US Patent 7471423 Image processing system and image processing method

An image processing system comprising: an image acquisition unit for acquiring a scanned image; a non-voltage storage medium that stores correction information corresponding to a known object having a three-dimensional shape defined by the standard; when an object of the scanned image is the known object, a correction unit that corrects a shadow area of the scanned image corresponding to a shadow resulting from thickness of the known object, on the basis of the correction information.