From: Robust image hashing with compressed sensing and ordinal measures
Operation | Maximum | Minimum | Mean | Standard deviation |
---|---|---|---|---|
Brightness adjustment | 64.76 | 4.24 | 20.18 | 10.53 |
Contrast adjustment | 36.74 | 3.74 | 14.23 | 6.12 |
Gamma correction | 62.08 | 7.62 | 22.92 | 10.07 |
3 × 3 Gaussian low-pass filtering | 36.47 | 0 | 14.96 | 7.90 |
Speckle noise | 57.97 | 6.16 | 18.88 | 9.21 |
Salt and pepper noise | 47.14 | 3.46 | 18.30 | 8.35 |
JPEG compression | 59.32 | 7.35 | 21.28 | 9.19 |
Watermark embedding | 60.66 | 3.74 | 17.77 | 9.81 |
Image scaling | 59.11 | 9.80 | 24.42 | 9.62 |
Rotation, cropping, and rescaling | 145.70 | 21.82 | 65.74 | 24.06 |