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:
Jun. 06, 2006
Filed:
Jul. 02, 2001
Kryzstof Antoni Zaklika, Saint Paul, MN (US);
Mikhail Evgen'evich Tatarnikov, St. Petersburg, RU;
Vassily Borisovich Makulov, St. Petersburg, RU;
Kryzstof Antoni Zaklika, Saint Paul, MN (US);
Mikhail Evgen'evich Tatarnikov, St. Petersburg, RU;
Vassily Borisovich Makulov, St. Petersburg, RU;
Corel Corporation, Ottawa, CA;
Abstract
A method corrects a color image by avenging at least two color channels in regions near the minimum of histograms of the at least two color channels; selecting the smallest of the avenge color values as a black point; averaging at least two color channels in regions near the maximum of the histograms of the at least two color channels and selecting the largest of the avenge color values as the white point; and correcting the at least two color channels by adjusting the smallest and the largest color averages to respectively match the valves of the black point and the white point to form corrected image data. A preferred method limits the adjustment to a predetermined amount of clipping of the at least two color channels.