Finding Images in Ebsco databases, like Academic Search Complete :
contains articles with images from scholarly and general publications. Images may include photos (color or black & white), illustrations, graphs, charts, tables, time lines and maps. Also includes images from United Press International (UPI) news agency.
allows you to search for articles with images and just images with captions.
Use Advanced Search. Enter your search terms and limit your results by selecting the kinds of images you're looking for.