Method for detection of skew angle and border of document images in a production scanning environment

摘要

A method for detection of a skew angle and a border of a document scanned by a production scanner comprise the steps of: (a) detecting a page start signal; (b) capturing an image line; (c) checking for an end of page signal; (d) if an end of page signal is detected go to step (h), if no end of page signal is detected go to step (e); (e) detecting image edge pixels; (f) performing a single pass connected contour pixel component analysis; (g) go to step (b); (h) collecting the connected contour pixel components; (i) selecting a largest component; and (j) analyzing the largest component to obtain the skew angle and border of the document.