File:Tom DeFanti EVL demo.jpg

Summary
Tom DeFanti demonstrating some early (1970s) computer graphics technology at the Electronic Visualization Laboratory (EVL).

Source: Frame grabbed from "Excerpts from the Past: The Sandin Image Processor", a video consisting of short clips from early EVL documentation and videos.

Created by: Electronic Visualization Laboratory

Fair use rationale:
 * Purpose: the image is to be used in the article discussing EVL
 * Nature of work: the original video is factual in nature, being documentation of work done at EVL
 * Amount: the image is a single frame from a longer work, and also lacks the explanatory audio
 * Effect: the use should have no significant economic impact on the original work (which is not commercially available, to the best of my knowledge)