Printing methods

The printing method addresses the challenge of insufficient color reproduction in gradient areas by converting image data to a uniform color space, determining gradients, and calculating ink amounts through grid values and interpolation, resulting in improved image quality and reduced computational load.

JP7877817B2Active Publication Date: 2026-06-23SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2022-05-17
Publication Date
2026-06-23

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Abstract

To provide a printing method that can sufficiently reproduce a color value of a part with gradation.SOLUTION: A printing method includes: a color space conversion step; a gradation determination step of determining if a pixel group forms gradation; and a gradation region ink amount calculation step of calculating an amount of ink in the pixel group determined to form gradation. The gradation region ink amount calculation step includes: an arrangement information acquisition step of acquiring whether pixel values are in linear, plane, or polyhedral arrangement in a uniform color space; a lattice color value calculation step of determining a lattice color value that is a color value of a lattice point in the arrangement; a lattice ink amount calculation step of calculating a lattice ink amount that is an amount of ink in the lattice point in the arrangement by using the determined lattice color value; and an interpolation arithmetic step of calculating an amount of ink in the pixel group determined to form gradation through interpolation using the calculated lattice ink amount.SELECTED DRAWING: Figure 1
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