Professor Richard Hartley has made important scientific contributions in three areas: low dimension topology and Knot Theory; Computer-Aided Design of VLSI; and Computer Vision. His seminal work on the application of projective geometry to the analysis of image sequence initiated a new area of research that led to hundreds of papers by many authors in the past decade. This area became one of the major successes in Computer Vision in the 1990s. He wrote (with a co-author) the basic reference text for this subject and is considered to be one of a very small number of leading experts in this field.