| 摘要 |
Control of an ink ejection frequency to compensate for recording medium unevenness in printing by inducing a predetermined unevenness pattern into a recording medium, adjusting an ink ejection frequency of a print head based on the induced unevenness pattern, and controlling ink ejection based on the adjusted frequency. A plurality of print heads may be employed that may correspond to different color inks and may be controlled by a same control signal or individually. Control may also be varied for bi-directional printing based on a printing direction. The adjustment of the ink ejection frequency may be providing a predetermined recording unevenness pattern having periodic oscillations, dividing each periodic oscillation into a predetermined number of regions, setting a number of ink droplets to be ejected within each region, determining a gate array interval for each region, providing at least one parameter corresponding to a printing operation, and determining an ink ejection trigger difference for each ink droplet to be ejected within each region.
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