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+# DeltaVLM
+
+This repository hosts the pretrained DeltaVLM checkpoint from the paper [DeltaVLM: Interactive Remote Sensing Image Change Analysis via Instruction-guided Difference Perception](https://arxiv.org/abs/2507.22346).
+
+## Contents
+
+- `checkpoint_best.pth`: pretrained DeltaVLM checkpoint
+- `configs/evaluate.yaml`: example evaluation config used in the project codebase
+
+## Important note
+
+This checkpoint does **not** include the frozen base LLM weights. The original project loads a Vicuna-7B-v1.5-compatible model separately and then applies the DeltaVLM checkpoint on top.
+
+In the local reproduction environment, the Vicuna path was substituted with a compatible `llavav1.5-7b` directory for loading.
+
+## Code and dataset
+
+- Code: https://github.com/hanlinwu/DeltaVLM
+- Dataset annotations: https://huggingface.co/datasets/hlwu/changechat-105k
+- Image source: https://github.com/Chen-Yang-Liu/LEVIR-CC-Dataset
+
+## Example
+
+After cloning the code repo and preparing the required base model plus dataset files, evaluation can be run with:
+
+```bash
+python infer_subtasks.py --cfg_path configs/evaluate.yaml --n_samples 2
+```
+
+## License
+
+Please follow the license terms of this project repository, the referenced dataset, and the required upstream base model.