This book constitutes the refereed proceedings of the 7th International Workshop on Field Programmable Logic and Applications, FPL '97, held in London, UK, in September 1997. The 51 revised full papers in the volume were carefully selected from a large number of high-quality papers. The book is divided into sections on devices and architectures, devices and systems, reconfiguration, design tools, custom computing and codesign, signal processing, image and video processing, sensors and graphics, color and robotics, and applications.