Patent ID: 8917422

Claim:
A method comprising: receiving, by a computer processor of a computing system, a print command for printing a first image; generating, by said computer processor in response to said print command, a first printed copy of said first image; receiving, by said computer processor, a selection of specified barcodes for objects of said first image of said first printed copy; generating, by said computer processor, said specified barcodes; associating, by said computer processor in response to said generating, said specified bar codes with said objects; receiving, by said computer processor in response to said associating, a barcode print command for printing said specified barcodes over associated objects of said objects; and generating, by said computer processor in response to said barcode print command, a copy of said first image comprising said each of said specified barcodes over said associated objects, wherein said generating comprises enabling an ink spray nozzle, wherein said ink spray reproduces, in invisible ink, invisible copies of each of said specified barcodes, wherein each invisible copy of said invisible copies is placed over an associated object of said associated objects, wherein each said invisible copy is invisible under first lighting conditions, and wherein each said invisible copy is visible under second lighting conditions.