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  1. .gitattributes +0 -1
  2. README.md +444 -0
  3. metadata/omniworld_game_metadata.csv +57 -0
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README.md ADDED
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+ ---
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+ license: cc-by-nc-sa-4.0
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+ size_categories:
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+ - n>1T
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+ task_categories:
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+ - text-to-video
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+ - image-to-video
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+ - image-to-3d
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+ - robotics
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+ - other
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+ language:
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+ - en
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+ pretty_name: OmniWorld
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+ ---
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+
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+ <h1 align='center'>OmniWorld: A Multi-Domain and Multi-Modal Dataset for 4D World Modeling</h1>
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+ <div align='center'>
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+ <a href='https://github.com/yangzhou24' target='_blank'>Yang Zhou</a><sup>1</sup> 
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+ <a href='https://github.com/yyfz' target='_blank'>Yifan Wang</a><sup>1</sup> 
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+ <a href='https://zhoutimemachine.github.io' target='_blank'>Jianjun Zhou</a><sup>1,2</sup> 
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+ <a href='https://github.com/AmberHeart' target='_blank'>Wenzheng Chang</a><sup>1</sup> 
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+ <a href='https://github.com/ghy0324' target='_blank'>Haoyu Guo</a><sup>1</sup> 
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+ <a href='https://github.com/LiZizun' target='_blank'>Zizun Li</a><sup>1</sup> 
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+ <a href='https://kaijing.space/' target='_blank'>Kaijing Ma</a><sup>1</sup> 
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+
26
+ </div>
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+ <div align='center'>
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+ <a href='https://scholar.google.com/citations?user=VuTRUg8AAAAJ' target='_blank'>Xinyue Li</a><sup>1</sup> 
29
+ <a href='https://scholar.google.com/citations?user=5SuBWh0AAAAJ&hl=en' target='_blank'>Yating Wang</a><sup>1</sup> 
30
+ <a href='https://www.haoyizhu.site/' target='_blank'>Haoyi Zhu</a><sup>1</sup> 
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+ <a href='https://mingyulau.github.io/' target='_blank'>Mingyu Liu</a><sup>1,2</sup> 
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+ <a href='https://scholar.google.com/citations?user=FbSpETgAAAAJ' target='_blank'>Dingning Liu</a><sup>1</sup>
33
+ <a href='https://yangjiangeyjg.github.io/' target='_blank'>Jiange Yang</a><sup>1</sup>
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+ <a href='https://github.com/Kr1sJFU' target='_blank'>Zhoujie Fu</a><sup>1</sup> 
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+
36
+ </div>
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+ <div align='center'>
38
+ <a href='https://sotamak1r.github.io/' target='_blank'>Junyi Chen</a><sup>1</sup> 
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+ <a href='https://cshen.github.io' target='_blank'>Chunhua Shen</a><sup>1,2</sup> 
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+ <a href='https://oceanpang.github.io' target='_blank'>Jiangmiao Pang</a><sup>1</sup> 
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+ <a href='https://kpzhang93.github.io/' target='_blank'>Kaipeng Zhang</a><sup>1</sup>
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+ <a href='https://tonghe90.github.io/' target='_blank'>Tong He</a><sup>1†</sup>
43
+ </div>
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+ <div align='center'>
