Fast algorithm for document skew detection method using run-length smoothing, Hough transform, mathematical morphology and wavelet
Fusheng Guo, Xiangning Chen, Jiangbo Li · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2007
Document skew is often introduced into the scanned or printed document, so the document skew detection and correction play an important role in the document image processing. This paper gives a whole review of existent algorithms and describes their respective shortcomings. We propose a novel algorithm combined with run-length smoothing, Hough transform, Mathematical Morphology and Wavelet, as to improve its precision and speed. The algorithm this paper gives is feasible and effective, and it can be run automatically. It can be faster and more accurate than other methods and can be applied in document words identify.