| الوصف: |
Thesis (Ph. D.)--University of Rochester. Department of Electrical and Computer Engineering, 2021. ; Multiprimary displays, i.e., display systems with four or more primaries, offer two key advantages over traditional three-primary displays: multiprimary displays can enlarge the gamut, i.e., the range of colors that can be rendered using additive combinations of the primaries with modulated intensities; and multiprimary displays may render a color using multiple alternative primary combinations. Such flexibility can be exploited for optimizing display performance, motivating the characterization of the gamut and the flexibility available for color control. Despite the advantages, additional primaries also bring challenges for color management. Color management for a multiprimary display requires the determination of a color control function (CCF) that specifies control vectors, i.e., vectors of the relative intensities of the primaries, for reproducing each color in the gamut. Multiprimary displays offer alternative choices of CCFs, which render colors identically under ideal conditions. However, deviations in the spectral distributions of the primaries and the diversity of cone sensitivities among observers impact alternative CCFs differently, and, in particular, make some CCFs prone to artifacts in rendered images. This thesis advances theory required for multiprimary display modeling, design, and color management, by providing (1) a unified and comprehensive framework for the characterization of the gamut and color control for multiprimary displays and (2) a framework for analyzing and optimizing CCFs for robustness against primary and observer variations. Observing that the gamut of multiprimary displays is known to be a zonotope, we develop a complete, cohesive, and directly usable mathematical characterization of the geometry of the multiprimary gamut zonotope that immediately identifies the surface facets, edges, and vertices and provides a parallelepiped tiling of the gamut. We provide a complete ... |
