| 摘要 |
PURPOSE:To obtain enlarged or reduced images having high quality without the generating of moires by changing the number of processing bits on the basis of a picture element size and an enlargement or reduction rate which respect to spurious half tone data. CONSTITUTION:The reduction or enlargement rate is set to a register 19, and an initial value '0' is set to a register 20. In case of reduction in the main scanning direction of the spurious half tone data, a sequencer 18 generates m-number of clocks at every respective one clock of shift clock signals 15 and 16 when a carry signal 24 is generated. When the signal 24 is not generated, the sequencer 18 generates m-number of clocks of only the signal 15. In case of enlargement of the spurious half tone data, the sequencer 18 outputs m- number of clocks of each of clock signals 15 and 16 to transfer and copy m-bit contents of the resister to a register 13 when the signal 24 is not generated. When the signal 24 is generated, the m-bit contents of the register are shifted to the register 13, and the same contents are inputted to the register 13 again.
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