Search Assist for images has already been launched on the search results page and we’ll be launching it on Yahoo.com soon. If Yahoo is able to complete the feature, defiantly it must be an eye catching feature for Yahoo Image Search.

According Yahoo Search Blog

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.

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