Patent ID: 6989917
Filing Date: 2006-01-24
Classification: H04N

Abstract:
1. An image reading apparatus which can operate in a plurality of image processing modes, comprising: a photoelectric converter adapted to read an object image and outputting an electrical signal; a reference member used to correct image read nonuniformity of said photoelectric converter; an illumination light source adapted to illuminate an object and said reference member with light; a timer adapted to measure an elapsed time since a previous OFF timing of said illumination light source, and a time since said illumination light source is turned on; an instruction unit adapted to issue a read instruction of the object; and a controller, adapted to set a wait time in correspondence with the elapsed time measured by said timer and also in accordance with a currently set image processing mode of the plurality of image processing modes, that, when said instruction unit issues the read instruction of the object turns on said illumination light source again, and controls said photoelectric converter to begin to read said reference member after a lapse of the wait time since said illumination light source is turned on.