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processor.apply_chat_template().
That will apply the correct template for a given checkpoint for you."[INST] <image>\nWhat is shown in this image? [/INST]"pipeline, see the below example:1from transformers import pipeline
2
3pipe = pipeline("image-text-to-text", model="llava-hf/llava-v1.6-mistral-7b-hf")
4messages = [
5 {
6 "role": "user",
7 "content": [
8 {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/ai2d-demo.jpg"},
9 {"type": "text", "text": "What does the label 15 represent? (1) lava (2) core (3) tunnel (4) ash cloud"},
10 ],
11 },
12]
13
14out = pipe(text=messages, max_new_tokens=20)
15print(out)
16>>> [{'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'}]1from transformers import LlavaNextProcessor, LlavaNextForConditionalGeneration
2import torch
3from PIL import Image
4import requests
5
6processor = LlavaNextProcessor.from_pretrained("llava-hf/llava-v1.6-mistral-7b-hf")
7
8model = LlavaNextForConditionalGeneration.from_pretrained("llava-hf/llava-v1.6-mistral-7b-hf", torch_dtype=torch.float16, low_cpu_mem_usage=True)
9model.to("cuda:0")
10
11# prepare image and text prompt, using the appropriate prompt template
12url = "https://github.com/haotian-liu/LLaVA/blob/1a91fc274d7c35a9b50b3cb29c4247ae5837ce39/images/llava_v1_5_radar.jpg?raw=true"
13image = Image.open(requests.get(url, stream=True).raw)
14
15# Define a chat history and use `apply_chat_template` to get correctly formatted prompt
16# Each value in "content" has to be a list of dicts with types ("text", "image")
17conversation = [
18 {
19
20 "role": "user",
21 "content": [
22 {"type": "text", "text": "What is shown in this image?"},
23 {"type": "image"},
24 ],
25 },
26]
27prompt = processor.apply_chat_template(conversation, add_generation_prompt=True)
28
29inputs = processor(images=image, text=prompt, return_tensors="pt").to("cuda:0")
30
31# autoregressively complete prompt
32output = model.generate(**inputs, max_new_tokens=100)
33
34print(processor.decode(output[0], skip_special_tokens=True))torch.Tensor which you can pass directly to model.generate()1messages = [
2 {
3 "role": "user",
4 "content": [
5 {"type": "image", "url": "https://www.ilankelman.org/stopsigns/australia.jpg"},
6 {"type": "text", "text": "What is shown in this image?"},
7 ],
8 },
9]
10
11inputs = processor.apply_chat_template(messages, add_generation_prompt=True, tokenize=True, return_dict=True, return_tensors="pt")
12output = model.generate(**inputs, max_new_tokens=50)bitsandbytes librarybitsandbytes, pip install bitsandbytes and make sure to have access to a CUDA compatible GPU device. Simply change the snippet above with:1model = LlavaNextForConditionalGeneration.from_pretrained(
2 model_id,
3 torch_dtype=torch.float16,
4 low_cpu_mem_usage=True,
5+ load_in_4bit=True
6)flash-attn. Refer to the original repository of Flash Attention regarding that package installation. Simply change the snippet above with:1model = LlavaNextForConditionalGeneration.from_pretrained(
2 model_id,
3 torch_dtype=torch.float16,
4 low_cpu_mem_usage=True,
5+ use_flash_attention_2=True
6).to(0)1@misc{liu2023improved,
2 title={Improved Baselines with Visual Instruction Tuning},
3 author={Haotian Liu and Chunyuan Li and Yuheng Li and Yong Jae Lee},
4 year={2023},
5 eprint={2310.03744},
6 archivePrefix={arXiv},
7 primaryClass={cs.CV}
8}