From a rough sketch with annotations, an algorithm finds photographs available on the internet to construct composite images. "We present a system that composes a realistic picture from a simple freehand sketch annotated with text labels. The composed picture is generated by seamlessly stitching several photographs in agreement with the sketch and text labels; these are found by searching the Internet."
Here it is on VIMEO:
It was one of the SIGGRAPH Asia 2009 papers