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:
Feb. 18, 2003
Filed:
Sep. 21, 1999
Anoop Bhattacharjya, Sunnyvale, CA (US);
Tsung-Nan Lin, San Jose, CA (US);
Joseph Shu, San Jose, CA (US);
Seiko Epson Corporation, Tokyo, JP;
Abstract
An apparatus and method for improving a color space transformation between an input device such as a scanner and an output device such as a printer. The color space transformation includes a first three-dimensional look up table that receives color information from the input device and transforms colors specified in an input device color space into colors in a device-independent color space, and a second three-dimensional look up table that receives colors from the first three-dimensional look up table and transforms colors specified in a device-independent color space into colors in an output device color space. The method includes inputting sample images with the input device and outputting those sample images with the output device, identifying areas in the sample images output by the output device where contouring appears, forming a list of colors corresponding to the identified areas, identifying nodes in the second three-dimensional look up table encompassing the list of colors, and smoothing the set of nodes.