| 摘要 |
PURPOSE:To attain high speed processing by calculating two kinds of tentative binarization errors in advance in obtaining the binarization error and selecting a binarization error from the two kinds of the tentative binarization errors when the binarization level is confirmed so as to adopt one stage of circuit constitution for the arithmetic circuit. CONSTITUTION:In applying error operation respectively at two states of binarization level to obtain a binarization error and the level is selected in advance in deciding the binarization level. Then the arranged quantity of the binarization error is not concentrated on the picture element in a prescribed relative position of relation with respect to the noticed picture element by using an arrangement coefficient generating means 12 selecting one among plural arranging coefficient sets according to the generation of a random number set initially at an optional value or a value of a preceding line +(n) at each optional subscanning line in arranging the ratio of the binarization error of the noticed picture element with respect to the circumferential picture elements. Thus, the production of a texture pattern is suppressed in the processed output picture, high speed picture element processing is attained and the periodicity is given to a random number generator 39, then no texture is caused in the output picture even if the number of picture elements in the direction X is N times the periodicity.
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