| 摘要 |
PURPOSE:To always obtain a picture with high picture quality by writing a prescribed test pattern on a photosensitive body, measuring the reproduction state of a test pattern developed by a toner, feeding back the measured value to an anti-aliasing processing section, in which the anti-aliasing processing is executed. CONSTITUTION:A test pattern written on a photosensitive drum is toner- developed by a multi-value color laser printer 500 and the reproduction state of the test pattern subject to toner development is measured through a toner adhesion concentration measurement equipment (toner adhesion state measuring means). Then the measured value of the toner adhesion concentration measurement equipment is fed back to an anti-aliasing processing section (PDL controller 200), and the S/N of the test pattern re-development of the test pattern subject to toner development is calculated from the measured value and the gradation after the anti-aliasing processing is corrected so that the gradation with deteriorated S/N is not in use. |
