Methods and system for verifying an authenticity of a printed item
A method of verifying an identity of a printed item includes capturing an image of the unverified printed item, wherein the unverified printed item includes artifacts and at least some of the artifacts were not controllably producible in producing the unverified printed item; extracting information associated with the artifacts of the unverified printed item; ranking the information associated with the artifacts of the unverified printed item; retrieving stored ranked information associated with artifacts of an original printed item from a storage device; and in each of a first and second range of magnitudes, comparing the ranked information associated with the artifacts of the unverified printed item with the ranked information associated with the artifacts of the original printed item.
1. A system for verifying an authenticity of a printed item, the system comprising:
an image acquisition device that acquires an image of the printed item; and
one or more processors that carry out actions comprising:
receiving the image from the image acquisition device;
analyzing the image to identify imperfections in the printed item,
wherein the imperfections are associated with metrics of a plurality of magnitudes;
retrieving a genuine mark signature from a database of genuine mark signatures,
wherein the genuine mark signature is based on imperfections of an original printed item,
wherein the genuine mark signature contains data of a plurality of magnitudes;
in a first range of magnitudes of the identified imperfections and the genuine mark signature, comparing the identified imperfections with the genuine mark signature;
in a second range of magnitudes of the identified imperfections and the genuine mark signature, comparing the identified imperfections with the genuine mark signature;
wherein the second range of magnitudes includes imperfections smaller than a smallest imperfection in the first range; and
when a difference between the identified imperfections and the genuine mark signatures is greater for the second range than for the first range by more than a threshold amount, identifying the printed item as a copy.
2. The system of claim 1 , wherein the printed item includes coded information regarding a manufactured item.
3. The system of claim 2 , wherein
the coded information includes a unique identifier, and
the one or more processors retrieve the genuine mark signature from the database using the unique identifier.
4. The system of claim 1 , wherein the printed item is a logo.