Color Seamlessness in Multi-Projector Displays Using Constrained Gamut Morphing

Abstract

Multi-projector displays show significant spatial variation in 3D color gamut due to variation in the chromaticity gamuts across the projectors, vignetting effect of each projector and also overlap across adjacent projectors. In this paper we present a new constrained gamut morphing algorithm that removes all these variations and results in true color seamlessness across tiled multiprojector displays. Our color morphing algorithm adjusts the intensities of light from each pixel of each projector precisely to achieve a smooth morphing from one projector's gamut to the other's through the overlap region. This morphing is achieved by imposing precise constraints on the perceptual difference between the gamuts of two adjacent pixels. In addition, our gamut morphing assures a C1 continuity yielding visually pleasing appearance across the entire display.We demonstrate our method successfully on a planar and a curved display using both low and high-end projectors. Our approach is completely scalable, efficient and automatic. We also demonstrate the real-time performance of our image correction algorithm on GPUs for interactive applications. To the best of our knowledge, this is the first work that presents a scalable method with a strong foundation in perception and realizes, for the first time, a truly seamless display where the number of projectors cannot be deciphered.

A Scalable Distributed Paradigm for Multi-User Interaction with Tiled Rear Projection Display Walls

“…We believe that our paradigm can extend to 3D applications, however we would like to explore the different issues in detail. We would also explore designing distributed versions of the more rigorous photometric calibration methods like [22,28].…”

“…We have seen a large amount of work on camera-based registration of multiple projectors in such displays, both for geometry and color [25,8,4,21,22,2,3,28]. This has enabled easy deployment and maintenance of such displays.…”

A Distributed Memory Hierarchy and Data Management for Interactive Scene Navigation and Modification on Tiled Display Walls

“…Bhasker et al [3], and Sajadi et al [52,51,53]. Figure 3.2 shows such an adjacency graph for a 3 × 3 array of 9 projectors, the prototype system we use in this manuscript.…”

A software-hardware cooperative method for multi-projector seamless tiled display system

“…Y. Chen et al [8] proposed an automatic calibration method that relies on an un-calibrated camera, and a computer vision based geometric calibration method was introduced in [9]. [10] and [11] presented algorithms for color calibration. A multi-projector seamless tiled display system for the marine simulator was introduced in [12].…”