An introduction to digital image processing
An introduction to digital image processing
Pattern Recognition
Automatic thresholding of gray-level pictures using two-dimensional entropy
Computer Vision, Graphics, and Image Processing
Extraction of binary character/graphics images from grayscale document images
CVGIP: Graphical Models and Image Processing
An analysis of histogram-based thresholding algorithms
CVGIP: Graphical Models and Image Processing
Binarization and multithresholding of document images using connectivity
CVGIP: Graphical Models and Image Processing
Improvement of “integrated function algorithm” for binarization of document images
Pattern Recognition Letters
Integral Ratio: A New Class of Global Thresholding Techniques for Handwriting Images
IEEE Transactions on Pattern Analysis and Machine Intelligence
Goal-Directed Evaluation of Binarization Methods
IEEE Transactions on Pattern Analysis and Machine Intelligence
Adaptive Document Binarization
ICDAR '97 Proceedings of the 4th International Conference on Document Analysis and Recognition
A hierarchical approach in multilevel thresholding based on maximum entropy and Bayes' formula
VIP '01 Proceedings of the Pan-Sydney area workshop on Visual information processing - Volume 11
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
Text Extraction from Name Cards with Complex Design
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
A comparative study of local thresholding methods for document image binarization
Machine Graphics & Vision International Journal
Card Images Binarization Based on Dual-Thresholding Identification
ICIC '08 Proceedings of the 4th international conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications - with Aspects of Artificial Intelligence
A binarization algorithm for historical manuscripts
ICCOM'08 Proceedings of the 12th WSEAS international conference on Communications
Segmentation of Chinese Postal Envelope Images for Address Block Location
ISVC '09 Proceedings of the 5th International Symposium on Advances in Visual Computing: Part II
A new video text extraction approach
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
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A multi-stage approach is presented for thresholdingdocument images, along with its application. Theproposed method is based on two stages. Globalthresholding is used in first stage to give a preliminaryresult. A second stage then refines the threshold valuebased on local spatial characteristics of the regionsformed in the first stage. It automatically customizes thethresholding of regions that have specific and consistentcharacteristics but are different to other regions in theimage. This technique works well for both simple images,in which the background and foreground are distinct andseparable, and complex images containing multipleregions with different shading/textures. A typicalapplication is postal envelope analysis. The results ofevaluation show significant improvement compared toseveral other global and local thresholding techniques.