[Courtesy of the University of Southern California, Signal and Image Processing Institute database.] The Lena test image began as the November 1972 Playboy Magazine centerfold. Through folding, tearing, or cropping (accounts differ), it was transformed into an early digital test image by pioneering image engineers at the University of Southern California. The Lena image went on … More Dylan Mulvin (Microsoft Research), “Clipped, Cropped, Scanned: The Lena Image and the Making of a Test Medium”