Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomoaki Uchida0
Shingo Kida0
Date of Patent
July 1, 2008
0Patent Application Number
109672690
Date Filed
October 19, 2004
0Patent Primary Examiner
Patent abstract
An input video signal is corrected based on a gradation correction curve. Generated first is histogram data which indicates distribution of each of a plurality of levels at which a luminance signal component of the input video signal is divided from the lowest to the highest luminance level per specific unit of image. Produced next is at least a first gain based on the distribution of the histogram data. At least the first gain and the histogram data are processed to produce a plural number of data for a gradation correction curve. The gradation correction curve is generated based on the plural number of data. The input video signal is then corrected based on the gradation correction curve.
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