A method of swipe-scanning a graphic image pre-printed on a surface. The method comprises the steps of: (i) operatively positioning a swipe-scanner relative to the surface and swiping the scanner across the surface; (ii) capturing, during the swipe, successive images of portions of the graphic image; (iii) printing, during the swipe, successive parts of a position-coding pattern onto the graphic image, the position-coding pattern identifying a plurality of absolute positions and an impression identity for the graphic image; (iv) sensing, during the swipe, positions of the scanner; (v) using the sensed positions to control, during the swipe, printing of the position-coding pattern; (vi) using the sensed positions to assemble the captured portions of the graphic image into a scanned graphic image; and (vii) generating association data indicating an association between the impression identity, the plurality of absolute positions and the scanned graphic image.