Patent ID: 7847978
Filing Date: 2010-12-07
Classification: H04N

Abstract:
1. An image reading apparatus comprising: an imaging unit comprised of a plurality of chips linearly mounted on a substrate, each chip including a light receiving portion that receives light from an object and that outputs a plurality of first signals, and a light-shielded portion, in which light from the object is shielded, that outputs a plurality of second signals; a light source arranged to illuminate the object; a sorting unit constructed to sort the plurality of first signals and the plurality of second signals from the imaging unit on an each chip basis; a signal correction unit constructed to correct, on the each chip basis, one of the plurality of first signals output from the imaging unit when the light source illuminates the object, in accordance with one of the plurality of second signals output from the imaging unit when the light source does not illuminate the object, and in accordance with one of the plurality of second signals output from the imaging unit when the light source illuminates the object, wherein the signal correction unit corrects the plurality of first signals sorted by the sorting unit in accordance with the plurality of second signals sorted by the sorting unit.