IMAGE READER ACQUIRING BLACK DATA AND WHITE DATA FOR SHADING CORRECTION WHEN COVER IS IN OPEN STATE

摘要

In an image reader, a controller acquires a set of first black data for each pixel in a line by reading one line worth of image via a light receiver with a light source being turned off when a detector detects that a cover is in an open state. Subsequently, the controller acquires a set of white data for the each pixel in the line by reading a white reference member via the light receiver with the light source emitting light when the detector detects that the cover is in the open state. The controller calculates a set of correction data for the each pixel in the line by subtracting the set of first black data of the each pixel from the set of first white data of the each pixel. The set of correction data is used in a shading correction.