| 摘要 |
According to the invention, video data which are incapable of sufficiently reducing toner consumption through thinning-down control inclusive of edge detection, is divided into unit elements to increase the apparent dot matrix number of each letter or character, and the unit elements thus obtained are reconstituted through an image smoothing process or a pseudo image density increasing process for thinning-down control again. When a pixel is divided into four divisions, for instance, substantially the same effect as of thinning-down control of a letter of apparently four times the size is obtainable. Dense thinning-down control is thus obtainable.
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