Coding scheme for a data stream representing a temporally varying graphics model

Abstract

To rapidly retrieve and specify a product including a specific component from data on production results, and to output a retrieval result with priority order set in the case that a plurality of candidates are retrieved. In this product data retrieval system, data of a product configuration are produced from data on work results and are stored so as to rapidly specify the product including the specific component, and the rapid retrieval related to the product is performed by use of it. In the case that the plurality of candidates can be specified and cannot be narrowed down to one candidate, strong / weak data on possibility are imparted by totaling frequency of the possibility to perform the retrieval.

Description

technical field [0001] The present invention relates to the encoding and decoding of a data stream representing a time-varying graphical model, and in particular to the compression of the graphical model data. Background technique [0002] Today, time-varying 3D computer graphics models are widely used in the field of classical computer graphics. For example, 3D computer graphics models are used in games, virtual worlds, animation, etc., but also in the latest systems called Free Viewpoint Video (FVV) or 3D Video Objects (3DVO). [0003] A 3D computer graphics model describes the surface of a 3D object in a virtual 3D coordinate system. For this, the 3D coordinates (x, y, z) of a certain number of control points or vertices lying on or arranged along the surface are defined. Continuous surfaces are defined by different parameterization methods. For example in a parametric method known as polygon mesh, the shape of the surface of a 3D object is defined by polygons, where t...

AI Technical Summary

Problems solved by technology

The disadvantage of such animation models is that they cannot be translated to the general case, i.e. they are limited to special motion sequences and / or special objects, such as faces, etc.

If no animation model exists, then at each moment will have to pass a new 3D model or a new mesh of control points, and then encode it with MPEG-4 3DMC at each moment, but because at each moment it is The same object is moving, so the data also contains a lot of temporal redundancy, which can be used for further compression

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