| 摘要 |
PURPOSE:To obtain copies with high quality at all times, by forminga signal which eliminates information expressing the change in the content of information extremely, out of picture element information from a scanning type line image sensor. CONSTITUTION:After video information sequentially outputted from a scanning type line image sensor IS is in A-D conversion, it is applied to a CPU. The CPU makes a specified operation according to the predetermined program and sequentially compares the picture element information from the sensor IS. A signal eliminating the picture element information expressing the change in the content of information extremely, is formed and this signal is given to a development bias voltage generator 11 and this generated voltage is applied to a development section 10. thus, since the information due to a minute section expressing an extreme reflectance index on an original can be removed by setting the development bias voltage like this, copying with high quality can always be achieved. |
