STS-Mixer decomposes 4D point cloud videos into multi-band spectral signals via graph transforms and mixes them with spatiotemporal representations to achieve better results on 3D action recognition and 4D semantic segmentation benchmarks.
Graph signal processing for ge- ometric data and beyond: Theory and applications.IEEE Transactions on Multimedia, 24:3961–3977, 2021
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STS-Mixer: Spatio-Temporal-Spectral Mixer for 4D Point Cloud Video Understanding
STS-Mixer decomposes 4D point cloud videos into multi-band spectral signals via graph transforms and mixes them with spatiotemporal representations to achieve better results on 3D action recognition and 4D semantic segmentation benchmarks.