000228997 001__ 228997
000228997 005__ 20180913064356.0
000228997 013__ $$d20130718$$bUS$$cA1$$aUS2013181435
000228997 013__ $$bUS$$cB2$$aUS9085190
000228997 02470 $$2EPO Family ID$$a48779450
000228997 02470 $$2TTO$$a6.1418
000228997 037__ $$aPATENT
000228997 245__ $$aSynthesis of authenticable halftone images with non-luminescent halftones illuminated by a luminescent emissive layer
000228997 260__ $$c2012
000228997 269__ $$a2012
000228997 336__ $$aPatents
000228997 520__ $$aA method and computing system are proposed for producing an authenticable security device with two sides. The verso side is covered with a luminescent emissive variable intensity layer formed for example by invisible luminescent ink halftones and the recto side is covered with transmissive non-luminescent ink halftones. The backlit colors resulting from the emissions of the luminescent layer or resulting from illumination by normal white light through the transmissive non-luminescent ink halftones are predicted by a backlighting model. This model enables computing the surface coverages of the luminescent and/or non-luminescent ink halftones in order to obtain a desired color either under excitation light (UV light) or under normal white light. This enable creating authenticable backlit images substantially similar to pre-stored reference images, either under normal white light, under excitation light, or under both the normal white light and the excitation light.
000228997 6531_ $$adocument security
000228997 6531_ $$abacklighting
000228997 6531_ $$aluminescence
000228997 6531_ $$ahalftones
000228997 700__ $$aHersch, Roger D
000228997 700__ $$0242317$$g160214$$aAndres, Julien
000228997 909C0 $$0252085$$pTTO$$xU10021
000228997 909C0 $$xU10417$$0252034$$pLSP
000228997 909CO $$pIC$$ooai:infoscience.tind.io:228997
000228997 917Z8 $$x105390
000228997 937__ $$aEPFL-PATENT-228997
000228997 973__ $$aEPFL
000228997 980__ $$aPATENT