Patent ID: 6958834

Claim:
An image reading device comprising: light irradiating means for scanning a surface of a document on a document table while irradiating the surface with light; color photoelectric conversion means for reading light reflected from the surface of the document, as reflected light, and photoelectric converting the reflected light into plural color signals; white reference means provided at the side of the document table for being read and photoelectric converted by the color photoelectric conversion means; storage means for storing signal data comprising plural color signals that are photoelectric converted by the color photoelectric conversion means and white document data comprising plural color signals that are read and photoelectric converted by the color photoelectric conversion means from a white document in color equivalent to the white reference means placed on the document table; and correction means for executing a color balance correction and a stray light correction simultaneously with an execution of a shading correction based on the signal data and the white document data stored in the storage means, wherein the correction means executes the stray light correction by correcting a difference between the signal data and the white document data which are stored in the storage means.