A binarization method is presented to counter the stroke connectivity problems of characters arising from mid-level-quality binary image scanning systems. In the output of a binary image scanning system, separate strokes may look connected if the point size is small and the character strokes are complex while strokes may lose connectivity if they are generated at low intensity. Also, erroneous recognition may result if a blemished document surface distorts the image. To counter these problems and to further enhance the quality of character recognition, the authors have developed an integrated binarization scheme, exploiting synergistic use of an adaptive thresholding technique and variable histogram equalization. This algorithm is composed of two components. The first removes background noise via gray level histogram equalization while the second enhances the gray level of characters over and above the surrounding background via an edge image composition technique.
Improved binarization algorithm for document image by histogram and edge detection
Proceedings of 3rd International Conference on Document Analysis and Recognition ; 2 ; 636-639 vol.2
01.01.1995
369997 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Improved Binarization Algorithm for Document Image by Histogram and Edge Detection
British Library Conference Proceedings | 1995
|OCR Oriented Binarization Method of Document Image
IEEE | 2008
|A system for document binarization
IEEE | 2003
|A System for Document Binarization
British Library Conference Proceedings | 2003
|Preliminary evaluation of histogram-based binarization algorithms [2422-23]
British Library Conference Proceedings | 1995
|