Purdue News Photo
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These before-and-after black-and-white photographs of macaws show how specialized methods can be used to reduce "banding" created by laser printers. Banding has been reduced in the upper image. The same methods developed at Purdue University to reduce banding also could be used to cause printers to embed features so that investigators would be able to trace documents to a specific printer. The technology could help law enforcement track counterfeit bills and forged documents to the printers on which they were created.
(Photo/George Chiu, Purdue University School of Mechanical Engineering)
The story accompanying this photograph can be seen by clicking this link to Delp.forensics
For more information about photographs, send e-mail to:
David Umberger
Associate Director
Purdue News Service
umberger@purdue.edu
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