Mesh Watermarking based on 2D Transferred Domain

Jongyun Jun

Tae-Joon Kim

CS548 Term Project Presentation

2010/05/13

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● Basic watermarking embedding

Watermarking

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Watermarking

● Basic watermarking extracting

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Watermarking Examples

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3D Mesh Data

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3D Mesh Data

Similarity transform Noise

SimplifySmoothing

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Watermarking on 3D

● Challenges● Handling complex geometrical and

topological operations● No unique representation of data

●Format conversion● No implicit order of data

●Cf.) Image (pixel) Audio, Video (time)● Various attacks

●Rotation, scaling, translation●Vertex addition/deletion

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Related Work

● 2D image watermarking● [Bruyndonckx et al. 1995.] Spatial method

for copyright labeling of digital images.● [Corvi et al. 1997] Wavelet-based image

watermarking for copyright protection.● [Cox et al. 1997] Secure spread spectrum

watermarking for multimedia.● [Zhu et al. 1998] Multiresolution

watermarking for images and video. ● [Luo et al. 2010] Reversible image

watermarking using interpolation technique

…

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Related Work

● Frequency domain

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Our Approaches

KAISTCox et al. 97

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Mapping

n!

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Geometry Image

● Conversion time : about 1 hour

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Spatial Coherency

Row-by-row Z curve Hilbert curve

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Original Watermarked Smoothed Noised

Rowbyrow

Correlation - 0.99 0.37 0.55

Z curve

Correlation - 0.99 0.97 0.83

Experimental Results

● Construction time : 130ms

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Conclusions

● Robust against various attacks● Rotation, scaling, and translation● Smoothing● Noise

● Vertex addition/deletion● Simplification

● Fast watermark embedding/detection

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Q & A

Thank you!