Patent ID: 11909938
Assignee: SEIKO EPSON CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 0:
1. A printing method comprising:
a color space conversion step of converting a color space of image data from a device-dependent color space to a uniform color space;
a gradation determination step of determining, using a distribution of a pixel group and a color change included in a predetermined range from a pixel of interest in the converted uniform color space, whether the pixel group forms a gradation; and
a gradation region ink amount calculation step of calculating an ink amount of the pixel group determined to form the gradation, wherein
the gradation region ink amount calculation step includes
an array information acquisition step of acquiring whether pixel values constituting the pixel group determined to form the gradation are arranged linearly, in a planar manner, or in a polyhedron manner in the uniform color space,
a grating color value calculation step of determining a grating color value which is a color value of a grating point in the array,
a grating ink amount calculation step of calculating, using the determined grating color value, a grating ink amount which is an ink amount of the grating point in the array, and
an interpolation calculation step of calculating an ink amount of the pixel group determined to form the gradation by interpolation using the calculated grating ink amount.