Patent ID: 7595920
Filing Date: 2009-09-29
Classification: H04N

Abstract:
1. A processing apparatus for color image information, comprising: an input device configured to input a combination of component values of reference colors that constitute a processing color; a conversion device configured to convert the inputted combination of component values of reference colors into a lightness value, saturation value, and hue value; a storage device configured to store a first correction factor dependent on a lightness value, wherein the first correction factor has a value of 1.0 for a lightness value converted from a specified color, and monotonically decreases toward 0.0 as the lightness value deviates from the lightness value converted from the specified color, and has a value greater than 0.0 when the lightness value is maximum; a storage device configured to store a second correction factor dependent on a saturation value, wherein the second correction factor has a value of 1.0 for a saturation value converted from the specified color, and monotonically decreases toward 0.0 as the saturation value deviates from the saturation value converted from the specified color; a storage device configured to store a third correction factor dependent on a hue value, wherein the third correction factor has a value of 1.0 for a hue value converted from the specified color, and monotonically decreases toward 0.0 as the hue value deviates from the hue value converted from the specified color; a modulation amount storage device configured to store a modulation amount of a lightness value, modulation amount of a saturation value, and modulation amount of a hue value; a lightness correction device configured to compute a corrected lightness value of the processing color by adding a multiplied value to the converted lightness value of the processing color prior to correction, wherein the multiplied value is a product of the modulation amount of a lightness value, the first correction factor corresponding to the converted lightness value of the processing color prior to correction, the second correction factor corresponding to the converted saturation value of the processing color prior to correction, and the third correction factor corresponding to the converted hue value of the processing color prior to correction; a saturation correction device configured to compute a corrected saturation value of the processing color by adding a multiplied value to the converted saturation value of the processing color prior to correction, wherein the multiplied value is a product of the modulation amount of a saturation value, the first correction factor corresponding to the converted lightness value of the processing color prior to correction, the second correction factor corresponding to the converted saturation value of the processing color prior to correction, and the third correction factor corresponding to the converted hue value of the processing color prior to correction; a hue correction device configured to compute a corrected hue value of the processing color by adding a multiplied value to the converted hue value of the processing color prior to correction, wherein the multiplied value is a product of the modulation amount of a hue value, the first correction factor corresponding to the converted lightness value of the processing color prior to correction, the second correction factor corresponding to the converted saturation value of the processing color prior to correction, and the third correction factor corresponding to the converted hue value of the processing color prior to correction; and an inverse conversion device configured to inversely convert the corrected lightness value, corrected saturation value, and corrected hue value into a combination of component values of reference colors constituting the corrected processing color.