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�������պ����ѧѧ�� 2008, Vol. 34 Issue (03) :331-335    DOI:
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Octree-based blind watermarking on 3D meshes
Qi Yue, Shu Jun, Shen Xukun, Cai Su*
State Key Laboratory of Virtual Reality Technology and System, Beijing University of Aeronantics And Astronautics, Beijing 100083, China

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ժҪ ³��������ˮӡ�ر���äˮӡ�DZ���������Ʒ��Ȩ����Ҫ�ֶ�.���һ�������ά����ģ�͵�äˮӡ�㷨.����ͨ��PCA(Principle Component Analysis)��ģ�ͽ���Ԥ����,��ģ�͵�����Ψһ����̬����,Ȼ�����άģ�ͽ����ʷֵõ��˲���.���������RGB(Red, Green, Blue)ˮӡ��Ϣͼ�����漴����������Կ,����ˮӡ��Ϣ��������Ϊϸ΢�Ŷ���ϢǶ�뵽�˲����ײ�ڵ�����Ķ���������.��ȡˮӡʱ����Ҫԭʼģ������,����ģ�������޹�,��ֱ�ӶԵ������ݽ���ˮӡǶ��.�ص���Ƕ��������,�ɵֿ���ת��ƽ�ơ��������źͶ��������򹥻�.���ݰ˲����߲�ڵ�����ȡģ�͵�������������ˮӡ,��ע�ᵽ��������֤��,��������һ���̶��ϵֿ����Ȼ����������������񻯵ȹ���,���н�ǿ��³���Ժ�������.
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Abstract�� Robust blind watermarking is the important method for digital works copyright protection. A novel blind watermarking method on 3D meshes was proposed. PCA (primary component analysis) was used for 3D meshes- preprocessing to make a unique model posture. After making division of the 3D meshes based octree, octree structure could be obtained. A random scrambling was made for the RGB(red, green, blue) meaningful watermark image before embedding it into the bottom octree nodes. This method can be used directly on points-cloud, as it does nothing with the topology of the meshes. It is robust against translation, rotation, uniform scaling and random vertex reordering attacks. In addition, a method to generate ‘Zero-Watermark’ based on higher codec of octree nodes was given. The ‘Zero-watermark’ was then registered in the third-party of notarization, and it can be robust against simplification, noise addition and remeshing attacks in some extent. This method has a big volume for embedding and high popularity.
Keywords�� three dimensional   principal component analysis   robustness   watermarking     
Received 2007-06-29;
Fund:

������Ȼ��ѧ����������Ŀ(60533070,60773153); ��������ѧ�����о��ش�������Ŀ (308004); �Ƽ����Ƽ�֧�żƻ�������Ŀ (2006BAK12B09); �����п�ί������Ŀ (Z07000100560714)

About author: �� Խ(1969-),��,������,������,qy@vrlab.buaa.edu.cn.
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��Խ,���,������,����.һ�ֻ��ڰ˲�������ά����äˮӡ�㷨[J]  �������պ����ѧѧ��, 2008,V34(03): 331-335
Qi Yue, Shu Jun, Shen Xukun, Cai Su.Octree-based blind watermarking on 3D meshes[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(03): 331-335
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I03/331
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