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E5-V: Universal Embeddings with Multimodal Large Language Models

E5-V is fine-tuned based on lmms-lab/llama3-llava-next-8b.

Overview

We propose a framework, called E5-V, to adpat MLLMs for achieving multimodal embeddings. E5-V effectively bridges the modality gap between different types of inputs, demonstrating strong performance in multimodal embeddings even without fine-tuning. We also propose a single modality training approach for E5-V, where the model is trained exclusively on text pairs, demonstrating better performance than multimodal training.

More details can be found in https://github.com/kongds/E5-V

Example

import torch
import torch.nn.functional as F
import requests
from PIL import Image
from transformers import AutoTokenizer
from transformers import LlavaNextProcessor, LlavaNextForConditionalGeneration

llama3_template = '<|start_header_id|>user<|end_header_id|>\n\n{}<|eot_id|><|start_header_id|>assistant<|end_header_id|>\n\n \n'

processor = LlavaNextProcessor.from_pretrained('royokong/e5-v')
model = LlavaNextForConditionalGeneration.from_pretrained('royokong/e5-v', torch_dtype=torch.float16).cuda()

img_prompt = llama3_template.format('<image>\nSummary above image in one word: ')
text_prompt = llama3_template.format('<sent>\nSummary above sentence in one word: ')

urls = ['https://upload.wikimedia.org/wikipedia/commons/thumb/4/47/American_Eskimo_Dog.jpg/360px-American_Eskimo_Dog.jpg',
        'https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Felis_catus-cat_on_snow.jpg/179px-Felis_catus-cat_on_snow.jpg']
images = [Image.open(requests.get(url, stream=True).raw) for url in urls]

texts = ['A dog sitting in the grass.',
         'A cat standing in the snow.']

text_inputs = processor([text_prompt.replace('<sent>', text) for text in texts], return_tensors="pt", padding=True).to('cuda')
img_inputs = processor([img_prompt]*len(images), images, return_tensors="pt", padding=True).to('cuda')

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Tags

Library