Scientific Programming / 2020 / Article / Tab 3

Research Article

Multipurpose Watermarking Algorithm for Medical Images

Table 3

Similarity of the extracted watermark based on two algorithms.

Attacking modeRobust watermark similarity (NC)
Algorithm 1Algorithm 2

No attack11
Gaussian low-pass filter0.9380.937
Median filter [3, 3]0.9420.943
Gaussian noise (0.05)0.9520.949
Salt and pepper noise (0.03)0.9570.956
Shear (1/16)0.9210.921
JPEG compression Q = 200.9240.922
JPEG compression Q = 500.9650.964
Shrink 10%0.9850.985
Rotate 30°C0.9820.982

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