Active Projector: Image correction for moving image over uneven screens
Nobutatsu Nakamura, Ryuichi Hiraike · 2002
INTRODUCTION Projectors have had a small and light body, bright and fine images and a wireless function. These mobile projectors are often used for large screen presentation at customer’s office and the projector and the screen need to be settled in right position to avoid keystone distortion. It is expected to correct the distortion automatically by measuring screen distance and slant. Furthermore, since high performance and mobile projectors can be used at various scenes, it is required to adjust projector parameters such as geometric image correction, color, brightness, zoom and focus corresponding to the environment. We describe a geometric image correction method using screen surface shape data measured by a camera.