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Context-based multiscale classification of document images using wavelet coefficient distributions

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2 Author(s)
Jia Li ; Xerox Palo Alto Res. Center, CA, USA ; Gray, R.M.

In this paper, an algorithm is developed for segmenting document images into four classes: background, photograph, text, and graph. Features used for classification are based on the distribution patterns of wavelet coefficients in high frequency bands. Two important attributes of the algorithm are its multiscale nature-it classifies an image at different resolutions adaptively, enabling accurate classification at class boundaries as well as fast classification overall-and its use of accumulated context information for improving classification accuracy

Published in:

Image Processing, IEEE Transactions on  (Volume:9 ,  Issue: 9 )

Date of Publication:

Sep 2000

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