CPC H04N 9/73 (2013.01) [G06T 3/4015 (2013.01); G06T 3/4038 (2013.01); H04N 9/04515 (2018.08); H04N 9/04555 (2018.08); H04N 9/735 (2013.01)] | 20 Claims |
1. A demosaic operation circuit, comprising:
a white pixel value estimation circuit suitable for acquiring an RGB channel average value and a directional gradient value of a white pixel for each direction using source pixel data provided from a pixel array having a plurality of pixels, and estimating a white pixel value based on the RGB channel average value and the directional gradient value of the white pixel for each direction;
a fine adjustment circuit suitable for finely adjusting an estimated white pixel value by removing a noise through a different filter based on weight values which are differently allocated according to a gradient of a center pixel and a neighboring white pixel;
a chroma estimation circuit suitable for estimating a chroma for each channel by calculating a chroma array based on the source pixel data and a finely adjusted white pixel value; and
a color correction circuit suitable for correcting a color based on the finely adjusted white pixel value and the chroma for each channel.
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