A construction is achieved at low cost which reduces the loss of gradation in a dark portion of an image that has been subjected to gamma correction in accordance with characteristics of a display. In an image reading apparatus, to make it possible to more finely reproduce the gradation in the dark portion,...http://www.google.se/patents/US7978384?utm_source=gb-gplus-sharePatent US7978384 - Image processing system, image processing apparatus, image processing method, and storage medium thereof
