色彩科学から見たデジタルカラーイメージングの原理

Abstract

This article describes the fundamentals and the forefront technologies of digital color imaging associated with printing and hardcopy technologies with particular emphasis on color science. Firstly, the importance of paper media in human communication was traced back historically in terms of affinity of paper media to human being. The major parameters for high quality image reproduction on paper media are discussed from color science viewpoints, i.e., resolution, tone characteristics, color reproducibility, and sharpness.The future of paper media in multiphase media conditions, where paper media and electronic media coexist and compete with each other, was analyzed and the possibility of newly emerging paper market for the output from electronic media was pointed out.Finally, a new design concept for paper media for the 21 st century was proposed on the basis of the present status of the Paper Science Laboratory of the University of Tokyo. The new direction should be focused on the creation of an innovative “Graphic Arts Science” that combines “Paper Science” with peripheral sciences such as printing, imaging and color sciences.The overall contents are as follows.(1) Introduction.(2) Historical significance of digital color imaging viewed from the media theory.(3) Color technology for high quality image reproduction in digital color imaging.(4) Color reproduction theories in digital color imaging.(5) Digital color imaging in printing(6) Digital color imaging in hardcopy(7) Digital color imaging on display(8) 21 st century's media perspectives and possibilities of paper media.(9) Proposal of “Paper Science-based new Graphic Arts Science”.