Doesn't mention that directly image collections (e.g. flickr or artstor) but this is potentially quite relevant to that.
New Weapon in Web War Over Piracy
By BRAD STONE and MIGUEL HELFT
Published: February 19, 2007
Content-recognition software could address a major entertainment industry concern— songs and videos being posted on the Web without permission.
http://www.nytimes.com/2007/02/19/technology/19video.html?ex=1329541200&en=ac662a919b4ff2cb&ei=5124&partner=permalink&exprod=permalink
