# LISA: Reasoning Segmentation via Large Language Model

<font size=10><div align='center'><b>LISA</b>: Large <b>L</b>anguage <b>I</b>nstructed <b>S</b>egmentation <b>A</b>ssistant</div></font>

<font size=10><div align='center' > <a href=https://arxiv.org/abs/2308.00692>Paper</a> | <a href=https://huggingface.co/xinlai/LISA-13B-llama2-v0>Model</a> | <a href="#Inference">Inference</a> | <a>Demo (Comming Soon)</a> </div></font>


<p align="center"> <img src="imgs/fig_overview.png" width="100%"> </p>

<p align="center"> <img src="imgs/teaser.png" width="100%"> </p>

## News
- [x] [2023.8.3] Inference code and the [LISA-13B-llama2-v0](https://huggingface.co/xinlai/LISA-13B-llama2-v0) model are released. Welcome to check out!
- [x] [2023.8.2] Paper is released and GitHub repo is created.

## TODO 
- [ ] Hugging Face Demo
- [ ] ReasonSeg Dataset Release
- [ ] Training Code Release

**LISA: Reasoning Segmentation Via Large Language Model [[Paper](https://arxiv.org/pdf/2308.00692.pdf)]** <br />
[Xin Lai](https://scholar.google.com/citations?user=tqNDPA4AAAAJ&hl=zh-CN),
[Zhuotao Tian](https://scholar.google.com/citations?user=mEjhz-IAAAAJ&hl=en),
[Yukang Chen](https://scholar.google.com/citations?user=6p0ygKUAAAAJ&hl=en),
[Yanwei Li](https://scholar.google.com/citations?user=I-UCPPcAAAAJ&hl=zh-CN),
[Yuhui Yuan](https://scholar.google.com/citations?user=PzyvzksAAAAJ&hl=en),
[Shu Liu](https://scholar.google.com.hk/citations?user=BUEDUFkAAAAJ&hl=zh-CN),
[Jiaya Jia](https://scholar.google.com/citations?user=XPAkzTEAAAAJ&hl=en)<br />

## Abstract
In this work, we propose a new segmentation task --- ***reasoning segmentation***. The task is designed to output a segmentation mask given a complex and implicit query text. We establish a benchmark comprising over one thousand image-instruction pairs, incorporating intricate reasoning and world knowledge for evaluation purposes. Finally, we present LISA: Large-language Instructed Segmentation Assistant, which inherits the language generation capabilities of the multi-modal Large Language Model (LLM) while also possessing the ability to produce segmentation masks.
For more details, please refer to:

## Highlights
**LISA** unlocks the new segmentation capabilities of multi-modal LLMs, and can handle cases involving: 
1. complex reasoning; 
2. world knowledge; 
3. explanatory answers; 
4. multi-turn conversation. 

**LISA** also demonstrates robust zero-shot capability when trained exclusively on reasoning-free datasets. In addition, fine-tuning the model with merely 239 reasoning segmentation image-instruction pairs results in further performance enhancement.

## Experimental results
<p align="center"> <img src="imgs/Table1.png" width="80%"> </p>

## Installation
```
pip install -r requirements.txt
```

## Inference
To chat with [LISA-13B-llama2-v0](https://huggingface.co/xinlai/LISA-13B-llama2-v0): (Note that the model currently does not support explanatory answers.)
```
CUDA_VISIBLE_DEVICES=0 python3 chat.py --version='xinlai/LISA-13B-llama2-v0'
```
To use `bfloat16` data type for inference:
```
CUDA_VISIBLE_DEVICES=0 python3 chat.py --version='xinlai/LISA-13B-llama2-v0' --precision='bf16'
```

After that, input the text prompt and then the image path. For example，
```
- Please input your prompt: Where can the driver see the car speed in this image? Please output segmentation mask.
- Please input the image path: imgs/example1.jpg

- Please input your prompt: Can you segment the food that tastes spicy and hot?
- Please input the image path: imgs/example2.jpg
```
The results should be like:
<p align="center"> <img src="imgs/example1.jpg" width="22%"> <img src="vis_output/example1_masked_img_0.jpg" width="22%"> <img src="imgs/example2.jpg" width="25%"> <img src="vis_output/example2_masked_img_0.jpg" width="25%"> </p>


## Citation 
If you find this project useful in your research, please consider citing:

```
@article{reason-seg,
  title={LISA: Reasoning Segmentation Via Large Language Model},
  author={Xin Lai and Zhuotao Tian and Yukang Chen and Yanwei Li and Yuhui Yuan and Shu Liu and Jiaya Jia},
  journal={arXiv:2308.00692},
  year={2023}
}

```

## Acknowledgement
-  This work is built upon the [LLaMA](https://github.com/facebookresearch/llama), [SAM](https://github.com/facebookresearch/segment-anything), and [LLaVA](https://github.com/haotian-liu/LLaVA).