| 摘要 |
A dither matrix generator includes: main-cluster generating means for generating at least one main-cluster in a matrix, the matrix including a plurality of cells, the main cluster area including a predetermined number of cells; sparest searching means for searching a sparest area in the matrix, the sparest area being the area other than the area of main-cluster; sub-cluster generating means for generating at least one sub-cluster area, the sub-cluster area including a smaller number of cells than that of the main-cluster; dither value allocating means for allocating dither values to the plurality of cells of the matrix, the cells in the main-clusters having smaller dither values than those in the sub-cluster areas, the cells in the sub-cluster areas having smaller dither values than those in the areas other than the main-cluster and the sub-cluster areas.
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