Fast Spatio-temporal Compression of Dynamic 3D Meshes

TL;DR

This paper introduces a novel compression method for dynamic 3D meshes that leverages spatio-temporal coherence, achieving high efficiency and low bit rates while maintaining visual quality.

Contribution

The proposed scheme uniquely combines spatial and temporal redundancy exploitation by projecting differential coordinates onto the covariance subspace, outperforming existing methods.

Findings

Achieves low bit-per-vertex per-frame rates.

Provides faster execution times.

Maintains high visual quality of animations.

Abstract

3D representations of highly deformable 3D models, such as dynamic 3D meshes, have recently become very popular due to their wide applicability in various domains. This trend inevitably leads to a demand for storage and transmission of voluminous data sets, making the need for the design of a robust and reliable compression scheme a necessity. In this work, we present an approach for dynamic 3D mesh compression, that effectively exploits the spatio-temporal coherence of animated sequences, achieving low compression ratios without noticeably affecting the visual quality of the animation. We show that, on contrary to mainstream approaches that either exploit spatial (e.g., spectral coding) or temporal redundancies (e.g., PCA-based method), the proposed scheme, achieves increased efficiency, by projecting the differential coordinates sequence to the subspace of the covariance of the point trajectories. An extensive evaluation study, using different dynamic 3D models, highlights the benefits of the proposed approach in terms of both execution time and reconstruction quality, providing extremely low bit-per-vertex per-frame (bpvf) rates.