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Model: llava-hf/llava-v1.6-vicuna-7b-hf Source: Original Platform
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README.md
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README.md
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---
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tags:
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- vision
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- image-text-to-text
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license: llama2
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language:
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- en
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pipeline_tag: image-text-to-text
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---
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# LLaVa-Next, leveraging [liuhaotian/llava-v1.6-vicuna-7b](https://huggingface.co/liuhaotian/llava-v1.6-vicuna-7b) as LLM
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The LLaVA-NeXT model was proposed in [LLaVA-NeXT: Improved reasoning, OCR, and world knowledge](https://llava-vl.github.io/blog/2024-01-30-llava-next/) by Haotian Liu, Chunyuan Li, Yuheng Li, Bo Li, Yuanhan Zhang, Sheng Shen, Yong Jae Lee. LLaVa-NeXT (also called LLaVa-1.6) improves upon [LLaVa-1.5](https://huggingface.co/transformers/main/model_doc/llava.html) by increasing the input image resolution and training on an improved visual instruction tuning dataset to improve OCR and common sense reasoning.
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Disclaimer: The team releasing LLaVa-NeXT did not write a model card for this model so this model card has been written by the Hugging Face team.
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## Model description
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LLaVa combines a pre-trained large language model with a pre-trained vision encoder for multimodal chatbot use cases. LLaVA 1.6 improves on LLaVA 1.5 BY:
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- More diverse and high quality data mixture
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- Dynamic high resolution
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## Intended uses & limitations
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You can use the raw model for tasks like image captioning, visual question answering, multimodal chatbot use cases. See the [model hub](https://huggingface.co/models?search=llava-hf) to look for
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other versions on a task that interests you.
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### How to use
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Here's the prompt template for this model but we recommend to use chat templates to format the prompt with `processor.apply_chat_template()`.
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That will apply the correct template for a given checkpoint for you.
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```
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"A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions. USER: <image>\nWhat is shown in this image? ASSISTANT:"
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```
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To run the model with the `pipeline`, see the below example:
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```python
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from transformers import pipeline
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pipe = pipeline("image-text-to-text", model="llava-hf/llava-v1.6-vicuna-7b-hf")
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messages = [
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{
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"role": "user",
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"content": [
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{"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/ai2d-demo.jpg"},
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{"type": "text", "text": "What does the label 15 represent? (1) lava (2) core (3) tunnel (4) ash cloud"},
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],
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},
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]
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out = pipe(text=messages, max_new_tokens=20)
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print(out)
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>>> [{'input_text': [{'role': 'user', 'content': [{'type': 'image', 'url': 'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/ai2d-demo.jpg'}, {'type': 'text', 'text': 'What does the label 15 represent? (1) lava (2) core (3) tunnel (4) ash cloud'}]}], 'generated_text': 'Lava'}]
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```
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You can also load and use the model like following:
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```python
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from transformers import LlavaNextProcessor, LlavaNextForConditionalGeneration
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import torch
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from PIL import Image
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import requests
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processor = LlavaNextProcessor.from_pretrained("llava-v1.6-vicuna-7b-hf")
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model = LlavaNextForConditionalGeneration.from_pretrained("llava-v1.6-vicuna-7b-hf", torch_dtype=torch.float16, low_cpu_mem_usage=True)
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model.to("cuda:0")
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# prepare image and text prompt, using the appropriate prompt template
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url = "https://github.com/haotian-liu/LLaVA/blob/1a91fc274d7c35a9b50b3cb29c4247ae5837ce39/images/llava_v1_5_radar.jpg?raw=true"
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image = Image.open(requests.get(url, stream=True).raw)
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# Define a chat histiry and use `apply_chat_template` to get correctly formatted prompt
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# Each value in "content" has to be a list of dicts with types ("text", "image")
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conversation = [
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{
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"role": "user",
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"content": [
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{"type": "text", "text": "What is shown in this image?"},
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{"type": "image"},
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],
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},
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]
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prompt = processor.apply_chat_template(conversation, add_generation_prompt=True)
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inputs = processor(images=image, text=prompt, return_tensors="pt").to("cuda:0")
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# autoregressively complete prompt
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output = model.generate(**inputs, max_new_tokens=100)
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print(processor.decode(output[0], skip_special_tokens=True))
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```
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-----------
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From transformers>=v4.48, you can also pass image url or local path to the conversation history, and let the chat template handle the rest.
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Chat template will load the image for you and return inputs in `torch.Tensor` which you can pass directly to `model.generate()`
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```python
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messages = [
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{
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"role": "user",
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"content": [
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{"type": "image", "url": "https://www.ilankelman.org/stopsigns/australia.jpg"}
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{"type": "text", "text": "What is shown in this image?"},
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],
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},
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]
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inputs = processor.apply_chat_template(messages, add_generation_prompt=True, tokenize=True, return_dict=True, return_tensors"pt")
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output = model.generate(**inputs, max_new_tokens=50)
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```
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### Model optimization
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#### 4-bit quantization through `bitsandbytes` library
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First make sure to install `bitsandbytes`, `pip install bitsandbytes` and make sure to have access to a CUDA compatible GPU device. Simply change the snippet above with:
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```diff
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model = LlavaNextForConditionalGeneration.from_pretrained(
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model_id,
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torch_dtype=torch.float16,
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low_cpu_mem_usage=True,
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+ load_in_4bit=True
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)
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```
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#### Use Flash-Attention 2 to further speed-up generation
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First make sure to install `flash-attn`. Refer to the [original repository of Flash Attention](https://github.com/Dao-AILab/flash-attention) regarding that package installation. Simply change the snippet above with:
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```diff
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model = LlavaNextForConditionalGeneration.from_pretrained(
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model_id,
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torch_dtype=torch.float16,
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low_cpu_mem_usage=True,
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+ use_flash_attention_2=True
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).to(0)
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```
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### BibTeX entry and citation info
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```bibtex
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@misc{liu2023improved,
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title={Improved Baselines with Visual Instruction Tuning},
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author={Haotian Liu and Chunyuan Li and Yuheng Li and Yong Jae Lee},
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year={2023},
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eprint={2310.03744},
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archivePrefix={arXiv},
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primaryClass={cs.CV}
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}
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```
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