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+ <sup>1</sup>Shanghai AI Lab  <sup>2</sup>ZJU 
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+ </div>
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+ <br>
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+ <div align="center">
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+ <a href="https://yangzhou24.github.io/OmniWorld/"><img src="https://img.shields.io/badge/Project Page-5745BB?logo=google-chrome&logoColor=white"></a>  
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+ <a href="https://arxiv.org/abs/2509.12201"><img src="https://img.shields.io/static/v1?label=Paper&message=Arxiv&color=red&logo=arxiv"></a>  
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+ <a href="https://github.com/yangzhou24/OmniWorld"><img src="https://img.shields.io/static/v1?label=Code&message=Github&color=blue&logo=github"></a>  
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+ <a href="https://huggingface.co/datasets/InternRobotics/OmniWorld"><img src="https://img.shields.io/static/v1?label=Dataset&message=HuggingFace&color=yellow&logo=huggingface"></a>  
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+ </div>
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+
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+
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+ # 🎉NEWS
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+ - [2025.9.16] 🔥 The first **1.2k splits** of **OmniWorld-Game** is now live on Hugging Face! **We will continue to update, more data is coming soon, Stay tuned!**
58
+
59
+ # Directory Structure
60
+ ```
61
+ DATA_PATH/
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+ ├─ annotations/
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+ │ ├─ OmniWorld-Game/
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+ │ │ ├─ b04f88d1f85a/
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+ │ │ ├─ 52e80f590716/
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+ │ │ └─ … # one folder per scene
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+ │ ├─ OmniWorld-DROID/
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+ │ └─ …
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+ ├─ metadata/
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+ │ ├─ OmniWorld-Game_metadata.csv
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+ │ ├─ OmniWorld-DROID_metadata.csv
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+ │ └─ …
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+ ├─ videos/
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+ │ ├─ OmniWorld-Game/
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+ │ │ ├─ b04f88d1f85a/
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+ │ │ ├─ 52e80f590716/
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+ │ │ └─ …
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+ │ ├─ OmniWorld-DROID/
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+ │ └─ …
80
+ └─ README.md # this guide
81
+ ```
82
+
83
+
84
+ # Dataset Download
85
+ You can download the entire OmniWorld dataset using the following command:
86
+ ```bash
87
+ # 1. Install (if you haven't yet)
88
+ pip install --upgrade "huggingface_hub[cli]"
89
+
90
+ # 2. Full download
91
+ hf download InternRobotics/OmniWorld \
92
+ --repo-type dataset \
93
+ --local-dir /path/to/DATA_PATH
94
+ ```
95
+ For downloading specific files (instead of the full dataset), please refer to the [dowanload_specific.py](https://github.com/yangzhou24/OmniWorld/blob/main/scripts/dowanload_specific.py) provided in our GitHub repository.
96
+
97
+ ## OmniWorld-Game Organisation
98
+
99
+ To keep the download manageable, each scene is split into multiple `.tar.gz` files:
100
+
101
+ - RGB / Depth / Flow : ≤ 2 000 images per `.tar.gz`. The naming convention follows the format: `…/<scene_id>_<modality>_<part_idx>.tar.gz`
102
+
103
+ - Other Annotations: Additional data such as camera poses, masks, and text annotations are grouped together in a single file per scene: `…/<scene_id>_others.tar.gz`
104
+
105
+ # Usage Guide
106
+ ## OmniWorld-Game
107
+ ### 1. Quick-Start: Extracting One Scene
108
+ Below we extract RGB frames and all annotations for scene `<scene_id>` to a local folder of the same name.
