Kenro Ohsawa

TL;DR: In this paper, a color reproduction system for calculating a display signal by the Lagrange's method of undetermined coefficients or the reduced gradient method was proposed, whereby a signal calculating section (22) minimizes a difference of two squares between a subject spectrum and a display spectrum of a remaining degree of freedom under the constricting condition that the colorimetric value of the subject spectrum calculated by a colourimetric calculated section (21) agrees with that of the display spectrum for a six-elementary-color display.

TL;DR: It is confirmed that the 6-primary display gives improved agreement between the original and reproduced colors, and the color reproduction results with different spectral distributions but same CIE tristimulus value are visually compared.

TL;DR: A color conversion method to reproduce the natural color by additive mixture of multiprimary colors is proposed and the result of the color reproduction is experimentally demonstrated by a six-primary projection display.

TL;DR: In this article, a color image projector is used to physically adjust positions of the image signals of four or more primary colors, which are projected onto the screen such that the positions of image signals are coincident with each other.

TL;DR: In this article, a six-band high-definition television (HDTV) camera system was proposed for accurate color reproduction of motion pictures based on spectral information, which has an optical component connecting the objective lens to two conventional HDTV camera heads whose spectral sensitivities are individually adjusted by placing different interference filters between the objective and each camera.