Method for rendering color images

A method of rendering an image on a plurality of pixels of a display, wherein each of the plurality of pixels can display any one of a complete set of display primary colors, the method comprising:

• receiving input data representing colors to be displayed at each of the plurality of pixels;
• combining the input data with error data to create modified input data;
• determining in a color space a simplex enclosing the modified input data, wherein the vertices of the simplex comprise a subset of the display primary colors that is smaller than the complete set of display primary colors, hereafter a simplex primary color;
• setting output data for a first pixel corresponding to one of the simplex primary colors;
• and
• calculating a difference between the modified input data for the first pixel and the output data for the first pixel, thereby generating new error data for the first pixel;
• combining input data for a second pixel with the new error data for the first pixel to create new modified input data for the second pixel;
• determining in the color space a new simplex enclosing the modified input data and the new modified input data for the second pixel, wherein the vertices of the new simplex comprise a subset of the display primary colors that is smaller than the complete set of display primary colors, hereafter a new simplex primary color;
• and
• setting output data for the second pixel corresponding to one of the new simplex primary colors.