Automated entry system for printed documents
Pattern Recognition
Skew correction of document images using interline cross-correlation
CVGIP: Graphical Models and Image Processing
An improved document skew angle estimation technique
Pattern Recognition Letters
A fast approach to the detection and correction of skew documents
Pattern Recognition Letters
The Document Spectrum for Page Layout Analysis
IEEE Transactions on Pattern Analysis and Machine Intelligence
Projection profile based skew estimation algorithm for JBIG compressed images
ICDAR '97 Proceedings of the 4th International Conference on Document Analysis and Recognition
A Robust Skew Detection Algorithm for Grayscale Document Image
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
Skew Detection of Document Images by Focused Nearest-Neighbor Clustering
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
Generalized Projections: A Tool for Cursive Handwriting Normalization
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
A Data Reduction method for Efficient Document Skew Estimation Based on Hough Transformation
ICPR '96 Proceedings of the International Conference on Pattern Recognition (ICPR '96) Volume III-Volume 7276 - Volume 7276
A method of detecting the orientation of aligned components
Pattern Recognition Letters
Robust detection of skew in document images
IEEE Transactions on Image Processing
Skew detection using wavelet decomposition and projection profile analysis
Pattern Recognition Letters
A multi-plane approach for text segmentation of complex document images
Pattern Recognition
Handwritten document image segmentation into text lines and words
Pattern Recognition
e-PCP: A robust skew detection method for scanned document images
Pattern Recognition
Simulating inertial and centripetal forces for segmentation of overlapped handwritten digits
SMC'09 Proceedings of the 2009 IEEE international conference on Systems, Man and Cybernetics
A new technique for global and local skew correction in binary documents
ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
Fast and robust skew estimation of scanned documents through background area information
Pattern Recognition Letters
Skew estimation of document images using bagging
IEEE Transactions on Image Processing
Document skew estimation: an approach based on wavelets
Proceedings of the 2011 International Conference on Communication, Computing & Security
Document image analysis: issues, comparison of methods and remaining problems
Artificial Intelligence Review
CAIP'11 Proceedings of the 14th international conference on Computer analysis of images and patterns - Volume Part II
Parameter-free based two-stage method for binarizing degraded document images
Pattern Recognition
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We propose a fast and robust skew estimation method for scanned documents that estimates skew angles based on piecewise covering of objects, such as textlines, figures, forms, or tables. The method first divides a document image into a number of non-overlapping slabs in which each object is covered by parallelograms. It then estimates the skew angle based on these parallelograms or, equivalently, their complementary regions. Putting our method to a systematic test and comparing it with some alternatives, we find that it yields favorable results in terms of accuracy, sensitivity to non-textual objects, effectiveness in dealing with documents of unspecified reading order, and computational efficiency. Some work is also conducted to find an effective way to further shorten its computation time at the expense of an extremely small loss of accuracy.