app.py

import os
import json
import torch
import gc
import numpy as np
import gradio as gr
from PIL import Image
from diffusers import StableDiffusionXLPipeline
import open_clip
from huggingface_hub import hf_hub_download
from IP_Composer.IP_Adapter.ip_adapter import IPAdapterXL
from IP_Composer.perform_swap import compute_dataset_embeds_svd, get_modified_images_embeds_composition
import spaces
import random

device = "cuda" if torch.cuda.is_available() else "cpu"

# Initialize SDXL pipeline
base_model_path = "stabilityai/stable-diffusion-xl-base-1.0"
pipe = StableDiffusionXLPipeline.from_pretrained(
    base_model_path,
    torch_dtype=torch.float16,
    add_watermarker=False,
)

# Initialize IP-Adapter
image_encoder_repo = 'h94/IP-Adapter'
image_encoder_subfolder = 'models/image_encoder'
ip_ckpt = hf_hub_download('h94/IP-Adapter', subfolder="sdxl_models", filename='ip-adapter_sdxl_vit-h.bin')
ip_model = IPAdapterXL(pipe, image_encoder_repo, image_encoder_subfolder, ip_ckpt, device)

# Initialize CLIP model
clip_model, _, preprocess = open_clip.create_model_and_transforms('hf-hub:laion/CLIP-ViT-H-14-laion2B-s32B-b79K')
clip_model.to(device)

CONCEPTS_MAP={
    "age": "age_descriptions.npy",
    "animal fur": "fur_descriptions.npy",
    "dogs": "dog_descriptions.npy",
    "emotions": "emotion_descriptions.npy",
    "flowers": "flower_descriptions.npy",
    "fruit/vegtable": "fruit_vegetable_descriptions.npy",
    "outfit type": "outfit_descriptions.npy",
    "outfit pattern (including color)": "outfit_pattern_descriptions.npy",
    "patterns": "pattern_descriptions.npy",
    "patterns (including color)": "pattern_descriptions_with_colors.npy",
    "vehicle": "vehicle_descriptions.npy",
    "daytime": "times_of_day_descriptions.npy",
    "pose": "person_poses_descriptions.npy",
    "season": "season_descriptions.npy",
    "material": "material_descriptions_with_gems.npy"
}
RANKS_MAP={
    "age": 30,
    "animal fur": 80,
    "dogs": 30,
    "emotions": 30,
    "flowers": 30,
    "fruit/vegtable": 30, 
    "outfit type": 30,
    "outfit pattern (including color)": 80,
    "patterns": 80,
    "patterns (including color)": 80,
    "vehicle": 30,
    "daytime": 30,
    "pose": 30,
    "season": 30,
    "material": 80,
}
concept_options = list(CONCEPTS_MAP.keys())


examples = [
    ['./IP_Composer/assets/objects/mug.png', './IP_Composer/assets/patterns/splash.png', 'patterns (including color)', None, None, None, None, 80, 30, 30, None,1.0,0, 30],
    ['./IP_Composer/assets/emotions/joyful.png', './IP_Composer/assets/emotions/sad.png', 'emotions', './IP_Composer/assets/age/kid.png', 'age', None, None, 30, 30, 30, None,1.0,0, 30]
    
]

def generate_examples(base_image, 
                      concept_image1, concept_name1,
                      concept_image2, concept_name2,
                      concept_image3, concept_name3,
                      rank1, rank2, rank3, 
                      prompt, scale, seed, num_inference_steps):
    return process_and_display(base_image, 
                      concept_image1, concept_name1,
                      concept_image2, concept_name2,
                      concept_image3, concept_name3,
                      rank1, rank2, rank3, 
                      prompt, scale, seed, num_inference_steps)



    
MAX_SEED = np.iinfo(np.int32).max
def randomize_seed_fn(seed: int, randomize_seed: bool) -> int:
    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    return seed

def change_rank_default(concept_name):
    return RANKS_MAP.get(concept_name, 30)

