Patent ID: 11915093
Assignee: NEC CORPORATION OF AMERICA
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A system for decoding data encoded in patterns perceptible in infrared spectral range, comprising:
at least one processor configured to execute a code, the code comprising:
code instructions to receive at least one infrared image depicting, in at least one infrared spectral range, a composite printed pattern constructed of at least a first partial pattern printed using a first paint material and a second partial pattern printed using a second paint material, the first and second paint materials are characterized by: (1) light reflected by the first paint material in visible light spectral range deviates less than a first value from the light reflected by the second paint material, and (2) light reflected by the first paint material in the at least one infrared spectral range deviates more than a second value from the light reflected by the second paint material;
code instructions to analyze the at least one infrared image to identify the first partial pattern and/or the second partial pattern separated from each other; and
code instructions to decode data encoded in the first partial pattern and/or in the second partial pattern;
wherein the first partial pattern and the second partial pattern are indistinguishable from each other in the visible light spectral range thus appearing to the human eye as the composite printed pattern such that the data encoded in at least one of the first partial pattern and the second partial pattern is invisible.