Patent ID: 8248664

Claim:
An image processing apparatus comprising: a color determination unit configured to determine saturation of each pixel in RGB image data; a first edge determination unit configured to determine whether each pixel belongs to an edge region of a G signal of the RGB image data; a first achromatization unit configured to achromatize a pixel in a case that the saturation of the pixel is less than a predetermined value and the pixel belongs to the edge region of the G signal to obtain corrected RGB image data; a second edge determination unit configured to determine whether each pixel belongs to an edge region of an R signal of the RGB image data and whether each pixel belongs to an edge region of a B signal of the RGB image data; and a second achromatization unit configured to achromatize a pixel of the corrected RGB image data in a case that (1) the pixel belongs to the edge region of the R signal, (2) the pixel belongs to the edge region of the B signal, (3) the pixel is within a predetermined distance from the pixel achromatized by the first achromatization unit.