Patent ID: 8630491
Filing Date: 2014-01-14
Classification: G06K,H04N

Abstract:
1. A method of operating an image reader comprising the steps of: providing a location of a stand relative to an area to be imaged; searching a digital image for nominally straight edges, the searching comprising searching an image in high resolution and low resolution; characterizing the nominally straight edges in terms of one of the following: length, direction, or length and direction vectors; determining a predominant orientation of the nominally straight edges; establishing a first group of edges as a function of their proximity to the center of the image; establishing a second group of edges as a function of their proximity to other remaining edge positions; transmuting a rectangle bounding the first group of edges and the second group of edges into a rectified image, determining angular distortion based on the location of the stand relative to the area and applying a correction.