I use 'Google Image Search' almost every day. Every once in a while I will perform a Google 'Search by Image' search of a drawing of mine to see what pops up through the internet that is similar. I will upload a photo of a specific piece, and not only will Google display all the places that image exist, it will also display 'Visually Similar Images'. I'm essentially letting Google make associations for me. Most results are not too far off base, but a few are quite surreal.
I uploaded an image of the drawing on the left yesterday.
These were all in the first 20 images that Google found under 'Find Similar'.