1. An image processing method for mitigating the effects of show-through in multiple page scanning operations, comprising: deriving a scanned first side image P from a first side image A of a duplexed document and a scanned second side image Q from a second side image B of said duplexed document, at least said first side image P including a component thereof attributable to show-through from said second side of said document, and storing images P and Q; deriving a scanned first side image R from a first side image C of a subsequent duplexed document and a scanned second side image S from a second side image D of said subsequent duplexed document, at least the first side image R including a component thereof attributable to show-through from said second side of said subsequent document, and storing images R and S; from second side image Q, first side image R, and second side image S, generating a comprehensive representation thereof corresponding to the show-through contribution of Q, R and S to first side image P; processing image P to remove show-through as a function of the representation Q, R and S, thereby deriving correct image A.