@spaces.GPU
def get_image_embeds(pil_image, model=clip_model, preproc=preprocess, dev=device):
    """Get CLIP image embeddings for a given PIL image"""
    image = preproc(pil_image)[np.newaxis, :, :, :]
    with torch.no_grad():
        embeds = model.encode_image(image.to(dev))
    return embeds.cpu().detach().numpy()

@spaces.GPU
def process_images(
    base_image, 
    concept_image1, concept_name1,
    concept_image2=None, concept_name2=None,
    concept_image3=None, concept_name3=None,
    rank1=10, rank2=10, rank3=10,
    prompt=None, 
    scale=1.0,
    seed=420,
    num_inference_steps=50,
):
    """Process the base image and concept images to generate modified images"""
    # Process base image
    base_image_pil = Image.fromarray(base_image).convert("RGB")
    base_embed = get_image_embeds(base_image_pil, clip_model, preprocess, device)
    
    # Process concept images
    concept_images = []
    concept_descriptions = []
    
    # for demo purposes we allow for up to 3 different concepts and corresponding concept images 
    if concept_image1 is not None:
        concept_images.append(concept_image1)
        concept_descriptions.append(CONCEPTS_MAP[concept_name1])
    else:
        return None, "Please upload at least one concept image"
    
    # Add second concept (optional)
    if concept_image2 is not None:
        concept_images.append(concept_image2)
        concept_descriptions.append(CONCEPTS_MAP[concept_name2])
    
    # Add third concept (optional)
    if concept_image3 is not None:
        concept_images.append(concept_image3)
        concept_descriptions.append(CONCEPTS_MAP[concept_name3])
    
    # Get all ranks
    ranks = [rank1]
    if concept_image2 is not None:
        ranks.append(rank2)
    if concept_image3 is not None:
        ranks.append(rank3)
        
    
    concept_embeds = []
    projection_matrices = []
    # for the demo, we assume 1 concept image per concept
    # for each concept image, we calculate it's image embeedings and load the concepts textual embeddings to copmpute the projection matrix over it
    for i, concept_name in enumerate(concept_descriptions):
        img_pil = Image.fromarray(concept_images[i]).convert("RGB")
        concept_embeds.append(get_image_embeds(img_pil, clip_model, preprocess, device))
        embeds_path = f"./IP_Composer/text_embeddings/{concept_name}"
        with open(embeds_path, "rb") as f:
            all_embeds_in = np.load(f)
        
        projection_matrix = compute_dataset_embeds_svd(all_embeds_in, ranks[i])
        projection_matrices.append(projection_matrix)
    
    
    # Create projection data structure for the composition
    projections_data = [
        {
            "embed": embed,
            "projection_matrix": proj_matrix
        }
        for embed, proj_matrix in zip(concept_embeds, projection_matrices)
    ]
    
    # Generate modified images - 
    modified_images = get_modified_images_embeds_composition(
        base_embed, 
        projections_data, 
        ip_model, 
        prompt=prompt, 
        scale=scale, 
        num_samples=1, 
        seed=seed,
        num_inference_steps=num_inference_steps
    )
    
    return modified_images[0]

def process_and_display(
    base_image, 
    concept_image1, concept_name1="age",
    concept_image2=None, concept_name2=None,
    concept_image3=None, concept_name3=None,
    rank1=30, rank2=30, rank3=30,
    prompt=None, scale=1.0, seed=0, num_inference_steps=50,
):
    if base_image is None:
        raise gr.Error("please upload a base image")
    
    if concept_image1 is None:
        raise gr.Error("choose at least one concept image")

    if concept_image1 is None:
        raise gr.Error("choose at least one concept type")
    
    modified_images = process_images(
        base_image, 
        concept_image1, concept_name1,
        concept_image2, concept_name2,
        concept_image3, concept_name3,
        rank1, rank2, rank3, 
        prompt, scale, seed, num_inference_steps
    )
    
    return modified_images

# UI CSS
css = """
#col-container {
    margin: 0 auto;
    max-width: 960px;
}
"""

with gr.Blocks(css=css) as demo:
        gr.Markdown(f"""# IP Composer 🌅✚🖌️
### compose new images with visual concepts
following the algorithm proposed in [*IP-Composer: Semantic Composition of Visual Concepts* by Dorfman et al.](https://arxiv.org/pdf/2502.13951)

