Handling noise in textual image resolution enhancement using online and offline learned dictionaries

@article{Walha2017HandlingNI,
  title={Handling noise in textual image resolution enhancement using online and offline learned dictionaries},
  author={Rim Walha and Fadoua Drira and Frank Lebourgeois and Christophe Garcia and Adel M. Alimi},
  journal={International Journal on Document Analysis and Recognition (IJDAR)},
  year={2017},
  volume={21},
  pages={137-157}
}
The resolution enhancement of textual images poses a significant challenge mainly in the presence of noise. The inherent difficulties are twofold. First is the reconstruction of an upscaled version of the input low-resolution image without amplifying the effect of noise. Second is the achievement of an improved visual image quality and a better OCR accuracy. Classically, the issue is addressed by the application of a denoising step used as a preprocessing or a post-processing to the… CONTINUE READING

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