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Fig. 5 | Cybersecurity

Fig. 5

From: Deep 3D mesh watermarking with self-adaptive robustness

Fig. 5

This is a 3D model of a desk. In the bottom right figure, the desktop is flat and the normal vector \({\mathbf {n}}_i\) is perpendicular to the local area. For each \(j\in {\mathcal {N}}_i\), \(\theta _{ij}=90^{\circ }\). The bottom left figure and the top right figure are the convexity and concavity of the the desk respectively, with \(\theta _{ij}>90^{\circ }\) and \(\theta _{ij}<90^{\circ }\)

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