure 2 is a detail of a second security print
  • the print illustrated in Figure 1 has a primary image rendered as a density modulation of pairs of parallel wavy lines 11 , 12.
  • a secondary image is applied to the primary image - in this case, the letter "C” of the word “copy”, for example - by, within the confines of the "C", the spacing between the lines 11 , 12 reducing from “a” to "b".
  • the line spacing "a” is sufficiently small, the eye perceives the print as a continuous image, and can detect no difference within the "C”. It may be arranged, however, that the line spacing "A” is such as to be capable of being copied by a photocopier or scanner, while the spacing "b” is beyond the resolution of such an instrument.
  • the image may have spacings "a" and "b" which can be copied on a photocopier or scanner, the hidden image being revealed by placing over it, in register with the wavy lines, a lenticular detector screen having cylindrical lenslets which correspond precisely to those lines. If a copy is made otherwise than by a photocopier or scanner, the aberration in the lines in the hidden image will not be reproduced, but using the detector screen will reveal that there is not hidden image where there should be one.
  • Figure 2 illustrates how parallel lines can convert to repeatedly crossing lines at the edges of hidden image features.
  • the hidden image is the word COPY (of which, in the detail, only the letters C and O are shown).
  • the line pairs are parallel within the letters, chs-crossing outside.
  • the print may have two hidden images, one capable of being copied by a photocopier and one not.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Cleaning In Electrography (AREA)

Abstract

L'invention concerne une impression de sécurité à l'épreuve de la photocopie, dans laquelle une image primaire est rendue par une modulation de densité de paires de lignes, et une image secondaire est appliquée sur l'image primaire par modification de la relation entre les lignes constituant une paire.
PCT/GB2003/000571 2002-02-15 2003-02-08 Impression de securite WO2003068522A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003205863A AU2003205863A1 (en) 2002-02-15 2003-02-08 Security printing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0203577.2 2002-02-15
GB0203577A GB0203577D0 (en) 2002-02-15 2002-02-15 Security printing

Publications (1)

Publication Number Publication Date
WO2003068522A1 true WO2003068522A1 (fr) 2003-08-21

Family

ID=9931117

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000571 WO2003068522A1 (fr) 2002-02-15 2003-02-08 Impression de securite

Country Status (3)

Country Link
AU (1) AU2003205863A1 (fr)
GB (1) GB0203577D0 (fr)
WO (1) WO2003068522A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004022976A1 (de) * 2004-05-10 2005-12-08 Clemens Brüntrup Offset-Reproduktion GmbH Steganographisches Druckverfahren und Verifikationssystem

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046327A1 (fr) * 1980-08-20 1982-02-24 De Nederlandsche Bank N.V. Matière imprimée ayant des éléments pour indiquer la contrefaçon et méthode de fabrication d'une telle matière imprimée
DE3130182A1 (de) * 1981-07-30 1983-02-17 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Guillochenraster
DE3602563C1 (en) * 1986-01-29 1987-04-16 Deutsche Bundesbank Security paper with optically active structures generating a moiré effect
WO1995004665A1 (fr) * 1993-08-10 1995-02-16 Hardy Business Forms Limited Donnees imprimees incrustees, procede et appareil afferents
US5772249A (en) * 1994-11-01 1998-06-30 De La Rue Giori S.A. Method of generating a security design with the aid of electronic means
WO1998047715A1 (fr) * 1997-04-18 1998-10-29 De La Rue International Limited Structure d'image transitoire
EP0920383A1 (fr) 1996-08-21 1999-06-09 Baasel-Scheel Lasergraphics GmbH Imprime antifalsification
WO2001003944A1 (fr) * 1999-07-07 2001-01-18 Moore North America, Inc. Article protege contre les contrefaçons par copieur couleurs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046327A1 (fr) * 1980-08-20 1982-02-24 De Nederlandsche Bank N.V. Matière imprimée ayant des éléments pour indiquer la contrefaçon et méthode de fabrication d'une telle matière imprimée
DE3130182A1 (de) * 1981-07-30 1983-02-17 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Guillochenraster
DE3602563C1 (en) * 1986-01-29 1987-04-16 Deutsche Bundesbank Security paper with optically active structures generating a moiré effect
WO1995004665A1 (fr) * 1993-08-10 1995-02-16 Hardy Business Forms Limited Donnees imprimees incrustees, procede et appareil afferents
US5772249A (en) * 1994-11-01 1998-06-30 De La Rue Giori S.A. Method of generating a security design with the aid of electronic means
EP0920383A1 (fr) 1996-08-21 1999-06-09 Baasel-Scheel Lasergraphics GmbH Imprime antifalsification
WO1998047715A1 (fr) * 1997-04-18 1998-10-29 De La Rue International Limited Structure d'image transitoire
WO2001003944A1 (fr) * 1999-07-07 2001-01-18 Moore North America, Inc. Article protege contre les contrefaçons par copieur couleurs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004022976A1 (de) * 2004-05-10 2005-12-08 Clemens Brüntrup Offset-Reproduktion GmbH Steganographisches Druckverfahren und Verifikationssystem
DE102004022976B4 (de) * 2004-05-10 2010-09-16 Clemens Brüntrup Offset-Reproduktion GmbH Steganographisches Druckverfahren und Verifikationssystem

Also Published As

Publication number Publication date
AU2003205863A1 (en) 2003-09-04
GB0203577D0 (en) 2002-04-03

Similar Documents

Publication Publication Date Title
US8460781B2 (en) Infrared encoding of security elements using standard xerographic materials
US5149140A (en) Security, information document
US8455087B2 (en) Infrared encoding of security elements using standard xerographic materials with distraction patterns
EP1541368B1 (fr) Augmentation du lustre d'images ayant une basse ou haute densité optique
EP0490457B1 (fr) Support avec élément de sécurité
US5788285A (en) Document protection methods and products
JP3280083B2 (ja) 画像処理装置及び画像処理方法
EP0455750B1 (fr) Procede de production d'un document non reproductible
EP2080636A2 (fr) Document contenant des fonctions de sécurité de survie à balayage
EP1415828B1 (fr) Caractéristique anti-contrefaçon avec motifs à lignes
US8444181B2 (en) Single-color screen patterns for copy protection
US8228551B2 (en) Image processing method and image processing apparatus
US8164799B2 (en) Digitally printed color anti-copy document in any resolution and processes and products therefor
US20070086070A1 (en) Full Color Scanning Protection of a Document
JP2606064B2 (ja) 画像処理装置
US7512248B2 (en) Method of incorporating a secondary image into a primary image
EP1772006A1 (fr) Protection contre le scannage d'un document tout en couleur
WO2003068522A1 (fr) Impression de securite
US20070133023A1 (en) Document For Determining Interference Scanning Frequencies
US11386314B2 (en) Transparent pantograph pattern
KR100217385B1 (ko) 광간섭과 잠상현출에 의한 복사 위조방지 인쇄제품 및 그 제조방법
JP2008035448A (ja) 画像処理装置及び情報重畳方法
JP3293844B2 (ja) 画像処理装置およびその方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP