Abstract: Method for managing sets of digitally acquired images, the images of each set being acquired from the same original, comprising the steps of handling said sets of images as units and restricting use of predetermined operations to all images of one or more of said sets only. Further, a method for managing sets of digitally acquired images, the images of each set being acquired from the same original, each set comprising at least one front side image and at least one back side image, the method comprising the step of substantially simultaneously performing a first operation on the at least one front side image and a second operation on the at least one back side image, the second operation mirroring the first operation. Further, a method for separation and identification of digitally acquired documents, comprising the steps of: (i) calculating a signature for an incoming document on the basis its image, and (ii) correlating said signature with a database of signatures identifying document types.