| 摘要 |
PURPOSE:To eliminate the necessity to which the control unit of an address for referring to a dither table correspondingly to the requested number of gradations to be added in the case of executing dither modulation. CONSTITUTION:When it is desired to selectively use the dither table of 3X3 and the dither table of 4X4, a storage space 100 of 12X12 is prepared as a storage space. The dither table of 3X3 is uniformly stuck on the storage space 100 without space as a unit dither table 102. When using the dither table of 4X4, the dither table of 4X4 is uniformly stuck on this storage space 100 without space as a unit dither table 104. Since the size of the storage space 100 is set to the least common multiple among sizes of various dither tables to be required, only one address generation control unit corresponding to the storage space 100 of 12X12 is required for reading a threshold value from the dither table. |
