IMAGE READING APPARATUS AND A SHADING COMPENSATION METHOD CAPABLE OF DISPLAYING AN ERROR MESSAGE WHEN A WHITE ZONE IS NO DETECTED ON A FIRST SURFACE AND A SECOND SURFACE

摘要

PURPOSE: An image reading apparatus and a shading compensation method are provided to implement the shading compensation by scanning a white zone detected from a first scanning part on a second scanning part.;CONSTITUTION: A first scanning unit(140) scans a first side of a fed paper which paper is provided. The first scanning part detects a white region. A direction converting unit(160) feed the fed paper to double-faced scan path again. A second scanning module(150) implements the scanning operation using the white zone of the fed paper again. A controller(170) implements the shading correction for the second scanning module using scan data for the white zone.;COPYRIGHT KIPO 2010