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Chiddarwar, A. S.
- Enhancement of Palm-Leaf Manuscript and Color Document Images with Synthetic Background Generation
Authors
1 College of Engineering, Pune, IN
Source
Journal of Advances in Engineering Sciences, Vol 2, No 2 (2009), Pagination: 25-34Abstract
This paper presents a new color document image enhancement technique that is suitable for both palm-leaf manuscripts and color document images. The proposed technique consists of three steps: preprocessing using Wiener filter, contrast enhancement and background enhancement, binarization using new global thresholding technique and post processing for synthetic background generation.
In the preprocessing stage, we propose three sub-stages. The first sub stage is used to eliminate the noisy areas and smooth out the background. Second sub-stage enhances the contrast between background and text areas where as the third sub-stage takes care of non-uniform background. Binarization is performed by using new global thresholding technique. This technique helps in properly extracting useful text information from the low quality document and palm-leaf manuscript images. Finally, the post-processing stage resynthesizes the color background. The proposed technique has been tested on a set of palm-leaf manuscript and color document images having various deformities such as uneven background color, folds, character breaks and localized spots.