Patent ID: 11943416
Assignee: HYDRAGRAPHIX LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC B  H  A | IPC A  H

Claim 8:
9. A method of producing a redundantly printed security-enhanced document comprising a substrate with process color variable indicia representing variable information printed on the substrate, the process color variable indicia comprising a plurality of component colors, the method comprising:
determining a variable indicia illuminating light color temperature;
determining, utilizing an additive color model, a grayscale equivalent level of each component color of the process color variable indicia with each Red, Green, and Blue (RGB) channels;
determining each of the component colors of the process color variable indicia to ensure that the component colors exhibit a level greater than or equal to a predetermined Signal-to-Noise-ratio threshold relative to a background of the substrate surrounding the variable indicia when viewed in any of red, green, or blue channels of an additive color model as calculated by a Modified Weber's Fraction equation in at least one channel of the additive color model, such that a failure of the printing any one of the component colors of the process color variable indicia does not alter a meaning of the variable information represented by the other component color of the variable indicia;
sending instructions intended to cause print heads to print the component colors to form the process color variable indicia on the substrate with separate print heads; and
applying a scratch-off coating covering at least a portion of the process color variable indicia.