Patent ID: 8630505

Claim:
An image processing device, comprising: a color extractor circuit configured to extract color information from input image data; a color shifter circuit configured to color shift the input image data according to the extracted color information and to determine a gain responsive to the extracted color information; and a definition enhancement circuit configured to detect a color difference from the color-shifted image data and to unsharp mask filter the color-shifted image data according to the detected color difference, the definition enhancement circuit comprising: a filter configured to unsharp mask filter the color-shifted image data; a color difference and gain controller circuit configured to detect the color difference from the color-shifted image data and to adaptively modify or replace the unsharp mask filtered image data according to the detected color difference to generate adaptively processed image data, the color difference and gain controller circuit comprising a color difference detector circuit configured to detect the color difference by comparing image data for center pixels of respective groups of pixels of the color-shifted image data to image data for pixels surrounding the center pixels in the respective groups and an image data modification circuit configured to modify the unsharp mask filtered image data according to the detected color difference; and a gain multiplier circuit configured to apply the determined gain to the adaptively processed image data.