| 摘要 |
Pixels are grouped into groups of pixels, comprising a plurality of pixels each, and representative tone values are determined for each of a plurality of regions into which the groups of pixels are split. Decisions are made as to whether or not to output dots to the individual pixels in the group of pixels based on the multilevel halftoning resultant values obtained through performing multilevel halftoning on the representative tone values, to thereby output an image. The multilevel halftoning resultant values can accelerate the creation and transfer of data, enabling rapid outputting of images. Moreover, based on tone values of the individual pixels within a group of pixels, a decision is made as to whether or not to split the group of pixels, where, for groups of pixels for which the decision is to not split the group of pixels, the representative tone value obtained for the group of pixels may be subjected to multilevel halftoning to determine whether or not to form dots, based on the multilevel halftoning resultant values. The present composition enables the high speed outputting of high quality images using simple processes.
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