Learning-Based Lossless Compression of 3D Point Cloud Geometry

This paper presents a learning-based, lossless compression method for static point cloud geometry, based on context-adaptive arithmetic coding. Unlike most existing methods working in the octree domain, our encoder operates in a hybrid mode, mixing octree and voxel-based coding. We adaptively partit...

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Veröffentlicht in:Proceedings of the ... IEEE International Conference on Acoustics, Speech and Signal Processing (1998) S. 4220 - 4224
Hauptverfasser: Nguyen, Dat Thanh, Quach, Maurice, Valenzise, Giuseppe, Duhamel, Pierre
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 06.06.2021
Schlagworte:
context model
Deep Learning
Encoding
G-PCC
Geometry
Neural networks
Octrees
Point Cloud Compression
Probability distribution
Three-dimensional displays
Transform coding
ISSN:2379-190X
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Zusammenfassung:This paper presents a learning-based, lossless compression method for static point cloud geometry, based on context-adaptive arithmetic coding. Unlike most existing methods working in the octree domain, our encoder operates in a hybrid mode, mixing octree and voxel-based coding. We adaptively partition the point cloud into multi-resolution voxel blocks according to the point cloud structure, and use octree to signal the partitioning. On the one hand, octree representation can eliminate the sparsity in the point cloud. On the other hand, in the voxel domain, convolutions can be naturally expressed, and geometric information (i.e., planes, surfaces, etc.) is explicitly processed by a neural network. Our context model benefits from these properties and learns a probability distribution of the voxels using a deep convolutional neural network with masked filters, called VoxelDNN. Experiments show that our method outperforms the state-of-the-art MPEG G-PCC standard with average rate savings of 28% on a diverse set of point clouds from the Microsoft Voxelized Upper Bodies (MVUB) and MPEG. The implementation is available at https://github.com/Weafre/VoxelDNN.
ISSN:2379-190X
DOI:10.1109/ICASSP39728.2021.9414763