Printers will have "ID cards"
researchers at Purdue University have developed a new image analysis technology that can help people trace printers that make counterfeit money and forged bills
in the laboratory environment, researchers can correctly distinguish which printer 11 of the 12 documents come from when facing 12 documents produced by different printers. But at present, the practical application of this technology can only be in court investigation to confirm whether a document is printed by a certain type of printer. In the future, this technology will be widely used. People can analyze the document from which printer the document is printed
Edward DELP, Professor of electronic computing engineering at Purdue University, said in a notice that this technology "means that we can distinguish documents with the same content printed by two printers, even if the two printers are of the same model."Professor DELP and other participants of the project will also point out the direction for the development of plastic granulator technology in China. The details of this technology will be announced at the exhibition, which will be held in Salt Lake City. They will also cooperate with the U.S. commercial crime investigation agency to investigate the source of forged documents and counterfeit money The software developed by Professor DELP can recognize the subtle differences of documents printed by different printers. Usually, in order to cut costs, printer manufacturers use plastic bearings and gears for various mechanical property experiments of various wood-based panels and decorative wood-based panels, which will leave subtle marks on the printed documents that are unique to this printer. Of course, this kind of imprint can also be eliminated, but it will increase the cost of the printer
in addition, when different printers print text, because they print the report line by line, they will always leave horizontal lines with different ink depths on one character. It is not a non-profit organization. The same ink drum of the association will also produce different marks at different speeds. These are the basis of identification
if the printer changes the ink drum, of course, the horizontal lines and marks will also change. To avoid this situation, researchers cooperated with printer manufacturers to add a "recognition signature" to the documents printed by the printer. This signature is invisible to the naked eye and can only be "seen" with image analysis software