| --- |
| license: cc-by-nc-4.0 |
| pipeline_tag: video-text-to-text |
| --- |
| |
| # ST-Evidence-7B |
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| We propose **Evidence-Backed Video Question Answering** (E-VQA), a task where multimodal models are designed to jointly produce a semantic **textual answer** and associated spatiotemporal evidence. This evidence includes **temporal segments** and **dense, tracked object segmentation masklets**. A masklet is defined as a temporal sequence of object segmentation masks tracked over time. |
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| This model is presented in the paper [Evidence-Backed Video Question Answering](https://huggingface.co/papers/2607.11862) (ECCV 2026). |
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| ST-Evidence-7B was fine-tuned from UniPixel, which is built upon Qwen2.5-VL and SAM 2.1. UniPixel is a unified model designed to handle both video question answering and mask generation. |
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| This was released for research purposes only, in support of the academic paper *Evidence-Backed Video Question Answering*. |
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| ## Resources |
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| - **Repository:** [SalesforceAIResearch/EVQA](https://github.com/SalesforceAIResearch/EVQA) |
| - **Paper:** [Evidence-Backed Video Question Answering](https://huggingface.co/papers/2607.11862) |
| - **Benchmark (ST-Evidence):** [Salesforce/ST-Evidence-Bench](https://huggingface.co/datasets/Salesforce/ST-Evidence-Bench) |
| - **SFT Dataset (ST-Evidence-Instruct):** [Salesforce/ST-Evidence-Instruct](https://huggingface.co/datasets/Salesforce/ST-Evidence-Instruct) |
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| ## License |
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| CC-BY-NC 4.0 |
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| ## Citation |
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| If you find this work useful for your research, please cite our paper: |
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| ```bibtex |
| @inproceedings{wang2026evidence, |
| title={Evidence-Backed Video Question Answering}, |
| author={Wang, Shijie and Zhou, Honglu and Wang, Ziyang and Xu, Ran and Xiong, Caiming and Savarese, Silvio and Sun, Chen and Niebles, Juan Carlos}, |
| booktitle={European Conference on Computer Vision (ECCV)}, |
| year={2026} |
| } |
| ``` |
