| 摘要 |
PURPOSE: To make it possible to amplify output signals and to improve accuracy by determining the correction values of respective pixels from the accumulated charge quantities and amplification degrees of the respective pixels and correcting shading. CONSTITUTION: The sensor output voltages of the respective pixels of the accumulated charge quantities of the respective pixels for a uniform-luminance surface and the amplification degrees A for the uniform-luminance surface are inputted to a control/ arithmetic processing section 2. The average value of the pixel section previously assigned as the section where the desired voltage level is obtd. among the sensor output voltages of the respective pixels of the amplification degrees A is determined in this control/arithmetic processing section 2. The differences between this value and the sensor output voltages of the respective pixels of the amplification degrees A are taken and are further divided by the amplification degrees A and the accumulated charge quantities of the respective pixels. These values indicate the differences between the voltage levels of the respective pixels for the desired sensor output voltage levels per the unit amplification degree and unit accumulated charge quantity. The values obtd. in such a manner are stored as the shading correction values of each of the respective pixels into a memory 3 via an address controller 7. |
