| 摘要 |
<p>A method for processing a digitized continuous tone image for reproducing the image by a printing device, wherein the image includes a plurality of pixels, the method including (a) inputting a tone value of an input pixel of the image; (b) applying a plurality of levelsplit curves to the tone value, thus obtaining a plurality of level values, wherein each specific levelsplit curve out of the plurality of levelsplit curves corresponds to a level defined by (i) a combination of a dot density and a dot area, to be applied by the printing device to a receiving substrate for reproducing the image; or (ii) an overlap of a plurality of such combinations; and wherein each specific levelsplit curve defines, for the tone value of the input pixel, which fraction of output pixels of the image when reproduced by the printing device is to be filled by the level corresponding to the specific levelsplit curve when reproducing the tone value; (c) inputting the plurality of level values to an error diffuser for obtaining an output pixel value of an output pixel for reproducing the image; wherein a fraction of the output pixels that is to be filled by an overlap of levels depends on the level values and is independent of the error diffuser, the overlap of levels being an overlap of at least a first level and a second level, wherein the first level is a first combination of a first dot density and a first dot area and the second level is a second combination of a second dot density and a second dot area.</p> |
