Patent ID: 7463390

Claim:
An image reading apparatus for reading an original document, including a transmissive original document and a reflective original document, the image reading apparatus comprising: an original document placement position having a first side and an opposing second side; a first light source arranged on the first side of the original document placement position and operable to illuminate a first light on the transmissive original document; a second light source arranged on the opposing second side of the original document placement position and operable to illuminate a second light on one of the reflective original document and the transmissive original document; an image sensor generating electronic image data, including non-image information based on the first light transmitted through the transmissive original document, and other information based on the second light reflected from the one of the reflective original document and the transmissive original document; a detector unit configured to detect the non-image information of the electronic image data; and a correction unit correcting the electronic image data based on the non-image information detected by the detector unit.