Method for converting a full colour image to a monochrome image

A method for converting a full color image into a monochrome image, the full color image comprising pixels that have a color value and the monochrome image comprising pixels that have a grayscale value within a full range from dark to light, the method comprising the steps of:

• a) selecting a pixel of the full color image;
• b) decomposing the color value of the pixel into a luminance and a chrominance component;
• c) converting the luminance component into a first grayscale value within a first range that is substantially smaller than the full range from dark to light and substantially on the light side of the full range;
• d) converting the chrominance component into a second grayscale value within a second range that extends beyond the first range in the direction of the dark side of the full range;
• e) selecting the darkest value from the first and second grayscale values as the grayscale value of a corresponding pixel within the monochrome image, and f) repeating steps a) to e) until all pixels have been selected.