| 摘要 |
<p>PURPOSE:To obtain a high-quality image with smooth edges without increasing storage capacity by inputting and accumulating image data according to a recording density in a main scanning direction, and generating interpolation dot data based on the image data accumulated. CONSTITUTION:When a dot pitch of an image signal VDO sent from a printing controller 6 is 300 dpi, a multiplying circuit 5 outputs a clock signal VCLK' converted by frequency multiplication of an image clock signal VCLK inputted according to a conversion density selection signal S (in this example, the frequency is multiplied by 2). The image signal VDO is sequentially outputted to be written into shift registers 1, 2, 3 based on the clock signal VCLK', and interpolation is carried out by a comparing and discriminating circuit 4. The circuit 4 has a logical circuit 21, which is supplied with outputs from the registers 1, 2, 3 as six bits A, B, C, a, b, c, and outputs an image in question Q.</p> |
