YiminJimmy/SARLANG-1M

SARLANG-1M

SARLANG-1M is a large-scale benchmark tailored for multimodal SAR image understanding, with a primary focus on integrating SAR with textual modality. SARLANG-1M comprises more than 1 million high-quality SAR image-text pairs collected from over 59 cities worldwide. It features hierarchical resolutions (ranging from 0.1 to 25 meters), fine-grained semantic descriptions (including both concise and detailed captions), diverse remote sensing categories (1,696 object types and 16 land cover classes), and multi-task question-answering pairs spanning seven applications and 1,012 question types.

SARLANG-1M dataset supports seven SAR applications:

Application	Application Description	Text Numuber
Image Description	Describe the SAR image	45,650
Object Identification	Determine the presence of specific objects	484,620
Object Classification	Identify the predominant category within the SAR image	132,525
Instance Counting	Quantify instances within the SAR image	117,382
Region Referring	Determine the category present in the specific location	221,450
Object Positioning	Determines the approximate location of a category	106,171
Others	Predict the object shape, direction, reasoning etc	18,479

The Statistics of Text Annotations in SARLANG-1M dataset:

The image shows the distribution of seven applications provided in the SARLANG-1M benchmark (a), the numbers of each question type in the 'others' application (b), and the distribution of the 30 most frequent object categories (c).

Some Representative SAR VQA Labels

There are 30 question-answering pairs and corresponding SAR images provided in the Examples.zip file. The entire SARLANG-1M dataset is coming soon!

Processed SAR Images in Our SARLANG-1M Dataset

The SAR images provided in our SARLANG-1M dataset come from four sub-datasets:

• SpaceNet6, DFC2023, OpenEarthMap-SAR: The original SAR images(tif format) and the preprocessed SAR images(png format) are saved in the SARimages_original.zip file and the SARimages_preprocessed.zip file, respectively. Notably, SAR image preprocessing is an optional strategy to improve the performance of VLMs by significantly enhancing image clarity and effectively highlighting key objects within the SAR images. You can choose any version according to your needs.
• SARDet-100K: The SAR images in this dataset has been preprocessed and denoised. Original SAR images are directly collected in our SARLANG-1M dataset without any preprocessing operations. The images can be directly download from the official link of SARDet_100K.

🤝Acknowledgments

The authors would also like to give special thanks to SARDet_100K, SpaceNet6, DFC2023 and OpenEarthMap-SAR for providing the valuable SAR Images.

Contact

[email protected], YIMIN WEI, The University of Tokyo