Yahoo has come up with the Search Assist feature to Image Search. Here is an example: If you want to search for flowers, and especially a rose in image search, then you can have a priview of the types of results that you'll get for red roses, Guns N' Roses or black roses before clicking on the suggestion. Here is a screen capture:
Ă˘â‚¬Ĺ“We recently launched Search Assist for image search to guide users to the answers they seek in a new way. To better enhance the search experience, we took a two-tiered approach to the query formulation and refinement process. In the first stage, we've maintained the same paradigm of text suggestions that have helped users of web search complete and refine queries. The second stage is new – from now on, Search Assist can be opened after a query is entered into the search box for users to preview sample thumbnails for the top related search terms.Ă˘â‚¬Âť -Yahoo!
Yahoo also said they will soon launch Search Assist for Images on Yahoo.com as well.