Continuous System Calibration Using Non-visible Light

With the growing adoption of automatic systems for aligning the geometry of large multi-projector displays in venues such as flight or ship bridge simulators, it has become possible for even the most complicated visual systems to be realigned regularly to maintain seamless geometric alignment. Despite this ability, for the most part, these alignment systems still require that the system be taken off-line in order to project alignment patterns and recalibrate the system. This paper presents a method for both calibrating projection systems without interrupting the visible video feed of the image generator as well as continuously monitoring the geometry of the system and automatically triggering realignment when required using new projection technology which allows the simultaneous projection of both visible and non-visible (infrared) light.