Image processing device and method for reducing color artifact

摘要

An image processing device and method is provided to reduce color artifact. A smooth unit performs a smooth operation on color signal corresponding to a pixel and adjacent pixels to generate smooth color signal. A level shifter performs a level-shifting on the smooth color signal to obtain level-shifted color signal. A color strength unit calculates a color strength indicator based on the color signal. A gray level decision unit is connected to the color strength unit for deciding whether the pixel is in a gray level region or not based on the color strength indicators of the pixel and adjacent pixels to generate a gray level indicator. An adjustment unit adjusts the smooth color signal and the level-shifted color signal based on the gray level indicator to generate an output color signal.