| 摘要 |
The image processing apparatus or the printing device of the present invention forms units by grouping adjacent multiple-pixels and converts the image data to the dot data representing dot on/off state for each of pixels. The apparatus stores the dot data in a condition enabling identification of the dot on/off state for at least one of pixels within the previously converted units. When the apparatus converts the image data to the dot data by a unit, The apparatus serially specifies a interested pixel, within a unit to be converted to the dot data, for determination of dot on/off state. Then the apparatus determines the dot on/off state for the interested pixel, according to a characteristic that controls the proportion of a number of dots formed at the predetermined location of the unit against a number of all dots into a predetermined range. It prevents cyclical patterns from becoming visible and degrading image quality.
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