Spatial-Temporal Contrasting for Fine-Grained Urban Flow Inference
Fine-grained urban flow inference (FUFI) problem aims to infer the fine-grained flow maps from coarse-grained ones, benefiting various smart-city applications by reducing electricity, maintenance, and operation costs. Existing models use techniques from image super-resolution and achieve good performance in FUFI. However, they often rely on supervised learning with a large amount of training data, and often lack generalization capability and face overfitting. We present a new solution: S patial- T emporal C ontrasting for Fine-Grained Urban F low Inference (STCF). It consists of (i) two pre-training networks for spatial-temporal contrasting between flow maps; and (ii) one coupled fine-tuning network for fusing learned features. By attracting spatial-temporally similar flow maps while distancing dissimilar ones within the representation space, STCF enhances efficiency and performance. Comprehensive experiments on two large-scale, real-world urban flow datasets reveal that STCF reduces inference error by up to 13.5%, requiring significantly fewer data and model parameters than prior arts.
PDF
Datasets
Results from the Paper
| Task | Dataset | Model | Metric Name | Metric Value | Global Rank | Benchmark |
|---|---|---|---|---|---|---|
| Fine-Grained Urban Flow Inference | TaxiBJ-P1 | STCF | MSE | 14.9232 | # 1 | |
| Fine-Grained Urban Flow Inference | TaxiBJ-P2 | STCF | MSE | 18.2566 | # 1 | |
| Fine-Grained Urban Flow Inference | TaxiBJ-P3 | STCF | MSE | 19.4153 | # 1 | |
| Fine-Grained Urban Flow Inference | TaxiBJ-P4 | STCF | MSE | 11.7718 | # 1 |
