Image processing apparatus, image processing method, and non-transitory computer-readable storage medium

An image processing method performed by an image processing apparatus, comprising:

• generating gradation data corresponding to an achromatic color generated by combining two or more colors among a plurality of colors, for an excess amount of a total gradation value exceeding a predetermined value, the total gradation value being a sum of gradation values of the plurality of colors used for recording a pixel of interest, and generating gradation data corresponding to the plurality of colors, based on the generated gradation data corresponding to the achromatic color;
• and
• quantizing the gradation data generated, and generating data to control recording of dots corresponding to the pixel of interest, wherein
• the predetermined value is a gradation value indicating whether or not to record the dots in an overlapping manner, in case that the dots corresponding to the total gradation value are recorded, and
• gradation data is generated in ascending order of density of colors when being superimposed.

A non-transitory computer-readable storage medium storing a computer program that causes a computer to perform an image processing method comprising:

• generating gradation data corresponding to an achromatic color generated by combining two or more colors among a plurality of colors, for an excess amount of a total gradation value exceeding a predetermined value, the total gradation value being a sum of gradation values of the plurality of colors used for recording a pixel of interest, and generate gradation data corresponding to the plurality of colors, based on the generated gradation data corresponding to the achromatic color;
• and
• quantizing the gradation data generated, and generating data to control recording of dots corresponding to the pixel of interest, wherein
• the predetermined value is a gradation value indicating whether or not to record the dots in an overlapping manner, in case that the dots corresponding to the total gradation value are recorded, and
• gradation data is generated in ascending order of density of colors when being superimposed.