109
+ ```bash
110
+ scene_id=b04f88d1f85a
111
+ root=/path/to/DATA_PATH # where you store OmniWorld
112
+
113
+ mkdir -p ${scene_id}
114
+
115
+ # --- RGB (may span several parts) ------------------------------------------
116
+ for rgb_tar in ${root}/videos/OmniWorld-Game/${scene_id}/${scene_id}_rgb_*.tar.gz
117
+ do
118
+ echo "Extracting $(basename $rgb_tar)…"
119
+ tar -xzf "$rgb_tar" -C ${scene_id}
120
+ done
121
+
122
+ # --- Depth -----------------------------------------------------------------
123
+ for d_tar in ${root}/annotations/OmniWorld-Game/${scene_id}/${scene_id}_depth_*.tar.gz
124
+ do
125
+ echo "Extracting $(basename $d_tar)…"
126
+ tar -xzf "$d_tar" -C ${scene_id}
127
+ done
128
+
129
+ # --- Flow ------------------------------------------------------------------
130
+ for f_tar in ${root}/annotations/OmniWorld-Game/${scene_id}/${scene_id}_flow_*.tar.gz
131
+ do
132
+ echo "Extracting $(basename $f_tar)…"
133
+ tar -xzf "$f_tar" -C ${scene_id}
134
+ done
135
+
136
+ # --- All other annotations --------------------------------------
137
+ tar -xzf ${root}/annotations/OmniWorld-Game/${scene_id}/${scene_id}_others.tar.gz -C ${scene_id}
138
+ ```
139
+ Resulting Scene Folder:
140
+ ```
141
+ b04f88d1f85a/
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+ ├─ color/ # RGB frames (.png)
143
+ ├─ depth/ # 16-bit depth maps
144
+ ├─ flow/ # flow_u_16.png / flow_v_16.png / flow_vis.png
145
+ ├─ camera/ # split_*.json (intrinsics + extrinsics)
146
+ ├─ subject_masks/ # foreground masks (per split)
147
+ ├─ gdino_mask/ # dynamic-object masks (per frame)
148
+ ├─ text/ # structured captions (81-frame segments)
149
+ ├─ droidclib/ # coarse camera poses (if you need them)
150
+ ├─ fps.txt # source video framerate
151
+ └─ split_info.json # how frames are grouped into splits
152
+ ```
153
+
154
+ ### 2. Detailed Explanation
155
+
156
+ #### 1. Split Information (`split_info.json`)
157
+
158
+ Each scene is divided into several high-quality "splits". `split_info.json` tells you how the original video indices are grouped.
159
+
160
+ ```
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+ {
162
+ "scene_name": "b04f88d1f85a",
163
+ "split_num": 6,
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+ "split": [
165
+ [0, 1, 2, ...], // split_0
166
+ [316, 317, ...], // split_1
167
+ ...
168
+ ]
169
+ }
170
+ ```
171
+ Meaning:
172
+
173
+ - `split_num` – total number of splits in this scene.
174
+ - `split[i]` – an array with the original frame indices belonging to `split i`.
175
+ #### 2. Camera Poses (`camera/split_<idx>.json`)
176
+
177
+ For every split you will find a file
178
+ ```
179
+ <scene_name>/camera/split_<idx>.json (e.g. split_0.json)
180
+ ```
181
+ containing:
182
+ - `focals` – focal length in pixels (same for x and y).
183
+ - `cx, cy` – principal point.
184
+ - `quats` – per-frame rotation as quaternions (w, x, y, z).
185
+ - `trans` – per-frame translation (x, y, z).
186
+
187
+ **Minimal Reader**
188
+
189
+ ```python
190
+ import json
191
+ from pathlib import Path
192
+
193
+ import numpy as np
194
+ from scipy.spatial.transform import Rotation as R
195
+
196
+
197
+ def load_split_info(scene_dir: Path):
198
+ """Return the split json dict."""
