FastFusion: A Scalable Multi-projector System

Multi-projector systems offer both higher resolution and brightness by using a cluster of projectors, and it can provide better visual quality when compared to traditional systems using a single high performance projector. When we consider the high cost associated with high-end projectors, the use of multiple low cost projectors can reduce considerably the cost of such installation. This article presents the research and development of a scalable multi-projection system that enables the construction of virtual reality systems with a large number of projectors and graphics computers, and that is capable of achieving a high resolution display. We demonstrate the viability of such system with the development of a camera-based multi-projector system called FastFusion, which automatically calibrates casually aligned projectors to properly blend different projections. Our system software improves known algorithms in the literature for projector calibration and image blending. The main improvement is a more efficient distribution of the calibration process. In addition, since our library proposes a new architecture that is able to manage many projectors, it may lead to the development of Immersion Systems with retina resolution. FastFusion has been tested and validated by virtual reality applications. In this work, we analyze the visual performance of FastFusion in a CAVE system with three walls, eighteen projectors and nine computers.