TinEye is an image search engine that employs image identification technology rather than keywords – you upload sample image (or give URL of the image) and the search engine will find for you images that has the similar shapes, concepts, characteristics.
The results can be the same image, modified version of the image or a different image altogether as seen below. Also, the naming of the images do not really matter in this case as long as they match in appearance.
If you want to see more examples of search results, see cool searches page.
Additionally they have iPhone app which allows you to search for products using your mobile phone’s camera. Just take a picture of the product to start searching for product info and reviews. Cool Stuff!