Papers › Motion Inbetweening via Deep Δ-Interpolator
Motion Inbetweening via Deep Δ-Interpolator
Boris N. Oreshkin, Antonios Valkanas, Félix G. Harvey, Louis-Simon Ménard, Florent Bocquelet, Mark J. Coates
We show that the task of synthesizing human motion conditioned on a set of key frames can be solved more accurately and effectively if a deep learning based interpolator operates in the delta mode using the spherical linear interpolator as a baseline. We empirically demonstrate the strength of our approach on publicly available datasets achieving state-of-the-art performance. We further generalize these results by showing that the Δ-regime is viable with respect to the reference of the last known frame (also known as the zero-velocity model). This supports the more general conclusion that operating in the reference frame local to input frames is more accurate and robust than in the global (world) reference frame advocated in previous work. Our code is publicly available at https://github.com/boreshkinai/delta-interpolator.
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Code
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Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2P@15 | 0.47 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2P@30 | 1.00 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2P@5 | 0.13 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2Q@15 | 0.32 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2Q@30 | 0.57 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | L2Q@5 | 0.11 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | NPSS@15 | 0.0217 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | NPSS@30 | 0.1217 | #1 of 4 | Archive leaderboard | report |
| Motion Synthesis | LaFAN1 | $\Delta$-interpolator | NPSS@5 | 0.0014 | #1 of 4 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
Methods
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