A cascaded hybrid diffusion framework generates coarse road-segment trajectories first, then high-fidelity GPS trajectories conditioned on them, outperforming trajectory-synthesis baselines on JSD metrics.
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Leveraging the Spatial Hierarchy: Coarse-to-fine Trajectory Generation via Cascaded Hybrid Diffusion
A cascaded hybrid diffusion framework generates coarse road-segment trajectories first, then high-fidelity GPS trajectories conditioned on them, outperforming trajectory-synthesis baselines on JSD metrics.