Fast detection and removal of impulsive noise using peer groups and fuzzy metrics
Journal of Visual Communication and Image Representation
Efficient impulse noise reduction via local directional gradients and fuzzy logic
Fuzzy Sets and Systems
Peer group switching filter for impulse noise reduction incolor images
Pattern Recognition Letters
An efficient median filter based method for removing random-valued impulse noise
Digital Signal Processing
IEEE Transactions on Signal Processing
Directional processing of color images: theory and experimental results
IEEE Transactions on Image Processing
Quaternion switching filter for impulse noise reduction in color image
Signal Processing
A switching weighted vector median filter based on edge detection
Signal Processing
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In this paper, a modified switching median filter is presented for noise reduction in color images that are corrupted with impulse (salt and pepper) noise. It is a two-phase noise detector: in the first phase, we use the adaptive vector median filter detection method to identify pixels that are likely to have been corrupted by noise (as noise candidates); in the second phase, these noise candidates are judged by using four one-dimensional Laplacian operators, which allow edge pixels to be preserved. Extensive experiments show that the proposed method outperforms many existing vector filters in terms of filtering performance. In particular, the proposed approach can effectively preserve thin lines, fine details, and image edges.