Book excerpt: Large-area high-resolution displays are essential for scientific visualization, entertainment, and defense applications. A popular way to realize such displays is to tile multiple projectors together to create one large display. As opposed to a 19 diagonal monitor with a resolution of 60 pixels per inch, tiled multi-projector displays are often 10' x 8' and have a resolution of 100-300 pixels per inch. The research in this area spans several traditional areas in computer science, including computer vision, computer graphics, image processing, human-computer interaction, and visualization tools. This book shows how to make such displays inexpensive, flexible, and commonplace by making them both perceptually and functionally seamless. In addition, the use of multi-projector techniques in large-scale visualization, virtual reality, computer graphics, and vision applications is discussed.