CPC G06T 5/009 (2013.01) [G06F 1/03 (2013.01); G06T 5/40 (2013.01); G09G 5/003 (2013.01); G09G 5/22 (2013.01); G06T 2207/10016 (2013.01); G06T 2207/20021 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0238 (2013.01); G09G 2320/0626 (2013.01)] | 18 Claims |
1. An image data processing device comprising:
a representative-brightness value calculating circuit configured to analyze original image data of a video image divided into a plurality of blocks and to calculate a representative brightness value for a block of the plurality of blocks; and
a black-image data analyzing circuit configured to generate a first modified representative brightness value based on a gamma variable and a ratio related to the black image data using an amount of black image data included in the block and the calculated representative brightness value, wherein
the first modified representative brightness value is smaller when the gamma variable is less than 1 as compared to when the gamma variable is greater than 1.
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