README.md

---
library_name: transformers
tags:
- llama-factory
- yi-vl
- llava
license: other
language:
- zh
- en
pipeline_tag: visual-question-answering
---

This is the Huggingface version of [Yi-VL-34B](https://huggingface.co/01-ai/Yi-VL-34B) model.

You may use this model for fine-tuning in downstream tasks, we recommend using our efficient fine-tuning toolkit. https://github.com/hiyouga/LLaMA-Factory

- **Developed by:** [01-AI](https://www.01.ai/).
- **Language(s) (NLP):** Chinese/English
- **License:** [Yi Series Model License](https://huggingface.co/01-ai/Yi-VL-34B/blob/main/LICENSE)

Usage:

```python
import requests
from PIL import Image

import torch
from transformers import AutoProcessor, AutoModelForVision2Seq, LlavaConfig
import transformers
from torch import nn

class LlavaMultiModalProjectorYiVL(nn.Module):
    def __init__(self, config: "LlavaConfig"):
        super().__init__()
        self.linear_1 = nn.Linear(config.vision_config.hidden_size, config.text_config.hidden_size, bias=True)
        self.linear_2 = nn.LayerNorm(config.text_config.hidden_size, bias=True)
        self.linear_3 = nn.Linear(config.text_config.hidden_size, config.text_config.hidden_size, bias=True)
        self.linear_4 = nn.LayerNorm(config.text_config.hidden_size, bias=True)
        self.act = nn.GELU()

    def forward(self, image_features):
        hidden_states = self.linear_1(image_features)
        hidden_states = self.linear_2(hidden_states)
        hidden_states = self.act(hidden_states)
        hidden_states = self.linear_3(hidden_states)
        hidden_states = self.linear_4(hidden_states)
        return hidden_states
# Monkey patch of LlavaMultiModalProjector is mandatory
transformers.models.llava.modeling_llava.LlavaMultiModalProjector = LlavaMultiModalProjectorYiVL

model_id = "BUAADreamer/Yi-VL-34B-hf"

messages = [
  { "role": "user", "content": "<image>What's in the picture?" }
]
image_file = "http://images.cocodataset.org/val2017/000000039769.jpg"

model = AutoModelForVision2Seq.from_pretrained(
    model_id, 
    torch_dtype=torch.float16, 
    low_cpu_mem_usage=True, 
).to(0)
processor = AutoProcessor.from_pretrained(model_id)

text = [processor.tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=False)]
images = [Image.open(requests.get(image_file, stream=True).raw)]
inputs = processor(text=text, images=images, return_tensors='pt').to(0, torch.float16)

output = model.generate(**inputs, max_new_tokens=200)
output = processor.batch_decode(output, skip_special_tokens=True)
print(output.split("Assistant:")[-1].strip())
```

You could also alternatively launch a Web demo by using the CLI command in [LLaMA-Factory](https://github.com/hiyouga/LLaMA-Factory)

```bash
llamafactory-cli webchat \
--model_name_or_path BUAADreamer/Yi-VL-34B-hf \
--template yi_vl \
--visual_inputs
```