Patent ID: 11968345
Assignee: INNOVIEW SARL
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The method of claim 1, where creating the authenticable color halftone print is part of a fluorescent color reproduction workflow for creating, within an output halftone space, ink halftone separations comprising fluorescent inks, said workflow comprising the steps of
(a) selecting an input color image;
(b) scanning the output halftone space pixel by pixel and scanline by scanline;
(c) determining a corresponding location within the selected input color image;
(d) obtaining an image color at the corresponding location;
(e) accessing a previously established table that maps the image color to the surface coverages of the colorants formed by the fluorescent inks and by superpositions of the fluorescent inks;
(f) obtaining the surface coverages of the colorants from the previously established table;
(g) with the surface coverages of the colorants, accessing a screen element library and obtaining a juxtaposed dispersed dot halftone;
(h) reading from the juxtaposed dispersed dot halftone identifiers of the fluorescent inks; and
(i) copying the identifiers of the fluorescent inks onto the ink halftone separations;
wherein:
the ink halftone separations contain the sets of densely spaced segments indicating positions and areas of the authenticable color halftone print where the fluorescent inks are deposited and
the authenticable color halftone print formed by the fluorescent inks visible only under UV light is difficult to counterfeit.