Yahoo! launched “Search Assist for Image Search” that’ll return images within the actual Search Assist bar for users to preview sample thumbnails for the top related search terms, refine queries. To generate search assist image results, go to Yahoo Image Search and begin typing. If the query is popular enough and can be refined, Yahoo will show images within a different refinement category. So in the example below, the first image on the left, is a refinement option to see [barack obama family] pictures.
In addition, after you search, you can click on the little up arrow under the search box, to open up Search Assist. This feature, i.e. opening the search assist box after a search, is new.
Yahoo! will be launching Search Assist for Images on Yahoo.com soon.