README.md

metadata

datasets:
  - liuhaotian/LLaVA-Pretrain
  - liuhaotian/LLaVA-Instruct-150K
language:
  - en
tags:
  - llava
  - phi

LLaVA-3b

Model details

LLaVA-3b is a model fine-tuned from Dolphin 2.6 Phi in a LLaVA fashion using vision tower from SigLIP 400M. There are a couple of things different from the original LLaVA architecture:

1. Multiple image tokens. The multimodal projector generates embeddings of shape [5, 2560] instead of [1, 2560] for images. The idea is that using more tokens allows us to get more info from the image into the language model.
2. The model uses the output from the latest layer of the vision encoder instead of the intermediate one.
3. The context length during training was 1200 tokens, as the L4 GPUs I used didn't allow me to get more.

As Dolphin 2.6 Phi, LLaVA-3b uses ChatML prompt format:

<|im_start|>system
You are Dolphin, a helpful AI assistant.<|im_end|>
<|im_start|>user
{prompt}<|im_end|>
<|im_start|>assistant

How to use

Install dependencies

!pip install -q open_clip_torch timm einops

Download modeling files

from huggingface_hub import hf_hub_download

hf_hub_download(repo_id="visheratin/LLaVA-3b", filename="configuration_llava.py", local_dir="./", force_download=True)
hf_hub_download(repo_id="visheratin/LLaVA-3b", filename="configuration_phi.py", local_dir="./", force_download=True)
hf_hub_download(repo_id="visheratin/LLaVA-3b", filename="modeling_llava.py", local_dir="./", force_download=True)
hf_hub_download(repo_id="visheratin/LLaVA-3b", filename="modeling_phi.py", local_dir="./", force_download=True)
hf_hub_download(repo_id="visheratin/LLaVA-3b", filename="processing_llava.py", local_dir="./", force_download=True)

Create a model

from modeling_llava import LlavaForConditionalGeneration
import torch

model = LlavaForConditionalGeneration.from_pretrained("visheratin/LLaVA-3b", torch_dtype=torch.float16)
model = model.to("cuda")

Create processors

from transformers import AutoTokenizer
from processing_llava import LlavaProcessor, OpenCLIPImageProcessor

tokenizer = AutoTokenizer.from_pretrained("visheratin/LLaVA-3b")
image_processor = OpenCLIPImageProcessor(model.config.preprocess_config)
processor = LlavaProcessor(image_processor, tokenizer)

Set image and text

from PIL import Image
import requests

image_file = "https://images.unsplash.com/photo-1439246854758-f686a415d9da"
raw_image = Image.open(requests.get(image_file, stream=True).raw)

prompt = """<|im_start|>system
A chat between a curious human and an artificial intelligence assistant.
The assistant gives helpful, detailed, and polite answers to the human's questions.
The assistant does not hallucinate and pays very close attention to the details.<|im_end|>
<|im_start|>user
<image>
Describe the image.<|im_end|>
<|im_start|>assistant
"""

Process inputs

inputs = processor(prompt, raw_image, model, return_tensors='pt')

inputs['input_ids'] = inputs['input_ids'].to(model.device)
inputs['attention_mask'] = inputs['attention_mask'].to(model.device)

Generate the data

output = model.generate(**inputs, max_new_tokens=200, do_sample=True, top_p=0.5, temperature=1.2, eos_token_id=tokenizer.eos_token_id)

License

This model is based on Phi-2 and is governed by Microsoft's research license, which prohibits commercial use.

Acknowledgments

Thanks to ML Collective for providing credits for computing resources.