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Iterative Adaptive Unsymmetric Trimmed Shock Filter for High-Density Salt-and-Pepper Noise Removal

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Abstract

In this paper, an iterative adaptive unsymmetric trimmed shock filter based on partial differential equations (PDE) is proposed to remove high-density salt-and-pepper noise by preserving the edge details in the images. This algorithm consists of two steps: identification of pixels affected by the salt-and-pepper noise and recovery of these noisy pixels using adaptive unsymmetric trimmed shock filter. Shock filter has been used in image processing literature for image restoration and enhancement task. However, its use was limited to unwanted noise removal, enhancement, despeckling, etc. In the proposed work, a modified form of shock filter termed as adaptive unsymmetric trimmed shock filter is designed to remove the salt-and-pepper noise. The proposed algorithm is tested with different test images. Three performance evaluation measures: PSNR, CR and MSSIM are used to validate the proposed scheme. The performance of the proposed algorithm claims better results than the other considered eight existing state-of-the-art techniques.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, National Institute of Technology Goa, Farmagudi, Ponda, Goa, 403401, India

    T. Veerakumar

  2. Department of Electrical Engineering, Indian Institute of Technology Jammu, Jammu, Jammu & Kashmir, 181221, India

    Badri Narayan Subudhi

  3. Department of Instrumentation and Control Engineering, PSG College of Technology, Coimbatore, 641004, India

    S. Esakkirajan

  4. Department of Electronics and Communication Engineering, Institute of Aeronautical Engineering, Dundigal, Hyderabad, 500043, India

    Prasanta Kumar Pradhan

Authors
  1. T. Veerakumar
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  2. Badri Narayan Subudhi
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  3. S. Esakkirajan
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  4. Prasanta Kumar Pradhan
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Correspondence to T. Veerakumar.

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Veerakumar, T., Subudhi, B.N., Esakkirajan, S. et al. Iterative Adaptive Unsymmetric Trimmed Shock Filter for High-Density Salt-and-Pepper Noise Removal. Circuits Syst Signal Process 38, 2630–2652 (2019). https://doi.org/10.1007/s00034-018-0984-4

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  • DOI: https://doi.org/10.1007/s00034-018-0984-4

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