199
+ with open(scene_dir / "split_info.json", "r", encoding="utf-8") as f:
200
+ return json.load(f)
201
+
202
+
203
+ def load_camera_poses(scene_dir: Path, split_idx: int):
204
+ """
205
+ Returns
206
+ -------
207
+ intrinsics : (S, 3, 3) array, pixel-space K matrices
208
+ extrinsics : (S, 4, 4) array, OpenCV world-to-camera matrices
209
+ """
210
+ # ----- read metadata -----------------------------------------------------
211
+ split_info = load_split_info(scene_dir)
212
+ frame_count = len(split_info["split"][split_idx])
213
+
214
+ cam_file = scene_dir / "camera" / f"split_{split_idx}.json"
215
+ with open(cam_file, "r", encoding="utf-8") as f:
216
+ cam = json.load(f)
217
+
218
+ # ----- intrinsics --------------------------------------------------------
219
+ intrinsics = np.repeat(np.eye(3)[None, ...], frame_count, axis=0)
220
+ intrinsics[:, 0, 0] = cam["focals"] # fx
221
+ intrinsics[:, 1, 1] = cam["focals"] # fy
222
+ intrinsics[:, 0, 2] = cam["cx"] # cx
223
+ intrinsics[:, 1, 2] = cam["cy"] # cy
224
+
225
+ # ----- extrinsics --------------------------------------------------------
226
+ extrinsics = np.repeat(np.eye(4)[None, ...], frame_count, axis=0)
227
+
228
+ # SciPy expects quaternions as (x, y, z, w) → convert
229
+ quat_wxyz = np.array(cam["quats"]) # (S, 4) (w,x,y,z)
230
+ quat_xyzw = np.concatenate([quat_wxyz[:, 1:], quat_wxyz[:, :1]], axis=1)
231
+
232
+ rotations = R.from_quat(quat_xyzw).as_matrix() # (S, 3, 3)
233
+ translations = np.array(cam["trans"]) # (S, 3)
234
+
235
+ extrinsics[:, :3, :3] = rotations
236
+ extrinsics[:, :3, 3] = translations
237
+
238
+ return intrinsics.astype(np.float32), extrinsics.astype(np.float32)
239
+
240
+
241
+ # --------------------------- example usage -----------------------------------
242
+ if __name__ == "__main__":
243
+ scene = Path("b04f88d1f85a") # adjust to your path
244
+ K, w2c = load_camera_poses(scene, split_idx=0) # world-to-camera transform in OpenCV format
245
+ print("Intrinsics shape:", K.shape)
246
+ print("Extrinsics shape:", w2c.shape)
247
+ ```
248
+
249
+ #### 3. Depth (`depth/<frame_idx>.png`)
250
+
251
+ - 16-bit PNG, one file per RGB frame.
252
+ - Values are stored as unsigned integers in [0, 65535].
253
+
254
+ &ensp;&ensp;&ensp;`0 … 100`  ≈ invalid / too close
255
+
256
+ &ensp;&ensp;&ensp;`65500 … 65535` ≈ sky / too far
257
+
258
+ **Minimal Reader**
259
+
260
+ ```python
261
+ import imageio.v2 as iio
262
+ import numpy as np
263
+ from pathlib import Path
264
+
265
+
266
+ def load_depth(depthpath):
267
+ """
268
+ Returns
269
+ -------
270
+ depthmap : (H, W) float32
271
+ valid : (H, W) bool True for reliable pixels
272
+ """
273
+
274
+ depthmap = imageio.v2.imread(depthpath).astype(np.float32) / 65535.0
275
+ near_mask = depthmap < 0.0015 # 1. too close
276
+ far_mask = depthmap > (65500.0 / 65535.0) # 2. filter sky
277
+ # far_mask = depthmap > np.percentile(depthmap[~far_mask], 95) # 3. filter far area (optional)
278
+ near, far = 1., 1000.
279
+ depthmap = depthmap / (far - depthmap * (far - near)) / 0.004
280
+
281
+ valid = ~(near_mask | far_mask)
282
+ depthmap[~valid] = -1
283
+
284
+ return depthmap, valid
285
+
286
+ # ---------------------------- example ---------------------------------------
287
+ if __name__ == "__main__":
288
+ d, mask = load_depth("b04f88d1f85a/depth/000000.png")
289
+ print("Depth shape:", d.shape, "valid pixels:", mask.mean() * 100, "%")
290
+
291
+ ```
292
+ Feel free to tighten the `far_mask` with `np.percentile(depthmap[~far_mask], 95)` if you need a stricter “too-far” criterion.
293
+
294
+ > We provide a script to generate a fused point cloud from camera poses and depth maps. Instructions can be found in the [Point Cloud Visualization](https://github.com/yangzhou24/OmniWorld?tab=readme-ov-file#-visualize-as-point-cloud) section from our github repository.
