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:
Sep. 05, 2000
Filed:
Apr. 23, 1999
Shaun Timothy Love, Lexington, KY (US);
Stuart Willard Daniel, Lexington, KY (US);
Steven Frank Weed, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A method of converting a first set of input color values, such as RGB color values, into a set of device colorants, such as CMY color values, includes the step of providing a look-up table associating a respective, predetermined set of CMY color values with each of a plurality of selected sets of RGB color values. The first set of RGB color values includes a first red color value, a first green color value and a first blue color value. A first random number is added to the first red color value to obtain a randomized red color value. A second random number is added to the first green color value to obtain a randomized green color value. A third random number is added to the first blue color value to obtain a randomized blue color value. Each of the randomized red color value, the randomized green color value and the randomized blue color value are compiled together to obtain a set of randomized RGB color values. A closest one of the selected sets of RGB color values in the look-up table is determined which is closest to the set of randomized RGB color values. The first set of RGB color values is converted into a set of CMY color values that is associated with the closest one of the selected sets of RGB color values in the look-up table. The random numbers which are added to the original RGB values are derived through a deterministic process based on the low order bits of those values.