Watermarking mesh-based representations of 3-D objects using local moments.
IEEE Trans Image Process
; 15(3): 687-701, 2006 Mar.
Article
em En
| MEDLINE
| ID: mdl-16519355
ABSTRACT
A new methodology for fingerprinting and watermarking three-dimensional (3-D) graphical objects is proposed in this paper. The 3-D graphical objects are described by means of polygonal meshes. The information to be embedded is provided as a binary code. A watermarking methodology has two stages embedding and detecting the information that has been embedded in the given media. The information is embedded by means of local geometrical perturbations while maintaining the local connectivity. A neighborhood localized measure is used for selecting appropriate vertices for watermarking. A study is undertaken in order to verify the suitability of this measure for selecting vertices from regions where geometrical perturbations are less perceptible. Two different watermarking algorithms, that do not require the original 3-D graphical object in the detection stage, are proposed. The two algorithms differ with respect to the type of constraint to be embedded in the local structure by using parallel planes and bounding ellipsoids, respectively. The information capacity of various 3-D meshes is analyzed when using the proposed 3-D watermarking algorithms. The robustness of the 3-D watermarking algorithms is tested to noise perturbation and to object cropping.
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Base de dados:
MEDLINE
Assunto principal:
Rotulagem de Produtos
/
Algoritmos
/
Processamento de Sinais Assistido por Computador
/
Interpretação de Imagem Assistida por Computador
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Imageamento Tridimensional
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Compressão de Dados
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article