Patent ID: 6341833
Filing Date: 2002-01-29
Classification: H04N

Abstract:
A print control apparatus for controlling a printing portion by sending control information for controlling the formation of dots of appropriate colors by said printing portion, by which a color image corresponding to image data is printed by combining black ink dots and ink dots in a plurality of primary colors capable in combination of producing achromatic color; said print control apparatus comprising:a color conversion table storage memory which stores a color conversion table matching the colors of the color image and the combination of each color tone value to form the above hues by using said primary color inks and black ink; an image data conversion unit which converts said image data to tone data of said primary color inks and black ink, by referring to said stored color conversion table; a dot formation unit which determines dot formation/non-formation by said primary color inks and black ink, based on said converted tone data; and a control information output unit which sends judgment results of said dot formation/non-formation as said control information for said printing portion; wherein said color conversion table is a table matching combinations of color tone data of the above primary color inks and said black ink in the case of color shades whose total density of formed dots of each color on said printing media exceeds the defined density when expressed only by using said primary color inks, which combinations of color tone data have been confirmed to be unlikely to cause bronzing during ink dot formation of each color based on each of the above color tone data.