23 March 1994 Text enhancement method based on soft morphological filters
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Abstract
Soft morphological filters are robustly behaving extensions of standard flat morphological filters which include, as an extreme case, the weighted median filter. Soft morphological filters can take into account the geometrical shape of the processed objects and, at the same time, they are robust to additive noise and small variations in the shapes of the objects to be filtered. For suitable parameters they also have a good ability for preserving details. Thus, they provide a robust method for text enhancement. In this paper, an enhancement method based on soft morphological filters is demonstrated.
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Lasse Koskinen, Heikki Huttunen, and Jaakko T. Astola "Text enhancement method based on soft morphological filters", Proc. SPIE 2181, Document Recognition, (23 March 1994); doi: 10.1117/12.171111; https://doi.org/10.1117/12.171111
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