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Open AccessArticle

Voting-Based Document Image Skew Detection

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Computer Science and Engineering Department, Faculty of Automatic Control and Computers, Politehnica University of Bucharest, Splaiul Independence 313, 060042 Bucharest, Romania
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Automatic Control and Systems Engineering Department, Faculty of Automatic Control and Computers, Politehnica University of Bucharest, Splaiul Independence 313, 060042 Bucharest, Romania
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Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(7), 2236; https://doi.org/10.3390/app10072236
Received: 20 February 2020 / Revised: 16 March 2020 / Accepted: 24 March 2020 / Published: 25 March 2020
(This article belongs to the Section Computing and Artificial Intelligence)
Optical Character Recognition (OCR) is an indispensable tool for technology users nowadays, as our natural language is presented through text. We live under the need of having information at hand in every circumstance and, at the same time, having machines understand visual content and thus enable the user to be able to search through large quantities of text. To detect textual information and page layout in an image page, the latter must be properly oriented. This is the problem of the so-called document deskew, i.e., finding the skew angle and rotating by its opposite. This paper presents an original approach which combines various algorithms that solve the skew detection problem, with the purpose of always having at least one to compensate for the others’ shortcomings, so that any type of input document can be processed with good precision and solid confidence in the output result. The tests performed proved that the proposed solution is very robust and accurate, thus being suitable for large scale digitization projects. View Full-Text
Keywords: deskew; skew angle detection; automatic document orientation; computer vision; OCR preprocessing; image document analysis deskew; skew angle detection; automatic document orientation; computer vision; OCR preprocessing; image document analysis
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MDPI and ACS Style

Boiangiu, C.-A.; Dinu, O.-A.; Popescu, C.; Constantin, N.; Petrescu, C. Voting-Based Document Image Skew Detection. Appl. Sci. 2020, 10, 2236.

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