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A Decision based restoration algorithm using Unsymmetrical Trimmed Mode filter for gray scale images that are corrupted by salt and pepper noise is proposed. The processed pixel is examined for 0 or 255; if checked pixel is equal to 0 or 255, then it is considered as noisy pixel else not noisy. If the pixel is noisy and all the four neighbors are noisy then replace the noisy pixel with mean of 4 neighbors...
A fixed $$3\times 3$$ 3 × 3 decision-based algorithm is proposed for the enhancement of images, and videos that are heavily corrupted by salt-and-pepper noise are proposed. The algorithm uses unsymmetrical trimmed variants for the noise removal. The corrupted pixel is replaced based on the number of non-noisy pixel in the current processing window. The proposed algorithm was applied on...
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