Method and system for assigning color values to primary colors and secondary colors for color rendering in an inkjet printer

摘要

A method enables primary color values for pixel to be processed before the pixel is rendered. The method includes allocating non-black primary colors as being under black, secondary colors, or tertiary colors.

主权项

1. A method for converting primary color values for a pixel to primary and secondary color values for the pixel comprising:
receiving from a memory with a print engine operatively connected to the memory a color value for each primary color to be printed for a plurality of pixels; determining from the color values for the primary colors for each pixel whether a combined color is to be printed for each pixel by comparing a total amount of primary color for each pixel to a threshold and identifying an amount of quaternary color and an amount of tertiary color for each pixel that has the total amount of primary color being equal to or greater than the threshold; identifying with the print engine an amount of non-black color under black color for the pixels having a total amount of primary color being less than the threshold, the identification being made with reference to the color values received from the memory for each primary color for the pixels having the total amount of primary color being less than the threshold; identifying with the print engine a total amount of non-black color for secondary colors associated with the pixels having the total amount of primary color being less than the threshold, the identification of the total amount of non-black color for secondary colors being made with reference to the amount of non-black color under black color and the color values received for each primary color for the pixels having the total amount of primary color being less than the threshold; and assigning with the print engine a color to be printed for the pixels having the total amount of primary color being less than the threshold with reference to the total amount of non-black color for secondary colors associated with the pixels having the total amount of primary color being less than the threshold to enable generation of a control signal to operate an inkjet ejector to print the pixels having the total amount of primary color being less than the threshold with the assigned color.