GazoPa is a similar image search service on the web in open beta by Hitachi. Users can search images from the web based on user's own photo, drawings, images found on the web and keywords. GazoPa enables users to search for a similar image from characteristics such as a color or a shape extracted from an image itself. Since GazoPa uses image features to search other similar images, a vast range of images can be retrieved from the web.
Gazopa recently added "stock photo" to its search engine results page -- just click 'stock photo' tab on search result pages. It enables you to search for similar images among stock photos. A keyword search for home furniture and a click on that tab brings up results like this:
But it's not just about keyword search. With Gazopa, you've two other search options: upload an image or draw an image. At the moment, the stock photos are all coming from Shutterstock, but Gazopa says it'll add new sources to its database soon.
The image search engine has launched a couple other interesting projects within the past year: GazoPa Style is an image search engine dedicated to fashion products that also allows you to upload photos and search for similar items, and GazoPa Answers is a Q&A site based on images.