EP 4051509 A1 20220907 - VERIFYING A SECURITY DOCUMENT ON THE BASIS OF DROPLET MORPHOLOGIES
Title (en)
VERIFYING A SECURITY DOCUMENT ON THE BASIS OF DROPLET MORPHOLOGIES
Title (de)
PRÜFUNG EINES SICHERHEITSDOKUMENTS AUF BASIS VON TRÖPFCHENMORPHOLOGIEN
Title (fr)
VÉRIFICATION D'UN DOCUMENT DE SÉCURITÉ SUR LA BASE DE MORPHOLOGIES DE GOUTTELETTES
Publication
Application
Priority
- DE 102019129491 A 20191031
- EP 2020080268 W 20201028
Abstract (en)
[origin: WO2021083951A1] The invention concerns a method for verifying a document. The method comprises: - receiving (302) a document (500, 700) having a document body (506) with an inkjet print of an image (502, 600) by means of a testing unit (800). The image contains first regions (414.1, 414.2) that contain inkjet droplets of a dye-based ink (216) and second regions (412.1, 412.2) that contain a pigment-based ink (214). The first regions are free of the pigment-based ink and the second regions are free of the dye-based ink. The pigment-based ink is not distinguishable from the dye-based ink under visible light. - recording (304) a test image portraying at least the inkjet print (502); - performing (306) an image analysis comprising: · capturing (308) the morphology of the inkjet droplets; and · reconstructing (310) a digital graphical pattern (404) from the test image on the basis of the droplet morphology; - comparing (312) the reconstructed graphical pattern with a reference value in order to verify the authenticity of the document.
IPC 8 full level
B42D 25/382 (2014.01); B41M 3/14 (2006.01); B42D 25/23 (2014.01); B42D 25/309 (2014.01); B42D 25/455 (2014.01); B42D 25/46 (2014.01); G07D 7/12 (2016.01)
CPC (source: EP)
B42D 25/23 (2014.10); B42D 25/309 (2014.10); B42D 25/382 (2014.10); B42D 25/455 (2014.10); B42D 25/46 (2014.10); G07D 7/005 (2017.04); G07D 7/12 (2013.01); G07D 7/20 (2013.01); G07D 7/206 (2017.04); B41M 3/144 (2013.01)
Citation (search report)
See references of WO 2021083951A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102019129491 A1 20210506; EP 4051509 A1 20220907; EP 4215377 A2 20230726; EP 4215377 A3 20230809; EP 4215378 A2 20230726; EP 4215378 A3 20230802; WO 2021083951 A1 20210506
DOCDB simple family (application)
DE 102019129491 A 20191031; EP 2020080268 W 20201028; EP 20799683 A 20201028; EP 23153358 A 20201028; EP 23153359 A 20201028