A Perceptive Approach to Digital Image Watermarking Using a Brightness Model and the Hermite Transform

<div>(a) Correlation values and threshold obtained after filtering the watermarked Lena image with a Gaussian filter. (b) Correlation values and threshold obtained after filtering the watermarked Lena image with a median filter.</div>

Mathematical Problems in Engineering

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Figure 5

Figure 5: A Perceptive Approach to Digital Image Watermarking Using a Brightness Model and the Hermite Transform 