Steganographically encoded media object having an invisible colorant
First Claim
Patent Images
1. A system for detecting counterfeiting or forgery, the system comprising:
- a medium comprising;
(a) a substrate; and
(b) visible information formed from a plurality of colors displayed on the substrate;
wherein at least one of the colors includes at least one visible colorant and at least one invisible colorant which invisible colorant is imperceptible to the human eye and which invisible colorant absorbs, reflects or luminesces at wavelengths at or less than substantially 400 nanometers or at or more than substantially 800 nanometers; and
wherein the invisible colorant is not transferred to a photocopy for detecting counterfeiting or forgery;
a reader comprising an imaging device that detects the absence of invisible colorant in a counterfeit medium of the medium for detecting counterfeiting or forgery and detects presence of invisible colorants in the medium for indicating the actual medium.
18 Assignments
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Accused Products
Abstract
A medium for displaying information thereon, the medium includes a substrate; and visible information formed from a plurality of colors displayed on the substrate; wherein at least one of the colors includes at least one visible colorant and at least one invisible colorant which invisible colorant is imperceptible to the human eye and which is not present in a reproduction therefrom for detecting counterfeiting or forgery.
6 Citations
6 Claims
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1. A system for detecting counterfeiting or forgery, the system comprising:
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a medium comprising;
(a) a substrate; and
(b) visible information formed from a plurality of colors displayed on the substrate;
wherein at least one of the colors includes at least one visible colorant and at least one invisible colorant which invisible colorant is imperceptible to the human eye and which invisible colorant absorbs, reflects or luminesces at wavelengths at or less than substantially 400 nanometers or at or more than substantially 800 nanometers; and
wherein the invisible colorant is not transferred to a photocopy for detecting counterfeiting or forgery;
a reader comprising an imaging device that detects the absence of invisible colorant in a counterfeit medium of the medium for detecting counterfeiting or forgery and detects presence of invisible colorants in the medium for indicating the actual medium. - View Dependent Claims (2, 3)
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4. A method for detecting forgery or counterfeiting, the method comprising the steps of:
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(a) providing a substrate;
(b) inserting at least one invisible colorant that is imperceptible to a human eye on the substrate for permitting detection of a counterfeit of the substrate that will not have the invisible colorant;
wherein the invisible colorant absorbs, reflects or luminesces at wavelengths at or less than substantially 400 nanometers or at or more than substantially 800 nanometers; and
(c) inserting at least one visible colorant that is perceptible to the human eye on the substrate for permitting display on visible information on the substrate. - View Dependent Claims (5, 6)
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Specification