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As we all known, the Back-to-Front noises may affect the feature extraction and classification of text when using ORC to identify. In this paper, we take advantage of dynamic threshold method to process the vision document image of Back-to-Front noise with unimodal or bimodal histogram characteristic. Experimental results show that this algorithm has a better effective.
In recent years, digital maps are used more and more widely, it plays a significant role in the national economy and defense construction, illegal duplication and distribution or forgery of the maps is also easy. Digital watermarking algorithms for vector data are an efficient method to counter such abuses of the maps. Considering the characteristic of vector geo-spatial data for digital watermarking,...
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