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:
Mar. 04, 2008
Filed:
Feb. 07, 2005
Albert Lin, Taipei, TW;
Albert Lin, Taipei, TW;
Lite-On Technology Corporation, Taipei, TW;
Abstract
A method for adjusting image contrast has the steps of constructing a luminance histogram of an original image; acquiring an image characteristic of the luminance histogram; judging whether there is a peak wave or deviation of luminance existed in that image characteristic; determining a control point after performing a specific algorithm; deriving a linear equation from the control point and a contrast adjusting value in a Cartesian coordinate system; establishing a gamma table from the correspondent relationship between the horizontal and vertical axis in the coordinate, where the relationship can be calculated according to the linear equation; and finally generating a luminance value from the gamma look-up table using the input luminance of each pixel in the original image.