| --- |
| license: gpl-3.0 |
| task_categories: |
| - image-segmentation |
| tags: |
| - semantic-segmentation |
| - synthetic-data |
| - domain-adaptation |
| - cityscapes |
| - acdc |
| size_categories: |
| - 100K<n<1M |
| --- |
| |
| ## Dataset Summary |
| This dataset contains generated images for semantic segmentation targeting the **Cityscapes** and **ACDC** domains. The images are produced from five source datasets using the method described in: [A Framework for Low-Effort Training Data Generation for Urban Semantic Segmentation](https://arxiv.org/abs/2510.11567). |
|
|
| ## Technical Specifications |
| * **Subset Selection:** To preserve storage space, we release the **top 3 generated images** per original source image, selected based on our proposed **MCOC score**. |
| * **Label Mapping:** All masks follow the standard **Cityscapes 19-class format**. |
| * **Resolution:** 512 x 1024 (Height x Width). |
| * **Format:** Images and masks are provided in `.png` format. |
|
|
| --- |
|
|
| ## Dataset Statistics |
| The following table reflects the number of source images used to generate the target domain data. |
|
|
| | Source Domain | Image Count | Status | |
| | :--- | :--- | :--- | |
| | **GTA** | 24,966 | Available | |
| | **UrbanSyn** | 7,539 | Available | |
| | **VEIS** | 3,018 | Available | |
| | **SHIFT** | 3,000 | Available | |
| | **Synscapes** | 0 | Restricted | |
|
|
| > **Note on Synscapes:** Due to licensing restrictions, we are unable to release the generated Synscapes data. The folders contain the original license file for reference but do not include image data. |
|
|
| --- |
|
|
| ## Dataset Structure |
| The data is organized by `<Target_Domain>/<Source_Domain>/`. |
|
|
| ```text |
| <Target_Domain>/ |
| └── <Source_Domain>/ |
| ├── images/ # Top 3 generated images per source (MCOC ranked) |
| ├── original_tid/ # Original source segmentation maps |
| ├── hrda_tid/ # HRDA pseudo-labels |
| ├── splits/ # .txt files for training loading |
| └── LICENSE # Original source dataset license |
| ``` |
|
|
| --- |
|
|
| ## Usage Example |
| Example data loading scripts that utilize the provided .txt split files are available in our official GitHub repository: [github.com/vislearn/FLEDGE](https://github.com/vislearn/FLEDGE) |
|
|
| --- |
|
|
| ## Citation |
|
|
| ```text |
| @misc{kalsan2025fledge, |
| title={A Framework for Low-Effort Training Data Generation for Urban Semantic Segmentation}, |
| author={Damjan Kalšan and Denis Zavadski and Tim Küchler and Haebom Lee and Stefan Roth and Carsten Rother}, |
| year={2025}, |
| eprint={2510.11567}, |
| archivePrefix={arXiv}, |
| primaryClass={cs.CV} |
| } |
| ``` |
