Are there software programs available to aid in image identification?

A number of search engines now support image identification or reverse image searching, including the specialized TinEye search engine and Google Image Search. These search engines can help to identify images, find Web pages containing a particular image, and can also search for images that are similar to an image.

Reverse image search engines are often limited by the number of similar images that they have previously indexed when attempting to identify a particular image. Images of famous landmarks or celebrities are often easier to identify than other types of images due to the larger number of images matching the search image on the Web.