| 摘要 |
PURPOSE:To suppress the occurrence of a texture in the course of an error diffusing method, by changing the picture element position corresponding to a set of distributing factors to previously fixed plural unprocessed picture elements in the vicinity of a noticed picture element. CONSTITUTION:A distributing factor producing means 12 is provided with four registers 14-17 and load each of distributing factor sets KA0, KB0, KC0, and KD0 as initial values before processing picture elements. Data of the registers 14-17 are simultaneously moved to the next registers 17, 14, 15, and 16 synchronously to the synchronizing signal corresponding to the X-and Y-direction picture element processing periods from a synchronizing signal input terminal 13. These output data are outputted to an error distributing and updating means 11 as distributing factors KA-KD. When such operations are performed, the values of the factors KA, KB, KC, and KD change synchronously to the synchronizing signals in the order of KA0, KB0, KC0, and KD0, KB0, KC0, KD0, and KA0, KC0, KD0, KA0, and KB0, and KD0, KA0, KB0, and KC0, respectively.
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