import os import torch import torchvision import torchvision.transforms as transforms from torch.utils.data import Dataset, DataLoader import gradio as gr import sys import tqdm sys.path.append(os.path.abspath(os.path.join("", ".."))) import gc import warnings warnings.filterwarnings("ignore") from PIL import Image import numpy as np from utils import load_models from editing import get_direction, debias from sampling import sample_weights from lora_w2w import LoRAw2w from huggingface_hub import snapshot_download import spaces models_path = snapshot_download(repo_id="Snapchat/w2w") class main(): def __init__(self): super(main, self).__init__() device = "cuda" mean = torch.load(f"{models_path}/files/mean.pt", map_location=torch.device('cpu')).bfloat16().to(device) std = torch.load(f"{models_path}/files/std.pt", map_location=torch.device('cpu')).bfloat16().to(device) v = torch.load(f"{models_path}/files/V.pt", map_location=torch.device('cpu')).bfloat16().to(device) proj = torch.load(f"{models_path}/files/proj_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device) df = torch.load(f"{models_path}/files/identity_df.pt") weight_dimensions = torch.load(f"{models_path}/files/weight_dimensions.pt") pinverse = torch.load(f"{models_path}/files/pinverse_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device) self.device = device self.mean = mean self.std = std self.v = v self.proj = proj self.df = df self.weight_dimensions = weight_dimensions self.pinverse = pinverse self.unet, self.vae, self.text_encoder, self.tokenizer, self.noise_scheduler = load_models(device) self.network = None young = get_direction(df, "Young", pinverse, 1000, device) young = debias(young, "Male", df, pinverse, device) young = debias(young, "Pointy_Nose", df, pinverse, device) young = debias(young, "Wavy_Hair", df, pinverse, device) young = debias(young, "Chubby", df, pinverse, device) young = debias(young, "No_Beard", df, pinverse, device) young = debias(young, "Mustache", df, pinverse, device) self.young = young pointy = get_direction(df, "Pointy_Nose", pinverse, 1000, device) pointy = debias(pointy, "Young", df, pinverse, device) pointy = debias(pointy, "Male", df, pinverse, device) pointy = debias(pointy, "Wavy_Hair", df, pinverse, device) pointy = debias(pointy, "Chubby", df, pinverse, device) pointy = debias(pointy, "Heavy_Makeup", df, pinverse, device) self.pointy = pointy wavy = get_direction(df, "Wavy_Hair", pinverse, 1000, device) wavy = debias(wavy, "Young", df, pinverse, device) wavy = debias(wavy, "Male", df, pinverse, device) wavy = debias(wavy, "Pointy_Nose", df, pinverse, device) wavy = debias(wavy, "Chubby", df, pinverse, device) wavy = debias(wavy, "Heavy_Makeup", df, pinverse, device) self.wavy = wavy thick = get_direction(df, "Bushy_Eyebrows", pinverse, 1000, device) thick = debias(thick, "Male", df, pinverse, device) thick = debias(thick, "Young", df, pinverse, device) thick = debias(thick, "Pointy_Nose", df, pinverse, device) thick = debias(thick, "Wavy_Hair", df, pinverse, device) thick = debias(thick, "Mustache", df, pinverse, device) thick = debias(thick, "No_Beard", df, pinverse, device) thick = debias(thick, "Sideburns", df, pinverse, device) thick = debias(thick, "Big_Nose", df, pinverse, device) thick = debias(thick, "Big_Lips", df, pinverse, device) thick = debias(thick, "Black_Hair", df, pinverse, device) thick = debias(thick, "Brown_Hair", df, pinverse, device) thick = debias(thick, "Pale_Skin", df, pinverse, device) thick = debias(thick, "Heavy_Makeup", df, pinverse, device) self.thick = thick def sample_model(self): self.unet, _, _, _, _ = load_models(self.device) self.network = sample_weights(self.unet, self.proj, self.mean, self.std, self.v[:, :1000], self.device, factor = 1.00) @torch.no_grad() @spaces.GPU def inference(self, prompt, negative_prompt, guidance_scale, ddim_steps, seed): generator = torch.Generator(device=device).manual_seed(seed) latents = torch.randn( (1, self.unet.in_channels, 512 // 8, 512 // 8), generator = generator, device = self.device ).bfloat16() text_input = self.tokenizer(prompt, padding="max_length", max_length=self.tokenizer.model_max_length, truncation=True, return_tensors="pt") text_embeddings = self.text_encoder(text_input.input_ids.to(device))[0] max_length = text_input.input_ids.shape[-1] uncond_input = self.tokenizer( [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt" ) uncond_embeddings = self.text_encoder(uncond_input.input_ids.to(device))[0] text_embeddings = torch.cat([uncond_embeddings, text_embeddings]) self.noise_scheduler.set_timesteps(ddim_steps) latents = latents * self.noise_scheduler.init_noise_sigma for i,t in enumerate(tqdm.tqdm(self.noise_scheduler.timesteps)): latent_model_input = torch.cat([latents] * 