1. A method of automatically detecting a page size for a digital scanning operation, the method comprising: establishing vertical and horizontal limits of an image area containing image content features of a pre-scanned image by analyzing edge and gray level attributes of the pre-scanned image, wherein establishing of the image area limits comprises: apportioning the pre-scanned image into a plurality of overlapping localized areas, detecting edge and gray level attributes for each overlapping localized area, and qualifying the detected edge and/or gray level attributes to generate the image area; detecting vertical page edge information of the image area; and detecting horizontal page edge information of the image area, wherein the vertical and horizontal page edge information define the page size for the pre-scanned image.