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Perceptual metrics for static and dynamic triangle meshes
- EUROGRAPHICS
, 2012
"... Almost all mesh processing procedures cause some more or less visible changes in the appearance of objects represented by polygonal meshes. In many cases, such as mesh watermarking, simplification or lossy compression, the objective is to make the change in appearance negligible, or as small as poss ..."
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Cited by 9 (3 self)
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Almost all mesh processing procedures cause some more or less visible changes in the appearance of objects represented by polygonal meshes. In many cases, such as mesh watermarking, simplification or lossy compression, the objective is to make the change in appearance negligible, or as small as possible, given some other constraints. Measuring the amount of distortion requires taking into account the final purpose of the data. In many applications, the final consumer of the data is a human observer, and therefore the perceptibility of the introduced appearance change by a human observer should be the criterion that is taken into account when designing and configuring the processing algorithms. In this review, we discuss the existing comparison metrics for static and dynamic (animated) triangle meshes. We describe the concepts used in perception-oriented metrics used for 2D image comparison, and we show how these concepts are employed in existing 3D mesh metrics. We describe the character of subjective data used for evaluation of mesh metrics and provide comparison results identifying the advantages and drawbacks of each method. Finally, we also discuss employing the perception-correlated metrics in perception-oriented mesh processing algorithms.
Spatially and Temporally Scalable Compression of Animated 3D Meshes with
- MPEG-4/FAMC,” Proceedings of the IEEE International Conference on Image Processing
, 2008
"... We introduce an efficient method for scalable compression of animated 3D meshes. The approach consists of a combination of interframe motion compensation and layer-wise predictive coding of remaining residuals. It is shown that motion compensated predictive coding can lead to a significant improveme ..."
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Cited by 5 (2 self)
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We introduce an efficient method for scalable compression of animated 3D meshes. The approach consists of a combination of interframe motion compensation and layer-wise predictive coding of remaining residuals. It is shown that motion compensated predictive coding can lead to a significant improvement in compression performance upon the current state of the art with gains of over 40%. In addition, the created bit stream is temporally and spatially scalable allowing an adaptation to network transfer rates and end-user devices. This compression method is currently standardized within MPEG as part of MPEG-4 AFX Amd. 2, where it is referred to as
MOTION-BASED MESH CLUSTERING FOR MCDWT COMPRESSION OF 3D ANIMATED MESHES
"... We present an efficient compression algorithm for sequences of triangular meshes with fixed connectivity. Our two main contributions in this paper are: a clustering technique which regroups the vertices following the same affine motion; a geometry compensation technique based on the estimation of 3D ..."
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Cited by 4 (3 self)
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We present an efficient compression algorithm for sequences of triangular meshes with fixed connectivity. Our two main contributions in this paper are: a clustering technique which regroups the vertices following the same affine motion; a geometry compensation technique based on the estimation of 3D motion parameters which are modeled by affine transform matrices. Then, a scanbased temporal discrete wavelet transform is applied on the compensated sequence, and the resulting wavelet coefficients are finally encoded by an efficient coding scheme which includes a bit allocation process. Simulation results show that our compression method provides good compression performances compared to some state of the art coders. 1.
Compression of Human Body Sequences Using graph wavelet filterbanks
- In Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing Florence
, 2014
"... Abstract—The next step in immersive communication beyond video from a single camera is object-based free viewpoint video, which is the capture and compression of a dynamic object such that it can be reconstructed and viewed from an arbitrary viewpoint. The moving human body is a particularly useful ..."
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Cited by 4 (1 self)
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Abstract—The next step in immersive communication beyond video from a single camera is object-based free viewpoint video, which is the capture and compression of a dynamic object such that it can be reconstructed and viewed from an arbitrary viewpoint. The moving human body is a particularly useful subclass of dynamic object for object-based free viewpoint video relevant to both telepresence and entertainment. In this paper, we compress moving human body sequences by applying recently developed Graph Wavelet Filter Banks to time-varying geometry and color signals living on a mesh representation of the human body. This model-based approach significantly outperforms state-of-the-art coding of the human body represented as ordinary depth plus color video sequences. I.
Compressing dynamic meshes with geometric Laplacians
"... This paper addresses the problem of representing dynamic 3D meshes in a compact way, so that they can be stored and transmitted efficiently. We focus on sequences of triangle meshes with shared connectivity, avoiding the necessity of having a skinning structure. Our method first computes an average ..."
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Cited by 2 (1 self)
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This paper addresses the problem of representing dynamic 3D meshes in a compact way, so that they can be stored and transmitted efficiently. We focus on sequences of triangle meshes with shared connectivity, avoiding the necessity of having a skinning structure. Our method first computes an average mesh of the whole sequence in edge shape space. A discrete geometric Laplacian of this average surface is then used to encode the coefficients that describe the trajectories of the mesh vertices. Optionally, a novel spatio-temporal predictor may be applied to the trajectories to further improve the compression rate. We demonstrate that our approach outperforms the current state of the art in terms of low data rate at a given perceived distortion, as measured by the STED and KG error metrics.
The new mpeg-4/famc standard for animated 3d mesh compression
- In 3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video
, 2008
"... The new MPEG-4/FAMC standard for animated 3D mesh compression ..."
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Cited by 1 (0 self)
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The new MPEG-4/FAMC standard for animated 3D mesh compression
Temporal wavelet-based compression of 3D animated meshes using motion-based clustering
"... Abstract This paper presents an efficient compression algorithm to encode the geometry of 3D mesh sequences with fixed connectivity. The proposed approach includes a temporal scan-based wavelet transform and motion compensation of the mesh geometry. Motion estimation/compensation is performed thanks ..."
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Abstract This paper presents an efficient compression algorithm to encode the geometry of 3D mesh sequences with fixed connectivity. The proposed approach includes a temporal scan-based wavelet transform and motion compensation of the mesh geometry. Motion estimation/compensation is performed thanks to an efficient motion-based clustering approach The motion parameters are modeled by affine transforms matrix which are coded losslessly using arithmetic coding. Simulation results show that the proposed method provides good compression performances.
