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Table 1 HVS masking effect

From: Adaptive reversible image watermarking algorithm based on IWT and level set

Texture masking effect Luminance masking effect Number of embedded watermark
Texture smoothing block Low gray block 3
Texture smoothing block Middle gray block 2
Texture smoothing block High gray block 3
Medium complex block Low gray block 4
Medium complex block Middle gray block 3
Medium complex block High gray block 4
Texture complex block Low gray block 5
Texture complex block Middle gray block 4
Texture complex block High gray block 5