2) latent_model_input = self.noise_scheduler.scale_model_input(latent_model_input, timestep=t) with self.network: noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample #guidance noise_pred_uncond, noise_pred_text = noise_pred.chunk(2) noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond) latents = noise_scheduler.step(noise_pred, t, latents).prev_sample latents = 1 / 0.18215 * latents image = self.vae.decode(latents).sample image = (image / 2 + 0.5).clamp(0, 1) image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0] image = Image.fromarray((image * 255).round().astype("uint8")) return image @torch.no_grad() @spaces.GPU def edit_inference(self, prompt, negative_prompt, guidance_scale, ddim_steps, seed, start_noise, a1, a2, a3, a4): original_weights = self,network.proj.clone() #pad to same number of PCs pcs_original = original_weights.shape[1] pcs_edits = self.young.shape[1] padding = torch.zeros((1,pcs_original-pcs_edits)).to(device) young_pad = torch.cat((self.young, padding), 1) pointy_pad = torch.cat((self.pointy, padding), 1) wavy_pad = torch.cat((self.wavy, padding), 1) thick_pad = torch.cat((self.thick, padding), 1) edited_weights = original_weights+a1*1e6*young_pad+a2*1e6*pointy_pad+a3*1e6*wavy_pad+a4*2e6*thick_pad generator = torch.Generator(device=device).manual_seed(seed) latents = torch.randn( (1, self.unet.in_channels, 512 // 8, 512 // 8), generator = generator, device = self.device ).bfloat16() text_input = self.tokenizer(prompt, padding="max_length", max_length=self.tokenizer.model_max_length, truncation=True, return_tensors="pt") text_embeddings = text_encoder(text_input.input_ids.to(device))[0] max_length = text_input.input_ids.shape[-1] uncond_input = tokenizer( [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt" ) uncond_embeddings = text_encoder(uncond_input.input_ids.to(device))[0] text_embeddings = torch.cat([uncond_embeddings, text_embeddings]) noise_scheduler.set_timesteps(ddim_steps) latents = latents * noise_scheduler.init_noise_sigma for i,t in enumerate(tqdm.tqdm(self.noise_scheduler.timesteps)): latent_model_input = torch.cat([latents] * 2) latent_model_input = self.noise_scheduler.scale_model_input(latent_model_input, timestep=t) if t>start_noise: pass elif t<=start_noise: self.network.proj = torch.nn.Parameter(edited_weights) self.network.reset() with self.network: noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample #guidance noise_pred_uncond, noise_pred_text = noise_pred.chunk(2) noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond) latents = noise_scheduler.step(noise_pred, t, latents).prev_sample latents = 1 / 0.18215 * latents image = self.vae.decode(latents).sample image = (image / 2 + 0.5).clamp(0, 1) image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0] image = Image.fromarray((image * 255).round().astype("uint8")) #reset weights back to original self.network.proj = torch.nn.Parameter(original_weights) self.network.reset() return image @spaces.GPU def sample_then_run(self): sample_model() prompt = "sks person" negative_prompt = "low quality, blurry, unfinished, nudity, weapon" seed = 5 cfg = 3.0 steps = 25 image = inference( prompt, negative_prompt, cfg, steps, seed) torch.save(self.network.proj, "model.pt" ) return image, "model.pt" class CustomImageDataset(Dataset): def __init__(self, images, transform=None): self.images = images self.transform = transform def __len__(self): return len(self.images) def __getitem__(self, idx): image = self.images[idx] if self.transform: image = self.transform(image) return image @spaces.GPU def invert(image, mask, pcs=10000, epochs=400, weight_decay = 1e-10, lr=1e-1): del unet del network unet, _, _, _, _ = load_models(device) proj = torch.zeros(1,pcs).bfloat16().to(device) network = LoRAw2w( proj, mean, std, v[:, :pcs], unet, rank=1, multiplier=1.0, alpha=27.0, train_method="xattn-strict" ).to(device, torch.bfloat16) ### load mask mask = transforms.Resize((64,64), interpolation=transforms.InterpolationMode.BILINEAR)(mask) mask = torchvision.transforms.functional.pil_to_tensor(mask).unsqueeze(0).to(device).bfloat16()[:,0,:,:].unsqueeze(1) ### check if an actual mask was draw, otherwise mask is just all ones if torch.sum(mask) == 0: mask = torch.ones((1,1,64,64)).to(device).bfloat16() ### single image dataset image_transforms = transforms.Compose([transforms.Resize(512, interpolation=transforms.InterpolationMode.BILINEAR), transforms.RandomCrop(512), transforms.ToTensor(), transforms.Normalize([0.5], [0.5])]) train_dataset = CustomImageDataset(image, transform=image_transforms) train_dataloader = torch.utils.data.DataLoader(train_dataset, batch_size=1, shuffle=True) ### optimizer optim = torch.optim.Adam(network.parameters(), lr=lr, weight_decay=weight_decay) ### training