[[project page](https://ip-composer.github.io/IP-Composer/)] [[arxiv](https://arxiv.org/pdf/2502.13951)]
        """)
        
        with gr.Row():
            with gr.Column():
                base_image = gr.Image(label="Base Image (Required)", type="numpy")
                with gr.Tab("concept 1"):  
                  with gr.Row():
                      with gr.Group():
                          concept_image1 = gr.Image(label="Concept Image 1", type="numpy")
                          concept_name1 = gr.Dropdown(concept_options, label="concept 1", value=None, info="concept type")
                          
                with gr.Tab("concept 2 - optional"):            
                     with gr.Group():    
                          concept_image2 = gr.Image(label="Concept Image 2", type="numpy")
                          concept_name2 = gr.Dropdown(concept_options, label="concept 2", value=None, info="concept type")
                with gr.Tab("concept 3 - optional"):
                      with gr.Group():
                          concept_image3 = gr.Image(label="Concept Image 3", type="numpy")
                          concept_name3 = gr.Dropdown(concept_options, label="concept 3", value= None, info="concept type")
               
            
                with gr.Accordion("Advanced options", open=False):
                    prompt = gr.Textbox(label="Guidance Prompt (Optional)", placeholder="Optional text prompt to guide generation")
                    num_inference_steps = gr.Slider(minimum=1, maximum=50, value=30, step=1, label="num steps")
                    with gr.Row():
                        scale = gr.Slider(minimum=0.1, maximum=2.0, value=1.0, step=0.1, label="Scale")
                        randomize_seed = gr.Checkbox(value=True, label="Randomize seed")
                        seed = gr.Number(value=0, label="Seed", precision=0)
                    with gr.Row():
                        rank1 = gr.Slider(minimum=1, maximum=150, value=30, step=1, label="rank concept 1", info="rank of projection matrix")
                        rank2 = gr.Slider(minimum=1, maximum=150, value=30, step=1, label="rank concept 2")
                        rank3 = gr.Slider(minimum=1, maximum=150, value=30, step=1, label="rank concept 3")
            
            with gr.Column():
                output_image = gr.Image(label="composed output", show_label=True)
                submit_btn = gr.Button("Generate")
        
        gr.Examples(
        examples,
        inputs=[base_image, 
                concept_image1, concept_name1,
                concept_image2, concept_name2,
                concept_image3, concept_name3,
                rank1, rank2, rank3, 
                prompt, scale, seed, num_inference_steps],
        outputs=[output_image],
        fn=generate_examples,
        cache_examples=False
        )
        
        submit_btn.click(
            fn=randomize_seed_fn,
            inputs=[seed, randomize_seed],
            outputs=seed,
        ).then(fn=process_and_display,
            inputs=[
                base_image, 
                concept_image1, concept_name1,
                concept_image2, concept_name2,
                concept_image3, concept_name3,
                rank1, rank2, rank3, 
                prompt, scale, seed, num_inference_steps
            ],
            outputs=[output_image]
        )

        concept_name1.select(
            fn= change_rank_default,
            inputs=[concept_name1],
            outputs=[rank1]
        )
        concept_name2.select(
            fn= change_rank_default,
            inputs=[concept_name2],
            outputs=[rank2]
        )
        concept_name3.select(
            fn= change_rank_default,
            inputs=[concept_name3],
            outputs=[rank3]
        )
    
    

demo.launch()