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1 MICA - International Research Institute MICA 2 QGAR - Querying Graphics through Analysis and Recognition LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications 3 Signal Processing Lab Boise - Idaho

Abstract : A new parametric method for edge noise removal in graphical document images is presented using geometrical regularities of the graphics contours that exists in the images. Denoising is understood as a recovery problem and is done by employing a sparse representation framework with a basis pursuit denoising algorithm for denoising and curvelet frames for encoding directional information of the graphics contours. The optimal precision parameter used in this framework is shown to have linear relationship with the level of the noise. Experimental results show the superiority of the proposed method over existing ones in terms of image recovery and contour raggedness.

Mots-clés : Edge noise removal noise spread sparse representation basis pursuit denoising curvelet transform





Author: Thai V. Hoang - Elisa H. Barney Smith - Salvatore Tabbone -

Source: https://hal.archives-ouvertes.fr/



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