| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably output an image by stably performing an image exposure intensity modulation even when a magnetic developer having a sphericity of 0.95 or higher is used. <P>SOLUTION: The image former has three or more values as an image exposure intensity to form an image, an area temporarily holding image data P, obtains a weighted total value A of the perimeter of each picture element Pnm in the image data P, converts the weighted total value A by a conversion table R and determines an image exposure intensity C based on the value B converted. The conversion table R performs a conversion to reduce the image exposure intensity only when the weighted total value A exceeds a prescribed threshold value. The developer 31 is magnetic toner particles containing a copolymer having at least a binding resin and has a sphericity of 0.95 or higher. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
