Restoration of impulse noise corrupted images based on gradients

ShuQun Zhang; Mohammad A. Karim

doi:10.1117/12.411596

28 December 2000 Restoration of impulse noise corrupted images based on gradients

ShuQun Zhang, Mohammad A. Karim

Proceedings Volume 4115, Applications of Digital Image Processing XXIII; (2000) https://doi.org/10.1117/12.411596
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

A new filtering algorithm is presented which can remove impulse noise from corrupted images while preserving details. The algorithm is based on a new impulse detection technique that uses image gradients. The proposed impulse detector can effectively categorize all the pixels in an image into two classes -- noise pixels and noise-free pixels. The noise-free pixels are kept untouched while the noise pixels are filtered by a noise cancellor such as median filter. Experimental results show that the proposed algorithm provides significant improvement over many existing techniques in terms of both subjective and objective evaluations. It also has the advantage of computational simplicity over those algorithms.

Citation Download Citation

ShuQun Zhang and Mohammad A. Karim "Restoration of impulse noise corrupted images based on gradients", Proc. SPIE 4115, Applications of Digital Image Processing XXIII, (28 December 2000); https://doi.org/10.1117/12.411596

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KEYWORDS

Sensors

Digital filtering

Switching

Image filtering

Detection and tracking algorithms

Computer simulations

Bridges

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