List of sites (intended for computer vision use) from CMU.

The history of one of the most well-known test images: Lena Sjooblom.

Database of facial expression images freely available for research purposes.

Information about Lena Soderberg (née Sjööblom) and the history of the famous test image.

A collection of digitised images in TIFF format. Catalogue in PDF. Previews and images free on-line, database on magnetic tape can be purchased.

The Visible Human Project has many medical images.