"Based on the proceedings of the symposium held at Photonics East 1999 in Boston on September 20-21, 1999, sponsored by SPIE, the International Optical Engineering Society, Bellingham, WA 98227-0010, USA; ICAI, the International Center for Art Intelligence, Culver City, CA 90230-5109, USA; FFE, Fakes, Forgeries, and Experts, Castagnola, CH-6976, Switzerland." Includes bibliographical references.