Patent ID: 6999209
Filing Date: 2006-02-14
Classification: G06K,G06T,H04N

Abstract:
1. A method for electronically registering an input document, comprising: (a) generating an image data stream representing a captured image, the captured image including the input document, the image data stream being partition into a plurality of scan lines of image data; (b) detecting if the scan line of image data contains an edge of the input document and generating leading edge data and trailing edge data therefrom; (c) establishing, when a scan line of image data containing an edge of the input document is detected and no corner of the input document has been established, a first corner of the input document based on the generated leading edge data and trailing edge data corresponding to the scan line of image data containing an edge of the input document; (d) establishing a second corner of the input document from generated leading edge data, the establishing of the second corner of the input document including, (e) establishing a third corner of the input document from generated trailing edge data, the establishing of the third corner of the input document including, (f) establishing, when the generated trailing edge data is less than the second threshold value and the generated leading edge data is greater than the first threshold value, a fourth corner of the input document, after the first corner of the input document has been established and a scan line of image data containing an edge of the input document is detected, based upon current generated edge data.