An image scanning device and a shading compensation method include reading out a second region of a reference white sheet spaced by a predetermined distance from a white roller prior to reading out a to-be-scanned document to generate a reference shading compensation value; comparing the generated reference...http://www.google.fr/patents/US7352496?utm_source=gb-gplus-shareBrevet US7352496 - Image scanning device and shading compensation method thereof
Image scanning device and shading compensation method thereof
