About Image Research
Most images are not online
Due to copyright restrictions and other factors, only a tiny fraction of the world's images have been digitized. The majority of the images needed for research purposes are found in books, magazines, or photographic image archives.
Locating print sources and scanning is often the best way to find exactly what you need. Copyright generally allows one copy of an image to be scanned for research use and classroom presentation.
Large & Broad Image Databases
Image databases and image searching in collections of journal articles.