Improved Legibility of Text for Multiprojector Tiled Displays

Displaying small text on large multiprojector tiled displays is challenging. Problems arise because text is badly affected by the image-warping techniques that these displays apply to rectify projector misalignment. As a consequence, there has been little progress with important large-display applications that require small text, such as collaborative tutoring or Web-browsing. In this paper we present a new warping technique designed to preserve crisp text, based on recent work by Hereld and Stevens. Our technique produces good results, free of artifacts, when used in today´s multiprojector displays. We evaluate the legibility of our technique against conventional interpolation-based warping and find that users prefer our technique. We describe an efficient and reusable implementation, and show how the increased legibility has allowed us to investigate two new applications.