Patent ID: 7689004
Filing Date: 2010-03-30
Classification: G06K

Abstract:
1. A method of evaluating the quality of an image of a document comprising: using a computer processing unit to perform the following: examining the image to determine if the image satisfies at least one parameter-based image metric; and examining the image to determine if the image satisfies a plurality of order-dependent image metrics; and wherein during examining of the image to determine if the image satisfies a plurality of order-dependent image metrics, said image is examined firstly to detect the existence of a frame surrounding the document, then to detect document skew, and then to detect at least one of (i) folded or torn document corners, (ii) folded or torn document edges, (iii) the existence of a carbon strip on the document and (iv) document piggyback; and wherein frame existence detecting comprises: determining a bounding region delineating the document in the image; and comparing the size of the frame surrounding said bounding region with a threshold to determine if said frame exceeds a frame size limit.