Patent ID: 7333236
Filing Date: 2008-02-19
Classification: H04N

Abstract:
1. A method for mapping color values of a color image that are represented as vectors in RGB (red, green, blue) color space onto color values of a highlight color image that only includes vectors in a highlight-color color space that covers a region in the RGB color space between all gray scale values and a highlight-color color, the method being performed by a computer program on a data carrier comprising the steps of: allocating a color value in the RGB color space to each picture element of the color image; prescribing a highlight-color color by a color vector in the RGB color space; determining a color part of the highlight-color color by vector subtraction of a black part from the color value; determining a color part of the color value to be mapped by vector subtraction of a black part from the color value; mapping the color values of the color image onto the color value of the highlight-color color space by determining a mapping factor by calculating a cosine between the color parts; multiplying the mapping factor by a unit vector that is directed in a direction of the highlight-color color and an amount of the color part of the color value to be mapped, and printing the color image mapped into the highlight-color color space on a recording medium using a printer.