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README.md

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----
-license: cc-by-4.0
----
+---
+license: cc-by-4.0
+language:
+- en
+pretty_name: SceneTrans
+size_categories:
+- 10K<n<100K
+task_categories:
+- image-to-text
+- visual-question-answering
+- image-feature-extraction
+tags:
+- change-detection
+- scene-difference
+- spot-the-difference
+- synthetic
+- isaac-sim
+- image-pair
+- robotics
+---
+
+# SceneTrans
+
+**SceneTrans** is a synthetic dataset of paired indoor scene images (A/B pairs) for
+**scene change detection / "spot-the-difference"** research. Each pair shows the *same* scene
+before and after an object-level edit — an object being **added**, **moved**, **removed**, or
+left **unchanged** — together with a natural-language description and the corresponding action.
+
+All scenes are rendered with **NVIDIA Isaac Sim 5.1.0** from USD assets, and come with RGB, depth,
+and segmentation modalities plus ground-truth metadata about what changed.
+
+> 💻 Generation scripts, annotation notebooks, and full documentation are on GitHub:
+> **[ShenGroup/SceneTrans](https://github.com/ShenGroup/SceneTrans)**.
+
+## Example
+
+A snapshot of representative scenes and A/B pairs in the dataset:
+
+![Dataset overview](dataset.png)
+
+## Scenes
+
+The data is distributed as per-scene `.zip` archives (the number in each filename is the number of
+A/B pairs), spanning **8 indoor scenes** and roughly **14,605** pairs in total.
+
+| Archive | Scene | A/B pairs |
+| --- | --- | --- |
+| `kitchen_sim_2300.zip` | Kitchen | 2,300 |
+| `studyroom_desk_sim_2400.zip` | Study room – desk | 2,400 |
+| `bedroom1_bed_sim_2390.zip` | Bedroom – bed | 2,390 |
+| `livingroom_sim_1990.zip` | Living room | 1,990 |
+| `livingroom_shelf_sim_1925.zip` | Living room – shelf | 1,925 |
+| `childrenroom_desk_sim_1660.zip` | Children room – desk | 1,660 |
+| `diningroom_sim_1140.zip` | Dining room | 1,140 |
+| `bedroom1_shelf_sim_800.zip` | Bedroom – shelf | 800 |
+| `assets.zip` | USD scene/object assets (source environments) | – |
+
+## Change Types
+
+Every pair belongs to one of four object-level transformations:
+
+- **Add** — an object absent in frame A is present in frame B.
+- **Move** — an object is relocated (and possibly re-oriented) between the two frames.
+- **Remove** — an object present in frame A is absent in frame B.
+- **Unchanged** — both frames come from the same rendered state (a valid no-change sample).
+
+## License
+
+Released under the
+[Creative Commons Attribution 4.0 International License (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/).