The paper size detection device and the transparent

摘要

PPROBLEM TO BE SOLVED: To provide a sheet size detector for detecting the size of a sheet mounted on a transparent sheet mounting table by reading the sheet optically and distinguishing the sheet from the background in which the sheet size can be detected accurately, and to provide its control program. PSOLUTION: In the sheet size detector for detecting the size of a sheet mounted on a transparent sheet mounting table by reading the sheet optically and distinguishing the sheet from the background, the threshold value for distinguishing the sheet from the background is not a predetermined fixed value but variable according to the conditions. PCOPYRIGHT: (C)2006,JPO&NCIPI