loop unet.train() for epoch in tqdm.tqdm(range(epochs)): for batch in train_dataloader: ### prepare inputs batch = batch.to(device).bfloat16() latents = vae.encode(batch).latent_dist.sample() latents = latents*0.18215 noise = torch.randn_like(latents) bsz = latents.shape[0] timesteps = torch.randint(0, noise_scheduler.config.num_train_timesteps, (bsz,), device=latents.device) timesteps = timesteps.long() noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps) text_input = tokenizer("sks person", padding="max_length", max_length=tokenizer.model_max_length, truncation=True, return_tensors="pt") text_embeddings = text_encoder(text_input.input_ids.to(device))[0] ### loss + sgd step with network: model_pred = unet(noisy_latents, timesteps, text_embeddings).sample loss = torch.nn.functional.mse_loss(mask*model_pred.float(), mask*noise.float(), reduction="mean") optim.zero_grad() loss.backward() optim.step() ### return optimized network return network @spaces.GPU def run_inversion(dict, pcs, epochs, weight_decay,lr): init_image = dict["image"].convert("RGB").resize((512, 512)) mask = dict["mask"].convert("RGB").resize((512, 512)) network = invert([init_image], mask, pcs, epochs, weight_decay,lr) #sample an image prompt = "sks person" negative_prompt = "low quality, blurry, unfinished, nudity" seed = 5 cfg = 3.0 steps = 25 image = inference( prompt, negative_prompt, cfg, steps, seed) torch.save(network.proj, "model.pt" ) return image, "model.pt" @spaces.GPU def file_upload(file): del unet del network proj = torch.load(file.name).to(device) #pad to 10000 Principal components to keep everything consistent pcs = proj.shape[1] padding = torch.zeros((1,10000-pcs)).to(device) proj = torch.cat((proj, padding), 1) unet, _, _, _, _ = load_models(device) network = LoRAw2w( proj, mean, std, v[:, :10000], unet, rank=1, multiplier=1.0, alpha=27.0, train_method="xattn-strict" ).to(device, torch.bfloat16) prompt = "sks person" negative_prompt = "low quality, blurry, unfinished, nudity" seed = 5 cfg = 3.0 steps = 25 image = inference( prompt, negative_prompt, cfg, steps, seed) return image intro = """

weights2weights Demo

Interpreting the Weight Space of Customized Diffusion Models

Project Page | Paper | Code | Duplicate Space

""" with gr.Blocks(css="style.css") as demo: model = main() gr.HTML(intro) gr.Markdown("""
In this demo, you can get an identity-encoding model by sampling or inverting. To use a model previously downloaded from this demo see \"Uploading a model\" in the Advanced Options. Next, you can generate new images from it, or edit the identity encoded in the model and generate images from the edited model. We provide detailed instructions and tips at the bottom of the page.""") with gr.Column(): with gr.Row(): with gr.Column(): gr.Markdown("""1) Either sample a new model, or upload an image (optionally draw a mask over the head) and click `invert`.""") sample = gr.Button("🎲 Sample New Model") input_image = gr.ImageEditor(elem_id="image_upload", type='pil', label="Reference Identity", width=512, height=512) with gr.Row(): invert_button = gr.Button("⬆️ Invert") with gr.Column(): gr.Markdown("""2) Generate images of the sampled/inverted identity or edit the identity with the sliders and generate new images with various prompts and seeds.""") gallery = gr.Image(label="Generated Image",height=512, width=512, interactive=False) submit = gr.Button("Generate") prompt = gr.Textbox(label="Prompt", info="Make sure to include 'sks person'" , placeholder="sks person", value="sks person") seed = gr.Number(value=5, label="Seed", precision=0, interactive=True) # Editing with gr.Column(): with gr.Row(): a1 = gr.Slider(label="- Young +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True) a2 = gr.Slider(label="- Pointy Nose +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True) with gr.Row(): a3 = gr.Slider(label="- Curly Hair +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True) a4 = gr.Slider(label="- Thick Eyebrows +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True) with gr.Accordion("Advanced Options", open=False): with gr.Tab("Inversion"): with gr.Row(): lr = gr.Number(value=1e-1, label="Learning Rate", interactive=True) pcs = gr.Slider(label="# Principal Components", value=10000, step=1, minimum=1, maximum=10000, interactive=True) with gr.Row(): epochs = gr.Slider(label="Epochs", value=800, step=1, minimum=1, maximum=2000, interactive=True) weight_decay = gr.Number(value=1e-10, label="Weight Decay", interactive=True) with gr.Tab("Sampling"): with gr.Row(): cfg= gr.Slider(label="CFG", value=3.0, step=0.1, minimum=0, maximum=10, interactive=True) steps = gr.Slider(label="Inference Steps", value=25, step=1, minimum=0, maximum=100, interactive=True) with gr.Row(): negative_prompt = gr.Textbox(label="Negative Prompt", placeholder="low quality, blurry, unfinished, nudity, weapon", value="low quality, blurry, unfinished, nudity, weapon") injection_step = gr.Slider(label="Injection Step", value=800, step=1, minimum=0, maximum=1000, interactive=True) with gr.Tab("Uploading a model"): gr.Markdown("""
