Camera-based calibration techniques for seamless multiprojector displays

Abstract

Abstract-Multi-projector, large-scale displays are used in scientific visualization, virtual reality and other visually intensive applications. In recent years, a number of camera-based computer vision techniques have been proposed to register the geometry and color of tiled projectionbased display. These automated techniques use cameras to "calibrate" display geometry and photometry, computing per-projector corrective warps and intensity corrections that are necessary to produce seamless imagery across projector mosaics. These techniques replace the traditional labor-intensive manual alignment and maintenance steps, making such displays cost-effective, flexible, and accessible.In this paper, we present a survey of different camerabased geometric and photometric registration techniques reported in the literature to date. We discuss several techniques that 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. We examine techniques that address registration on both planar (video walls) and arbitrary display surfaces and photometric correction for different kinds of display surfaces. We conclude with a discussion of the remaining challenges and research opportunities for multi-projector displays.

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“…On the other hand, the relation should be corresponded on a pixel to pixel level [8,9]. This technique is well discussed by Brown et al [10].…”

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“…It is out of the scope of this chapter to describe photometric calibration techniques (such as chrominance mapping and luminance matching) and other multi-projector methods, such as cross-fading, or shadow removal. The interested reader is referred to (Brown, 2005) for an overview of this area. This chapter does also not describe other important issues related to projector-based augmentation, such as projector hardware (electronic and optics), tracking and registration, networked rendering frameworks, projector-based interaction techniques and devices, etc.…”