Lena Söderberg and Fabio Lanzoni have been used in research papers on image processing to measure advances in colour, transitions and sharp edges - but not witihout controversy.
http://www.dailymail.co.uk/sciencetech/article-3077572/How-Fabio-Playboy-helped-invent-internet-bizarre-photos-used-research-papers-revealed.html?ITO=1490&ns_mchannel=rss&ns_campaign =1490 ]More Detail Here[/url]