The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 1991
Filed:
Oct. 11, 1990
Joji Tajima, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Based on a first color distribution which is formed by a first color in a color domain illuminated by an optical beam of a source color and is stored in a memory as picture elements, each representing an original color value, simulation is carried out for a second color distribution which will be formed in the color domain by a second color. For the first and second color distributions, a color space is defined by three primary colors with its origin used to represent black. An intermediate color value is calculated for each picture element with the original color values of the respective picture elements represented on a first color plane defined in the color space by the origin and the first and the source colors. By using the intermediate color values of the respective picture elements, new color values are calculated for the second color distribution with the new color values of the respective picture elements represented on a second color plane defined in the color space by the origin and the second and the source colors. Preferably, the intermediate color values are clustered into clusters representative of a predetermined number, such as 256, of discrete colors for use in representing the first and second color distributions by color codes assigned to the respective clusters.