Image processing apparatus, image forming apparatus, and computer-readable recording medium

An image processing apparatus for correcting density nonuniformity comprising:

• a sensitivity calculating unit that calculates, using reading data obtained by reading a reference image, sensitivities of each of plural types of the color signals for each of different density values of a color material which is expressed by the plural types of color signals, the reference image being recorded by plural recording elements that use color material to record and having plural density patterns for each of the different density values of the color material;
• a color material density value calculating unit that calculates density values of the color material with respect to at least one of the plural recording elements for each of the different density values of the color material on the basis of the reading data of each of the plural types of color signals for each of the different density values of the color material with respect to the at least one of the plural recording elements, and on the basis of the sensitivities calculated by the sensitivity calculating unit;
• and
• a correction amount calculating unit that calculates, for each of the different density values, correction amounts of the density values of the color material for the at least one of the plural recording elements using the density values of the color material calculated by the color material density value calculating unit.

A non-transitory computer-readable medium storing a program causing a computer to execute a process for density value correction, the process comprising:

• calculating sensitivities of each of the color signals for each of the different density values of the color material, on the basis of a reading data obtained by reading a reference image, the reference image being recorded by plural recording elements that use color material to record, having plural density patterns for each of predetermined different density values of color material, and expressed by plural types of color signals;
• calculating density values of the color material with respect to each recording element for each of the different density values of the color material on the basis of each of the color signals for each of the different density values of the color material with respect to each recording element of the reading data and on the basis of the sensitivities of each of the color signals that have been calculated for each of the different density values of the color material;
• and
• calculating, for each of the different density values, correction amounts of the density values of the color material with respect to each recording element on the basis of the density values of the color material, with respect to each recording element, that have been calculated for each of the different density values of the color material.

A non-transitory computer-readable medium storing a program causing a computer to execute a process for density value correction, the process comprising:

• calculating sensitivities of each of the color signals for each of the different density values of the color material, on the basis of a reading data obtained by reading a reference image, the reference image being recorded by plural recording elements that use color material to record, having plural density patterns for each of predetermined different density values of color material, and expressed by plural types of color signals;
• calculating, on the basis of the reading data, and for each of the different density values of the color material, correction amounts with respect to each recording element in regard to each of the color signals;
• and
• calculating, for each of the different density values of the color material, correction amounts of the density values of the color material on the basis of the correction amounts of the color signals for each of the different density values of the color material with respect to the recording elements that have been calculated in regard to each of the color signals and on the basis of the sensitivities of each of the color signals that have been calculated for each of the different density values of the color material in regard to each recording element.