An introduction to digital image processing
An introduction to digital image processing
Extraction and recognition of artificial text in multimedia documents
Pattern Analysis & Applications
Binarization of Badly Illuminated Document Images through Shading Estimation and Compensation
ICDAR '07 Proceedings of the Ninth International Conference on Document Analysis and Recognition - Volume 01
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This paper presents the illumination compensation technique for document images using local-global block analysis. Imbalance illumination will affect the performance of classification and segmentation process because the darker regions conceal the information of the image. This method will split the image into non-overlapped blocks, and utilize the information within the local and global area of the image. The output images were binarized with simple global thresholding technique and the result shows that the output image is comparable in quality with the existed method. A comparative result will be presented with other document binarization methods.