Patent ID: 7872776

Claim:
A method of controlling hue variation associated with a first color IME (Image Marking Engine) and a second color IME having one or more substantially equivalent color separations, the method comprising: a) printing a control patch for each color separation associated with the first and second IMEs, the control patches associated with the actual rendering of respective target separation colors and based on a respective marking density correlated with the target separation colors; b) measuring color separation errors associated with the control patches relative to the respective target separation colors; c) determining a first color separation and a second color separation which define a respective maximum and minimum of an error range associated with color separation error differences between the first and second IMEs for each color separation; and d) decreasing the relative target color error associated with the first and second color separations by adjusting the marking density of the first and second color separations associated with the first and second IMEs by a fraction of the error range to decrease the color separation error range between the first and second IMEs.