By Ali Mohammad Al-Haj
In recent times, the large development of electronic know-how has elevated the benefit with which electronic multimedia records are saved, transmitted, and reproduced. simply because conventional copyright tools are fallacious for constructing possession, electronic watermarking is taken into account the most effective recommendations to avoid unlawful and malicious copying and distribution of electronic media. complicated concepts in Multimedia Watermarking: picture, Video and Audio purposes introduces readers to state of the art study in multimedia watermarking. protecting new developments in electronic snapshot watermarking and methods for implementation and optimization throughout varied media, this ebook is a useful significant other for execs and researchers operating in parts comparable to record watermarking, multimedia fingerprinting, info hiding, secured e-commerce, copyright defense, and implementation of real-time multimedia watermarking.
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Extra resources for Advanced Techniques in Multimedia Watermarking: Image, Video and Audio Applications
1996). In the early work of Ramkumar et al. (1999) they introduce the notion of data hiding in images in which only the magnitude of the discrete Fourier transform (DFT) coefficients are altered to embed the hidden information bits. While this technique proposes a similar idea to our approach, it differs completely in the actual methodology. In Honsinger (2000), a method of data embedding based on the convolution of the hidden message data with a random phase carrier is presented with results that promise robustness to printing and scanning.
Below is the algorithm for the slice through a cube by a plane parallel to xOy, the other cases being similar. …………….. for i=0 to lx-1 for j=0 to ly-1 M2D(i,j)=M(i,j,p) end for j; end for i; …………………………….. g. polygonal meshes). 12 Figure 6. The virtual graph embedded into 3D image The main idea of watermarking technique is the use of the 3D virtual graph that is considered embedded in the image. In our case this virtual graph is composed by the cells of a honeycomb. Then, the 3D model is considered as a sequence of slices that represent sections of the 3D model.
2008). There is a variety of modern and possible sophisticated attacks which the technological advancement has posed in the current age. The transformations (attacks) that can be done on 3D models are: rotation, re-dimension, mesh optimization, tri-dimensional cropping. Because it is not known what transformation the user did, all these transformations are verified one by one and the percent of similitude between the original 3D model and the verified one is returned. The cube is centered at (0,0,0), so the corners are the coordinates (250,250,-250).