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Pixel QUAD based Reversible Data Hiding for High Embedding Capacity

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Figure

Fig. 1: Conventional and Reversible Watermarking scheme
Fig. 3: A simple Quad for explaining difference expansion after forward transform.
Figure 5. This tree concisely represents the entire life cycle of aparticular pixel pair upto P passes
Fig. 4: An Illustration of possible combination of embedding bits for aPixel-Quad.
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