Download 3D Object Processing: Compression, Indexing and Watermarking by Jean-Luc Dugelay, Atilla Baskurt, Mohamed Daoudi PDF
By Jean-Luc Dugelay, Atilla Baskurt, Mohamed Daoudi
The coming, and carrying on with evolution, of top quality 3D gadgets has been made attainable by means of fresh growth in 3D scanner acquisition and 3D pix rendering. With this expanding caliber comes a corresponding raise within the dimension and complexity of the knowledge documents and the need for advances in compression recommendations. powerful indexing to facilitate the retrieval of the 3D information is then required to successfully shop, seek and recapture the items which were compressed. the applying of 3D pictures in fields equivalent to communications, medication and the army additionally demands copyright safety, or watermarking, to safe the information for transmission.
Written by way of specialist members, this well timed textual content brings jointly the 3 vital and complementary subject matters of compression, retrieval and watermarking thoughts for 3D objects. 3D item processing purposes are constructing speedily and this e-book tackles the demanding situations and possibilities offered, concentrating on the safe transmission, sharing and looking of 3D gadgets on networks, and includes:
- an creation to the widely used 3D illustration schemes; the features, benefits and barriers of polygonal meshes, floor established types and volumetric models;
- 3D compression innovations; the 3D coding and deciphering schemes for lowering the dimensions of 3D info to minimize transmission time and reduce distortion;
- state of the paintings responses to the intrinsic demanding situations of establishing a 3D-model seek engine, contemplating view-based, structural and full-3D approaches;
- watermarking thoughts for making sure highbrow estate safeguard and content material protection with out changing the visible caliber of the 3D item.
3D item Processing: Compression, Indexing and Watermarking is a useful source for graduate scholars and researchers operating in sign and photo processing, laptop aided layout, animation and imaging structures. training engineers who are looking to extend their wisdom of 3D video gadgets, together with information compression, indexing, protection, and copyrighting of knowledge, also will locate this booklet of serious use. content material:
Chapter 1 uncomplicated history in 3D item Processing (pages 5–43): Guillaume Lavoue
Chapter 2 3D Compression (pages 45–86): Guillaume Lavoue, Florent Dupont and Professor Atilla Baskurt
Chapter three 3D Indexing and Retrieval (pages 87–138): Stefano Berretti, Mohamed Daoudi, Alberto Del Bimbo, Tarik Filali Ansary, Pietro Pala, Julien Tierny and Jean?Phillippe Vandeborre
Chapter four 3D item Watermarking (pages 139–183): Jihane Bennour, Professor Jean?Luc Dugelay, Emmanuel Garcia and Dr Nikos Nikolaidis
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Extra resources for 3D Object Processing: Compression, Indexing and Watermarking
Basically a polygonal mesh contains a set of 3D points (vertices) which are linked by edges to form a set of polygonal facets. • Parametric surface: this family of 3D surfaces (including B´ezier, B-spline and NURBS surfaces) is used particularly for computer-aided design (CAD). This model enables us to define mathematically exact surfaces, contrary to polygonal meshes which only represent an approximation. • Discrete representation: this model does not represent the 3D object in Euclidean space, but in a 3D grid similar to the 2D image representation.
They involve no loss of information. 2 Compression Ratio, Quality Evaluation The compression ratio is defined as the total number of bits necessary to represent the original information divided by the total number of bits of the binary file which will be stored. In practice, we use the bit rate to measure the compacting efficiency. The bit rate is expressed in bits per element. The latter is a ‘pixel’ if we are compressing a still or animated image, or a ‘sample’ for a signal or a vertex if we are dealing with a 3D object.
2004) (where a color is used to represent a plane). 2 3D Data Source There are several ways to produce 3D content, but basically we can distinguish two principal classes: • The acquisition, which reproduces a real-world object, like a camera for 2D images. • The manual creation, using specific software, similar to a painting of 2D images. 1 Acquisition The main objective is to create a 3D object which reproduces a given realworld object, like a photograph represents a real-world image. g. g. tomography).