1. A method for processing a captured image that comprises an imaged document; said method comprising: detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image; selecting one or more lines from said graphical information corresponding to edges of said imaged document; calculating corners of said imaged document based on intersection of one or more lines corresponding to edges of said imaged document; isolating said imaged document from background of said captured image based on one or more lines corresponding to edges of said imaged document; setting a curved coordinate net on said imaged document; stretching said curved coordinate net to a rectangular coordinate net; adjusting said rectangular coordinate net to generate an adjusted rectangular coordinate net for use in reducing image distortion in the captured image.