Upload a model below downloaded from this demo.""") file_input = gr.File(label="Upload Model", container=True) gr.Markdown("""
After sampling a new model or inverting, you can download the model below.""") with gr.Row(): file_output = gr.File(label="Download Sampled/Inverted Model", container=True, interactive=False) invert_button.click(fn=run_inversion, inputs=[input_image, pcs, epochs, weight_decay,lr], outputs = [input_image, file_output]) sample.click(fn=model.sample_then_run, outputs=[input_image, file_output]) submit.click( fn=model.edit_inference, inputs=[prompt, negative_prompt, cfg, steps, seed, injection_step, a1, a2, a3, a4], outputs=[gallery] ) file_input.change(fn=file_upload, inputs=file_input, outputs = gallery) help_text1 = """ Instructions: 1. To get results faster without waiting in queue, you can duplicate into a private space with an A100 GPU. 2. To begin, you will have to get an identity-encoding model. You can either sample one from *weights2weights* space by clicking `Sample New Model` or by uploading an image and clicking `invert` to invert the identity into a model. You can optionally draw over the head to define a mask in the image for better results. Sampling a model takes around 10 seconds and inversion takes around 2 minutes. After this is done, you can optionally download this model for later use. A model can be uploaded in the \"Uploading a model\" tab in the `Advanced Options`. 3. After getting a model, an image of the identity will be displayed on the right. You can sample from the model by changing seeds as well as prompts and then clicking `Generate`. Make sure to include \"sks person\" in your prompt to keep the same identity. 4. The identity in the model can be edited by changing the sliders for various attributes. After clicking `Generate`, you can see how the identity has changed and the effects are maintained across different seeds and prompts. """ help_text2 = """Tips: 1. Editing and Identity Generation * If you are interested in preserving more of the image during identity-editing (i.e., where the same seed and prompt results in the same image with only the identity changed), you can play with the "Injection Step" parameter in the \"Sampling\" tab in the `Advanced Options`. During the first *n* timesteps, the original model's weights will be used, and then the edited weights will be set during the remaining steps. Values closer to 1000 will set the edited weights early, having a more pronounced effect, which may disrupt some semantics and structure of the generated image. Lower values will set the edited weights later, better preserving image context. We notice that around 600-800 tends to produce the best results. Larger values in the range (700-1000) are helpful for more global attribute changes, while smaller (400-700) can be used for more finegrained edits. Although it is not always needed. * You can play around with negative prompts, number of inference steps, and CFG in the \"Sampling\" tab in the `Advanced Options` to affect the ultimate image quality. * Sometimes the identity will not be perfectly consistent (e.g., there might be small variations of the face) when you use some seeds or prompts. This is a limitation of our method as well as an open-problem in personalized models. 2. Inversion * To obtain the best results for inversion, upload a high resolution photo of the face with minimal occlusion. It is recommended to draw over the face and hair to define a mask. But inversion should still work generally for non-closeup face shots. * For inverting a realistic photo of an identity, typically 800 epochs with lr=1e-1 and 10,000 principal components (PCs) works well. If the resulting generations have artifacted and unrealstic textures, there is probably overfitting and you may want to reduce the number of epochs or learning rate, or play with weight decay. If the generations do not look like the input photo, then you may want to increase the number of epochs. * For inverting out-of-distribution identities, such as artistic renditions of people or non-humans (e.g. the ones shown in the paper), it is recommended to use 1000 PCs, lr=1, and train for 800 epochs. * Note that if you change the number of PCs, you will probably need to change the learning rate. For less PCs, higher learning rates are typically required.""" gr.Markdown(help_text1) gr.Markdown(help_text2) demo.queue().launch()