| 摘要 |
When binary image data is outputted from a FIFO buffer, a first black pixel counting circuit counts black pixels in a 3x3 matrix having a target pixel at its center to produce a count value BK2. Similarly, a second black pixel counting circuit counts black pixels in a 17x9 matrix to produce a count value BK1. Based on the count values BK1 and BK2, a value indicating the dot diameter is outputted from the output value table while a look-up table and the output value table are sequentially referred to. Setting is so made that the dot diameter becomes smaller as the count values BK1 and BK2 decrease.
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