Create README.md

README.md

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+# Out of Sight but Not Out of Mind: Hybrid Memory for Dynamic Video World Models
+
+<div align="center">
+  <a href="https://kj-chen666.github.io/Hybrid-Memory-in-Video-World-Models/"><img src="https://img.shields.io/badge/Project-Page-orange.svg?logo=googlehome" alt="Project Page"></a>
+  <a href="https://github.com/H-EmbodVis/HyDRA"><img src="https://img.shields.io/badge/GitHub-Repository-black?logo=github" alt="GitHub"></a>
+  <a href="https://arxiv.org/pdf/2603.25716"><img src="https://img.shields.io/badge/arXiv-Paper-b31b1b?logo=Arxiv" alt="arXiv"></a>
+</div>
+
+## HM-World
+
+`HM-World` is a dataset for hybrid memory in dynamic video world models. It provides video sequences, foreground masks, camera pose annotations, character pose annotations, event timestamps, and text captions for each sample.
+
+## Usage
+
+Merge the split archives and extract the dataset with:
+
+```bash
+cat HM-World_* | tar -xzvf -
+```
+
+## Dataset Structure
+
+```text
+HM-World/
+├── sample1/
+│   ├── cond.mp4
+│   ├── tgt.mp4
+│   ├── cond_mask.mp4
+│   ├── tgt_mask.mp4
+│   ├── camera.json
+│   ├── character.json
+│   └── check.json
+├── sample2/
+│   └── ...
+├── ...
+└── caption.txt
+```
+
+## File Description
+
+- `cond.mp4`: condition video.
+- `tgt.mp4`: target video.
+- `cond_mask.mp4`: foreground mask video for the condition video.
+- `tgt_mask.mp4`: foreground mask video for the target video.
+- `camera.json`: camera pose information.
+- `character.json`: character pose information.
+- `check.json`: timestamps that record when the subjects enters or leaves the frame.
+- `caption.txt`: captions for all samples in the dataset.
+
+