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1. Salt-and-pepper noise, probability=0.1 Salt-and-pepper noise, probability=0.1, SNR = -2.094 Box_3x3, SNR = 6.250 Box_5x5, SNR = 8.213 Median_3x3, SNR = 15.040 Median_5x5, SNR = 15.674 1

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1. Salt-and-pepper noise, probability=0.1

Salt-and-pepper noise, probability=0.1, SNR = -2.094

Box_3x3, SNR = 6.250

Box_5x5, SNR = 8.213

Median_3x3, SNR = 15.040

Median_5x5, SNR = 15.674

Opening-then-closing, SNR = -2.101

Closing-then-opening, SNR = -2.534

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