I had NO idea this was a thing...
"Lenna is a standard test image used in the field of digital image processing starting in 1973, but it is no longer considered appropriate by some authors. It is a picture of the Swedish model Lena Forsén, shot by photographer Dwight Hooker, cropped from the centerfold of the November 1972 issue of Playboy magazine."
https://en.wikipedia.org/wiki/Lenna
IEEE has stopped accepting papers with this image.
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