Emphasis added.

Back in June, Google released a fascinating research paper that looked at building a webscale landmarkrecognition engine. The goal is to get computers to recognize landmarks for example, the Eiffel Tower, the Lincoln Memorial, or the example Google shares the Acropolis. This is no easy task when the engine has to rely on images of the landmarks, which are incredibly varied by angle, lighting, photo quality, etc.This was just a research paper, and not a Google product, but one can only imagine where this research will lead with regards to how Google handles image searches.