Energy-Aware Imitation Learning for Steering Prediction Using Events and Frames
Authors: Hu Cao, Jiong Liu, Xingzhuo Yan, Rui Song, Yan Xia, Walter Zimmer, Guang Chen, Alois Knoll
Organizations: School of Automation, Southeast University, Sipailou 2, Nanjing, 210096, China. · Chair of Robotics, Artificial Intelligence and Real-time Systems, Technical University of Munich, Boltzmannstraße 15, Munich, 85748, Germany. · School of Computer Science and Technology, Tongji University, Cao’an Road, Shanghai, 200070, China.
In autonomous driving, relying solely on frame-based cameras can lead to inaccuracies caused by factors like long exposure times, high-speed motion, and challenging lighting conditions. To address these issues, we introduce a bio-inspired vision sensor known as the event camera. Unlike conventional cameras, event cameras capture sparse, asynchronous events that provide a complementary modality to mitigate these challenges. In this work, we propose an energy-aware imitation learning framework for steering prediction that leverages both events and frames. Specifically, we design an Energy-driven Cross-modality Fusion Module (ECFM) and an energy-aware decoder to produce reliable and safe predictions. Extensive experiments on two public real-world datasets, DDD20 and DRFuser, demonstrate that our method outperforms existing state-of-the-art (SOTA) approaches. The codes and trained models will be released upon acceptance.
Figures & tables
Figure 1: Performance comparison on the DDD20 and DRFuser datasets. Our proposed method achieves SOTA performance, outperforming previous approaches EyEF Zhou et al. (2025) , CAFR Cao et al. (2024) , DRFuser Munir et al. (2023) , and EFNet Sun et al. (2022) in terms of RMSE and MAE metrics.
Figure 2: The proposed model architecture consists of three main components: a dual-stream backbone network, ECFM modules, and an energy-aware decoder. The backbone network comprises two branches: the event-based ResNet at the bottom and the frame-based ResNet He et al. (2016) at the top. Each ECFM module operates to enhance features across different hierarchical scales. Subsequently, the energy-aware decoder is used to perform steering angle predictions.
Figure 3: The architecture of the proposed ECFM. 3D weights are generated based on energy function. In ECFM, fused features Fffused and Fefused from the frame and event branches are concatenated and then passed through a Conv1×1 layer to produce the final output, Fo . Notably, this Conv1×1 layer is the only learnable component within ECFM.
Architecture
Layers
Input Dimension
Output Dimension
Decoder with ResNet-50
Convolution 2D
2048
1024
Batch normalization
1024
1024
ReLU
1024
1024
Convolution 2D
1024
512
Batch normalization
512
512
Dropout
512
512
Table 1: The detailed architecture of the decoder in the proposed network.
Method
Model Type
Params (M, ↓ )
FLOPs (G, ↓ )
FPS ( ↑ )
RMSE ( ↓ )
MAE ( ↓ )
Bojarski et al. Bojarski (2016)
Frames only
-
-
-
0.1574
-
CNN-LSTM Xu et al. (2017)
-
-
-
0.1429
-
Maqueda et al. Maqueda et al. (2018)
Events Only
-
-
-
0.0716
-
Hu et al. Hu et al. (2020)
Frames + Events
-
-
-
0.0721
-
FAGC Cao et al. (2021)
312.3
88.0
55.5
0.0501
0.0317
EFNet Sun et al. (2022)
139.5
36.8
62.1
0.0430
0.0297
Table 2: Comparison with SOTA methods on the DDD20 dataset. ↑ indicates metrics where higher values signify better performance, and ↓ indicates metrics where lower values are the better.
Method
Model Type
Params (M, ↓ )
FLOPs (G, ↓ )
FPS ( ↑ )
RMSE ( ↓ )
MAE ( ↓ )
FAGC Cao et al. (2021)
Frames + Events
312.3
88.0
56.4
0.1997
0.0240
EFNet Sun et al. (2022)
139.5
36.8
62.3
0.2166
0.0241
DRFuser Munir et al. (2023)
89.3
28.2
35.6
0.2919
0.0396
CAFR Cao et al. (2024)
100.4
24.8
62.5
0.2209
0.0346
EyEF Zhou et al. (2025)
72.7
17.0
46.1
0.1032
0.0130
Ours
76.2
38.4
47.2
0.0801
0.0102
Table 3: Comparison with SOTA methods on the DRFuser dataset. ↑ indicates metrics where higher values signify better performance, and ↓ indicates metrics where lower values are the better.
Figure 4: A quantitative comparison of our proposed method with EyEF Zhou et al. (2025) and DRFuser Munir et al. (2023) on the DDD20 and DRFuser datasets.
Figure 5: The visualization of steering angle prediction in comparison to ground truth on DDD20 (top) and DRFuser (bottom) datasets. Each pair of samples consists of frame data on the left and event data on the right.
Figure 6: Performance vs. model size on the DRFuser dataset. Our proposed method achieves a new SOTA performance while utilizing significantly less number of parameters than previous methods.
