If this sort of thing fascinates you, here's a related approach: http://grail.cs.washington.edu/projects/query/ http://grail.cs.washington.edu/projects/query/ .

If this sort of thing fascinates you, here's a related approach: http://grail.cs.washington.edu/projects/query/ http://grail.cs.washington.edu/projects/query/ .. for some reason numerous people were working on image search features like this (i.e. draw what you want to find) 10 years ago but they don't seem to have caught on other than with Google Images.