295
+
296
+ #### 4. Structured Caption (`text/<start_idx>_<end_idx>.json`)
297
+
298
+ From every split we sample `81` frames and attach rich, structured captions.
299
+
300
+ The general naming format of the text file is `<start_idx>_<end_idx>.json`, which means that the text is the description of the `start_idx` frame to the `end_idx` frame of the global video.
301
+
302
+ Each text file contains the following description information
303
+ - `Short_Caption`: A brief summary (1–2 sentences).
304
+ - `PC_Caption`: Actions and status of the player-character.
305
+ - `Background_Caption`: Fine-grained spatial description of the scene.
306
+ - `Camera_Caption`: How the camera moves, such as zooms, rotates.
307
+ - `Video_Caption`: ≈200-word dense paragraph combining all above..
308
+ - `Key_Tags`: string of tags that combines key features.
309
+
310
+ #### 5. Foreground Masks (`subject_masks/split_<idx>.json`)
311
+ Binary masks (white = subject, black = background) for every frame in a split. Main masked object includes:
312
+
313
+ - `Human/Robotics` scenes: the active arm / robot.
314
+ - `Game` scenes: the playable character or vehicle.
315
+
316
+ **Minimal Reader**
317
+ ```python
318
+ import json
319
+ from pathlib import Path
320
+ from pycocotools import mask as mask_utils
321
+ import numpy as np
322
+
323
+ def load_subject_masks(scene_dir: Path, split_idx: int):
324
+ """
325
+ Returns
326
+ -------
327
+ masks : list[np.ndarray] (H, W) bool
328
+ """
329
+ seg_mask_list = []
330
+ segmask_path = scene_dir / "subject_masks" / f"split_{split_idx}.json"
331
+ with open(segmask_path, "r", encoding="utf-8") as f:
332
+ seg_masks = json.load(f)
333
+ for key in seg_masks.keys():
334
+ seg_mask = seg_masks[key]
335
+ seg_mask = mask_utils.decode(seg_mask["mask_rle"])
336
+ seg_mask_list.append(seg_mask)
337
+
338
+ seg_mask_list
339
+
340
+ # ---------------------------- example ---------------------------------------
341
+ if __name__ == "__main__":
342
+ masks = load_subject_masks(Path("b04f88d1f85a"), split_idx=0)
343
+ print("Loaded", len(masks), "masks of shape", masks[0].shape)
344
+ ```
345
+ We also release per-frame Dynamic Masks (`gdino_mask/<frame_idx>.png`). Each RGB image in the original video is labeled with dynamic objects (such as cars, people, and animals). White represents dynamic objects, and black represents static backgrounds. This can be used in conjunction with Foreground Masks as needed.
346
+
347
+
348
+ #### 6. Optical Flow (`flow/<frame_idx>/...`)
349
+
350
+ For every RGB frame `t` we provide dense forward optical flow that points to frame `t + 1`.
