| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a conventional technology that the processing speed is decreased because much processing cost is required. SOLUTION: A threshold of each halftone cell is set so that an image of an adjacent pixel group is drawn until each dot is connected in the same shape on the basis of movement of a start pixel within a halftone screened range. Since the movement of the start pixel causes no greater deviation because the moving range is determined, the movement of the start pixel can simply be executed by using a proper random number or the like. Since a pixel adjacent to the start point has only to be selected within the range as to also the pixels after the start point pixel, no greater difference from the shape is caused between dot shapes. After dots are grown in a way of pasting the moving range, all the cells may be similarly grown in matching with a state of a device or different threshold values may be set to the cells. COPYRIGHT: (C)2006,JPO&NCIPI
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