Camera Based Calibration Techniques for Seamless Flexible Multi-Projector Displays

Multi-projector large-scale displays are commonly used in scientific visualization, VR, and other visually intensive applications. In recent years, several camera-based computer vision techniques have been developed that help reduce the effort needed to construct tiled projection-based display such that they are seamless both in terms of geometry and color. These automated techniques have replaced the traditional labor intensive manual deployment by using cameras to “calibrate” display geometry and photometry, computing per-projector corrective warps and intensity correction to create seamless imagery across projector mosaics. These techniques have made projector-based displays cost-effective, low-maintenance, and flexible. In this paper, we present a summary of the different camera-based geometric and color registration techniques. Several techniques have been proposed and demonstrated, each addressing particular display configurations and modes of operation. We overview each of these approaches and discuss their advantages and disadvantages.