351
+
352
+ Directory layout (example for frame 0 of scene `b04f88d1f85a`)
353
+ ```
354
+ b04f88d1f85a/
355
+ └─ flow/
356
+ └─ 00000/
357
+ ├─ flow_u_16.png # horizontal component (u, Δx)
358
+ ├─ flow_v_16.png # vertical component (v, Δy)
359
+ └─ flow_vis.png # ready-made RGB visualisation (for inspection only)
360
+ ```
361
+ **Minimal Reader**
362
+ ```python
363
+ import numpy as np
364
+ import imageio.v2 as iio
365
+ from pathlib import Path
366
+
367
+ FLOW_MIN, FLOW_MAX = -300.0, 300.0 # change if you override the range
368
+
369
+ def flow_decompress(u, v, flow_min=-FLOW_MIN, flow_max=FLOW_MAX):
370
+ """
371
+ Read uint16 image and convert back to optical flow data
372
+
373
+ Args:
374
+ u: np.array (np.uint16) - Optical flow horizontal component
375
+ v: np.array (np.uint16) - Optical flow vertical component
376
+ flow_min: float - Assumed minimum value of optical flow
377
+ flow_max: float - Assumed maximum value of optical flow
378
+
379
+ Returns:
380
+ np.array (np.float32) - Optical flow data with shape (H,W,2)
381
+ """
382
+ u = u.astype(np.uint16)
383
+ v = v.astype(np.uint16)
384
+
385
+ u = u / 65535.0
386
+ v = v / 65535.0
387
+
388
+ u = u * (flow_max - flow_min) + flow_min
389
+ v = v * (flow_max - flow_min) + flow_min
390
+
391
+ res = np.stack((u, v), axis=-1)
392
+
393
+ return res.astype(np.float32)
394
+
395
+ def load_flow(flowpath):
396
+ of_u_path = os.path.join(flowpath, "flow_u_16.png")
397
+ of_v_path = os.path.join(flowpath, "flow_v_16.png")
398
+
399
+ u = cv2.imread(str(of_u_path)).astype(np.uint16)
400
+ v = cv2.imread(str(of_v_path)).astype(np.uint16)
401
+ flow = flow_decompress(u, v)
402
+
403
+ return flow
404
+
405
+ # ---------------------------- example ---------------------------------------
406
+ if __name__ == "__main__":
407
+ flow = load_flow("b04f88d1f85a/flow/00000")
408
+ print("Flow shape: ", flow.shape)
409
+ ```
410
+
411
+
412
+ # License
413
+ The OmniWorld dataset is released under the **Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0)**. By accessing or using this dataset, you agree to be bound by the terms and conditions outlined in this license, as well as the specific provisions detailed below.
414
+
415
+ - **Special Note on Third-Party Content**:
416
+ A portion of this dataset is derived from third-party game content. All intellectual property rights pertaining to these original game assets (including, but not limited to, RGB and depth images) remain with their respective original game developers and publishers.
417
+
418
+ - **Permitted Uses**:
419
+ You are hereby granted permission, free of charge, to use, reproduce, and share the OmniWorld dataset and any adaptations thereof, solely for non-commercial research and educational purposes. This includes, but is not limited to: academic publications, algorithm benchmarking, reproduction of scientific results.
420
+
421
+ Under this license, you are expressly **forbidden** from:
422
+
423
+ - Using the dataset, in whole or in part, for any commercial purpose, including but not limited to its incorporation into commercial products, services, or monetized applications.
424
+
425
+ - Redistributing the original third-party game assets contained within the dataset outside the scope of legitimate research sharing.
426
+ Removing or altering any copyright, license, or attribution notices.
427
+
428
+ The authors of the OmniWorld dataset provide this dataset "as is" and make no representations or warranties regarding the legality of the underlying data for any specific purpose. Users are solely responsible for ensuring that their use of the dataset complies with all applicable laws and the terms of service or license agreements of the original game publishers (sources of third-party content).
429
+
430
+ For the full legal text of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, please visit: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.
431
+
432
+ # Citation
433
+ If you found this dataset useful, please cite our paper
434
+ ```bibtex
435
+ @misc{zhou2025omniworld,
436
+ title={OmniWorld: A Multi-Domain and Multi-Modal Dataset for 4D World Modeling},
437
+ author={Yang Zhou and Yifan Wang and Jianjun Zhou and Wenzheng Chang and Haoyu Guo and Zizun Li and Kaijing Ma and Xinyue Li and Yating Wang and Haoyi Zhu and Mingyu Liu and Dingning Liu and Jiange Yang and Zhoujie Fu and Junyi Chen and Chunhua Shen and Jiangmiao Pang and Kaipeng Zhang and Tong He},
438
+ year={2025},
439
+ eprint={2509.12201},
440
+ archivePrefix={arXiv},
441
+ primaryClass={cs.CV},
442
+ url={https://arxiv.org/abs/2509.12201},
443
+ }
444
+ ```
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