Datasets:

wufeim
/

lychsim_scenes

	---
	license: cc-by-4.0
	size_categories:
	- n<1K
	task_categories:
	- other
	dataset_info:
	features:
	- name: scene_name
	dtype: string
	- name: url
	dtype: string
	- name: roads
	list:
	- name: object_id
	dtype: string
	- name: status
	dtype: string
	- name: guid
	dtype: string
	- name: aabb
	struct:
	- name: center
	list: float64
	- name: extent
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	- name: obb
	struct:
	- name: center
	list: float64
	- name: extent
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	- name: rotation
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	- name: bounds
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: location
	list: int64
	- name: rotation
	list: float64
	- name: scale
	list: float64
	- name: color
	list: int64
	- name: sidewalks
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	- name: status
	dtype: string
	- name: guid
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	- name: aabb
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	- name: extent
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	- name: pedestrian_traj
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	dtype: string
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	- name: guid
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	- name: rotation
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	- name: extent
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	- name: obb
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: rotation
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	- name: bounds
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: location
	list: int64
	- name: rotation
	list: float64
	- name: scale
	list: int64
	- name: color
	list: int64
	- name: vehicle_traj
	list:
	- name: start
	struct:
	- name: object_id
	dtype: string
	- name: status
	dtype: string
	- name: guid
	dtype: string
	- name: aabb
	struct:
	- name: center
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	- name: extent
	list: float64
	- name: obb
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: rotation
	list: float64
	- name: bounds
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: location
	list: float64
	- name: rotation
	list: float64
	- name: scale
	list: int64
	- name: color
	list: int64
	- name: end
	struct:
	- name: object_id
	dtype: string
	- name: status
	dtype: string
	- name: guid
	dtype: string
	- name: aabb
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: obb
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: rotation
	list: float64
	- name: bounds
	struct:
	- name: center
	list: float64
	- name: extent
	list: float64
	- name: location
	list: float64
	- name: rotation
	list: float64
	- name: scale
	list: int64
	- name: color
	list: int64
	splits:
	- name: all
	num_bytes: 190650
	num_examples: 1
	download_size: 226585
	dataset_size: 190650
	configs:
	- config_name: default
	data_files:
	- split: all
	path: data/all-*
	---

	# LychSim Scenes Dataset

	[Project Page](https://lychsim.github.io/) \| [Paper](https://huggingface.co/papers/2605.12449) \| [GitHub](https://github.com/wufeim/LychSim)

	LychSim is a highly controllable and interactive simulation framework built upon Unreal Engine 5 for vision research. This dataset contains scene-level procedural rules for the simulator.

	## Description

	For each scene, we capture structural priors — navigable floor spaces, road areas, pedestrian walks, and dynamic vehicle / pedestrian trajectories — as structured records keyed to the underlying placed actors. These spatial priors guide the procedural generation process, ensuring that newly synthesized layouts remain faithful to the original scene semantics.

	## Sample Usage

	You can load the dataset using the Hugging Face `datasets` library:

	```python
	from datasets import load_dataset

	scenes = load_dataset("wufeim/lychsim_scenes")
	```

	## Citation

	If you find our work useful for your research, please consider citing our work:

	```bibtex
	@article{ma2026lychsim,
	title={LychSim: A Controllable and Interactive Simulation Framework for Vision Research},
	author={Ma, Wufei and Wang, Chloe and Chen, Siyi and Peng, Jiawei and Li, Patrick and Yuille, Alan},
	journal={arXiv preprint arXiv:2605.12449},
	year={2026}
	}
	```

	## License

	This dataset is released under the Creative Commons Attribution 4.0 International license (CC BY 4.0).