Patent ID: 8200008

Claim:
An image processing device for reducing color artifact, comprising: a smooth unit, for receiving color signal corresponding to a pixel and adjacent pixels, and performing a smooth operation on the color signal to generate a smooth color signal relating to the pixel; a level shifter, for receiving the color signal and a luminance signal corresponding to the pixel, and performing a level-shifting on the color signal based on the luminance signal to generate a level-shifted color signal; a color strength unit, for receiving the color signal, and calculating a color strength indicator corresponding to the pixel based on the color signal; a gray level decision unit, connected to the color strength unit, for determining whether the pixel is in a gray level region or not based on the color strength indicator corresponding to the pixel and the adjacent pixels to generate a gray level indicator of the pixel; and an adjustment unit, connected to the smooth unit, the level shifter, and the gray level decision unit, for adjusting the smooth color signal and the level-shifted color signal based on the gray level indicator to generate an output color signal of the pixel.