| 摘要 |
PURPOSE:To generate high quality and high gradation images while the resolution of the images remains high. CONSTITUTION:An environmental humidity is detected by a humidity sensor 526 and an environmental temperature is detected by a temperature sensor 524. Also, the fluctuation of the rotation of a motor 511 is detected by a motor control part 513 and is defined as data for indicating the irregularity of the images to be formed. A system controller 509 decides a threshold value SWDAT based on the data. SWDAT is the threshold value of the changeover of an image forming density, the density of the images detected by a density VR 522 is compared with SWDAT, the picture element density of the images is decided corresponding to the result and the high resolution and the images without the irregularity are made consistent. |
