Emu2-Gen

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Model Weights

Inference (Huggingface Version)

Emu2-Gen

from modelscope import snapshot_download
from diffusers import AutoPipelineForText2Image
import torch
import cv2
from diffusers import DiffusionPipeline
import numpy as np
from PIL import Image
import requests
from modelscope import AutoModelForCausalLM, AutoTokenizer
import os

# For the first time of using,
# you need to download the modelscope repo "AI-ModelScope/Emu2-Gen" to local first
path = snapshot_download("AI-ModelScope/Emu2-Gen",revision='master')

multimodal_encoder = AutoModelForCausalLM.from_pretrained(
    f"{path}/multimodal_encoder",
    trust_remote_code=True,
    torch_dtype=torch.bfloat16,
    use_safetensors=True,
    variant="bf16"
)
tokenizer = AutoTokenizer.from_pretrained(f"{path}/tokenizer")

pipe = DiffusionPipeline.from_pretrained(
    path,
    custom_pipeline="pipeline_emu2_gen",
    torch_dtype=torch.bfloat16,
    use_safetensors=True,
    variant="bf16",
    multimodal_encoder=multimodal_encoder,
    tokenizer=tokenizer,
)

# For the non-first time of using, you can init the pipeline directly
pipe = DiffusionPipeline.from_pretrained(
    path,
    custom_pipeline="pipeline_emu2_gen",
    torch_dtype=torch.bfloat16,
    use_safetensors=True,
    variant="bf16",
)

pipe.to("cuda")

# text-to-image
prompt = "impressionist painting of an astronaut in a jungle"
ret = pipe(prompt)
ret.image.save("astronaut.png")

# image editing
image = Image.open(os.path.join(path,"examples/dog.jpg")).convert('RGB')
prompt = [image, "wearing a red hat on the beach."]
ret = pipe(prompt)
ret.image.save("dog_hat_beach.png")

# grounding generation
def draw_box(left, top, right, bottom):
    mask = np.zeros((448, 448, 3), dtype=np.uint8)
    mask = cv2.rectangle(mask, (left, top), (right, bottom), (255, 255, 255), 3)
    mask = Image.fromarray(mask)
    return mask

dog1 = Image.open(os.path.join(path,"examples/dog1.jpg")).convert('RGB')
dog2 = Image.open(os.path.join(path,"examples/dog2.jpg")).convert('RGB')
dog3 = Image.open(os.path.join(path,"examples/dog3.jpg")).convert('RGB')
dog1_mask = draw_box( 22,  14, 224, 224)
dog2_mask = draw_box(224,  10, 448, 224)
dog3_mask = draw_box(120, 264, 320, 438)

prompt = [
    "<grounding>",
    "An oil painting of three dogs,",
    "<phrase>the first dog</phrase>"
    "<object>",
    dog1_mask,
    "</object>",
    dog1,
    "<phrase>the second dog</phrase>"
    "<object>",
    dog2_mask,
    "</object>",
    dog2,
    "<phrase>the third dog</phrase>"
    "<object>",
    dog3_mask,
    "</object>",
    dog3,
]
ret = pipe(prompt)
ret.image.save("three_dogs.png")

# Autoencoding
# to enable the autoencoding mode, you can only input exactly one image as prompt
# if you want the model to generate an image,
# please input extra empty text "" besides the image, e.g.
#   autoencoding mode: prompt = image or [image]
#   generation mode: prompt = ["", image] or [image, ""]
prompt = Image.open(os.path.join(path,"examples/doodle.jpg")).convert("RGB")
ret = pipe(prompt)
ret.image.save("doodle_ae.png")

Citation

If you find Emu2 useful for your research and applications, please consider starring this repository and citing:

@article{Emu2,
    title={Generative Multimodal Models are In-Context Learners}, 
    author={Quan Sun and Yufeng Cui and Xiaosong Zhang and Fan Zhang and Qiying Yu and Zhengxiong Luo and Yueze Wang and Yongming Rao and Jingjing Liu and Tiejun Huang and Xinlong Wang},
    publisher={arXiv preprint arXiv:2312.13286},
    year={2023},
}