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:
May. 10, 2016
Filed:
Oct. 09, 2012
Eizo Corporation, Ishikawa, JP;
Reo Abe, Ishikawa, JP;
Masashi Nakao, Ishikawa, JP;
EIZO Corporation, Ishikawa, JP;
Abstract
An object is to correct gradations in such a manner that both halo reduction effect and Retinex calculation effect are satisfied. Each JND value corresponding to each obtained luminance value to be assigned to each unit gradation of a panel is obtained. A pixel value corresponding to the each JND value is obtained for each of the unit gradations of the panel. A threshold ε is obtained by inverse gamma-correcting the ratio between discernible JND values corresponding to the unit gradations of the panel and the maximum output value of the panel. Linear function-based approximations are obtained using least squares. The threshold ε is determined as an increasing function of a pixel value on the basis of the allowable number of JND steps. The threshold ε is changed using this function. The threshold ε can be changed according to the center pixel value.