Skew Detection Techniques for Printed Documents of Various Scripts: A Survey
- Country : India
- Subject : Computer Engineering
Various problems may get introduced during document scanning, which may decrease the overall accuracy of optical character recognition system. These problems are skewness, noise, unequal intensity etc. Skewness is frequently occurring phenomenon due to non-alignment of image border with scanner. Various techniques have been developed to detect and correct the skew in different type of documents. The commonly used techniques are based on identification of baseline, projection profile, Hough transformation, nearest neighbor, morphological, cross correlation. Each technique has its own pros and cons. In this paper, literature survey of skew detection methods for printed document of various scripts has been carried out.