Mesh Watermarking based on 2D Transferred Domain Jongyun Jun Tae-Joon Kim CS548 Term Project Presentation 2010/05/13

2 ● Basic watermarking embedding Watermarking

3 ● Basic watermarking extracting

4 Watermarking Examples

5 3D Mesh Data

6 Similarity transform Noise SimplifySmoothing

7 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

8 Related Work ● 2D image watermarking ● [Bruyndonckx et al ] 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 …

9 Related Work ● Frequency domain

10 Our Approaches KAIST Cox et al. 97

11 Mapping n!

12 Geometry Image ● Conversion time : about 1 hour

13 Spatial Coherency Row-by-row Z curveHilbert curve

14 OriginalWatermarkedSmoothedNoised Row by row Correlation Z curve Correlation Experimental Results ● Construction time : 130ms

15 Conclusions ● Robust against various attacks ● Rotation, scaling, and translation ● Smoothing ● Noise ● Vertex addition/deletion ● Simplification ● Fast watermark embedding/detection

16 Q & A Thank you!