Method
RMSE ( ↓ )
MAE ( ↓ )
Events only
0.5102
0.1501
Frames only
0.4609
0.1093
Add directly
0.3499
0.0434
Additive attention
0.2986
0.0403
Ours
0.0801
0.0102
Table 4: Quantitative comparison with different ablation settings. “Add directly” (fusing events and frames by directly using addition operations); “Additive attention” (fusing events and frames by using basic attention operations; see the Appendix for more details).
Integrate
Energy Loss
RMSE
MAE
✗
✗
0.1016
0.0122
✓
✗
0.0909
0.0120
✗
✓
0.0898
0.0108
✓
✓
0.0801
0.0102
Table 5: Quantitative comparison with different decoder designs.
Figure 7: The addition baseline model consists of three main components: a dual-stream backbone network, addition modules, and a prediction decoder.
Figure 8: The architecture of the additive attention.
Figure 9: The additive attention baseline model consists of three main components: a dual-stream backbone network, additive attention modules, and a prediction decoder.
Figure 10: Representative examples of different activation maps on the DRFuser dataset are: (a) event activation map before ECFM; (b) RGB activation map before ECFM; and (c) fused activation map after ECFM.
Autonomous driving develops vehicles that perceive road scenes, predict interactions, and plan and control safe movement with limited or no human input.
Event cameras sense the world through asynchronous brightness changes with microsecond latency and high dynamic range, offering motion fidelity far beyond frame-based sensors and capturing temporal structure that conventional exposures often miss. These properties make events a powerful complement to RGB in autonomous driving, especially under blur, glare, and rapid motion, where frame-based perception can become unreliable. However, existing event-aware vision-language models remain limited to generic perception and do not reveal how event sensing contributes to reasoning and decision-making across the full driving loop. We present EventDrive, a large-scale benchmark and model suite that unifies event streams, RGB frames, and language supervision across four core dimensions: Perception, Understanding, Prediction, and Planning, covering captions, structured QA, grounding, motion-state recognition, trajectory forecasting, and planning tasks. Building on this foundation, EventDrive-VLM introduces a multi-horizon event pyramid and a temporal-horizon mixture-of-experts module to adaptively encode and fuse asynchronous and frame-based information for downstream reasoning. Comprehensive evaluation across diverse tasks shows that event streams provide substantial gains in temporal precision, motion awareness, and robustness, bringing event sensing into the center of driving intelligence.
Current end-to-end autonomous driving systems predominantly rely on frame-based sensors, which suffer from inherent perception latency and motion blur during highly dynamic encounters, specifically sudden pedestrian crossings. To address this critical safety vulnerability, we propose DeepIPCv3, a novel multi-modal autonomous navigation framework that synergizes the dense 3D spatial geometry of LiDAR point clouds with the microsecond-level asynchronous event streams of a Dynamic Vision Sensor (DVS). We introduce a Transformer-inspired cross-modal attention mechanism to dynamically correlate these distinct modalities, allowing the network to instantaneously prioritize high-speed dynamic updates without sacrificing structural scene awareness. The fused latent representations are then mapped to safe local waypoints and executable control commands via a hybrid policy network that blends heuristic trajectory tracking with direct neural predictions. Due to the severe physical risks associated with live testing of these sudden crossing scenarios, the framework is rigorously evaluated offline using a custom multi-modal dataset collected across both well-illuminated noon and challenging evening conditions. Extensive comparative and ablation studies demonstrate that DeepIPCv3 achieves state-of-the-art predictive performance. By effectively eliminating exposure failures and motion blur, the proposed LiDAR and DVS fusion yields the lowest trajectory and control command errors, enabling highly reactive, mathematically bounded evasive maneuvers regardless of ambient illumination. To support future research, we will release the codes to our GitHub repo at https://github.com/oskarnatan/DeepIPCv3.
Oskar Natan, Andi Dharmawan, Aufaclav Zatu Kusuma Frisky +2
Department of Computer Science and Electronics, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
End-to-end autonomous driving increasingly leverages self-supervised video pretraining to learn transferable planning representations. However, pretraining video world models for scene understanding has so far brought only limited improvements. This limitation is compounded by the inherent ambiguity of driving: each scene typically provides only a single human trajectory, making it difficult to learn multimodal behaviors. In this work, we propose Drive-JEPA, a framework that integrates Video Joint-Embedding Predictive Architecture (V-JEPA) with multimodal trajectory distillation for end-to-end driving. First, we adapt V-JEPA for end-to-end driving, pretraining a ViT encoder on large-scale driving videos to produce predictive representations aligned with trajectory planning. Second, we introduce a proposal-centric planner that distills diverse simulator-generated trajectories alongside human trajectories, with a momentum-aware selection mechanism to promote stable and safe behavior. When evaluated on NAVSIM, the V-JEPA representation combined with a simple transformer-based decoder outperforms prior methods by 3 PDMS in the perception-free setting. The complete Drive-JEPA framework achieves 93.3 PDMS on v1 and 87.8 EPDMS on v2, setting a new state-of-the-art.
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Virginia Tech · Purdue University · XPENG Motors +1