Robust image hashing through DWT-SVD and spectral residual method

EURASIP Journal on Image and Video Processing

Table 4 Robustness results of 53 × 76 = 4024 image pairs

Operation	Minimum	Maximum	Mean	Standard deviation
Brightness changes	0.032	0.112	0.063	24.32
Contrast changes	0.041	0.119	0.059	25.78
Gamma correction	0.084	0.14	0.082	26.34
Salt and Pepper noise	0.056	0.098	0.074	27.71
Speckle noise	0.048	0.091	0.063	24.84
Gaussian filtering with size 3 × 3	0.081	0.152	0.094	31.27
JPEG compression	0.061	0.179	0.124	32.91
Watermarking embedding	0.032	0.172	0.134	23.72
Scaling	0.078	0.139	0.148	24.39
Rotation	0.089	0.131	0.092	32.58