import sys import torch import numpy as np import streamlit as st from PIL import Image from omegaconf import OmegaConf from einops import repeat, rearrange from pytorch_lightning import seed_everything from imwatermark import WatermarkEncoder from scripts.txt2img import put_watermark from ldm.models.diffusion.ddim import DDIMSampler from ldm.models.diffusion.ddpm import LatentUpscaleDiffusion, LatentUpscaleFinetuneDiffusion from ldm.util import exists, instantiate_from_config torch.set_grad_enabled(False) @st.cache(allow_output_mutation=True) def initialize_model(config, ckpt): config = OmegaConf.load(config) model = instantiate_from_config(config.model) model.load_state_dict(torch.load(ckpt)["state_dict"], strict=False) device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu") model = model.to(device) sampler = DDIMSampler(model) return sampler def make_batch_sd( image, txt, device, num_samples=1, ): image = np.array(image.convert("RGB")) image = torch.from_numpy(image).to(dtype=torch.float32) / 127.5 - 1.0 batch = { "lr": rearrange(image, 'h w c -> 1 c h w'), "txt": num_samples * [txt], } batch["lr"] = repeat(batch["lr"].to(device=device), "1 ... -> n ...", n=num_samples) return batch def make_noise_augmentation(model, batch, noise_level=None): x_low = batch[model.low_scale_key] x_low = x_low.to(memory_format=torch.contiguous_format).float() x_aug, noise_level = model.low_scale_model(x_low, noise_level) return x_aug, noise_level def paint(sampler, image, prompt, seed, scale, h, w, steps, num_samples=1, callback=None, eta=0., noise_level=None): device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu") model = sampler.model seed_everything(seed) prng = np.random.RandomState(seed) start_code = prng.randn(num_samples, model.channels, h , w) start_code = torch.from_numpy(start_code).to(device=device, dtype=torch.float32) print("Creating invisible watermark encoder (see https://github.com/ShieldMnt/invisible-watermark)...") wm = "SDV2" wm_encoder = WatermarkEncoder() wm_encoder.set_watermark('bytes', wm.encode('utf-8')) with torch.no_grad(),\ torch.autocast("cuda"): batch = make_batch_sd(image, txt=prompt, device=device, num_samples=num_samples) c = model.cond_stage_model.encode(batch["txt"]) c_cat = list() if isinstance(model, LatentUpscaleFinetuneDiffusion): for ck in model.concat_keys: cc = batch[ck] if exists(model.reshuffle_patch_size): assert isinstance(model.reshuffle_patch_size, int) cc = rearrange(cc, 'b c (p1 h) (p2 w) -> b (p1 p2 c) h w', p1=model.reshuffle_patch_size, p2=model.reshuffle_patch_size) c_cat.append(cc) c_cat = torch.cat(c_cat, dim=1) # cond cond = {"c_concat": [c_cat], "c_crossattn": [c]} # uncond cond uc_cross = model.get_unconditional_conditioning(num_samples, "") uc_full = {"c_concat": [c_cat], "c_crossattn": [uc_cross]} elif isinstance(model, LatentUpscaleDiffusion): x_augment, noise_level = make_noise_augmentation(model, batch, noise_level) cond = {"c_concat": [x_augment], "c_crossattn": [c], "c_adm": noise_level} # uncond cond uc_cross = model.get_unconditional_conditioning(num_samples, "") uc_full = {"c_concat": [x_augment], "c_crossattn": [uc_cross], "c_adm": noise_level} else: raise NotImplementedError() shape = [model.channels, h, w] samples, intermediates = sampler.sample( steps, num_samples, shape, cond, verbose=False, eta=eta, unconditional_guidance_scale=scale, unconditional_conditioning=uc_full, x_T=start_code, callback=callback ) with torch.no_grad(): x_samples_ddim = model.decode_first_stage(samples) result = torch.clamp((x_samples_ddim + 1.0) / 2.0, min=0.0, max=1.0) result = result.cpu().numpy().transpose(0, 2, 3, 1) * 255 st.text(f"upscaled image shape: {result.shape}") return [put_watermark(Image.fromarray(img.astype(np.uint8)), wm_encoder) for img in result] def run(): st.title("Stable Diffusion Upscaling") # run via streamlit run scripts/demo/depth2img.py sampler = initialize_model(sys.argv[1], sys.argv[2]) image = st.file_uploader("Image", ["jpg", "png"]) if image: image = Image.open(image) w, h = image.size st.text(f"loaded input image of size ({w}, {h})") width, height = map(lambda x: x - x % 64, (w, h)) # resize to integer multiple of 64 image = image.resize((width, height)) st.text(f"resized input image to size ({width}, {height} (w, h))") st.image(image) st.write(f"\n Tip: Add a description of the object that should be upscaled, e.g.: 'a professional photograph of a cat'") prompt = st.text_input("Prompt", "a high quality professional photograph") seed = st.number_input("Seed", min_value=0, max_value=1000000, value=0) num_samples = st.number_input("Number of Samples", min_value=1, max_value=64, value=1) scale = st.slider("Scale", min_value=0.1, max_value=30.0, value=9.0, step=0.1) steps = st.slider("DDIM Steps", min_value=2, max_value=250, value=50, step=1) eta = st.sidebar.number_input("eta (DDIM)", value=0., min_value=0., max_value=1.) noise_level = None if isinstance(sampler.model, LatentUpscaleDiffusion): # TODO: make this work for all models noise_level = st.sidebar.number_input("Noise Augmentation", min_value=0, max_value=350, value=20) noise_level = torch.Tensor(num_samples * [noise_level]).to(sampler.model.device).long() t_progress = st.progress(0) def t_callback(t): t_progress.progress(min((t + 1) / steps, 1.)) sampler.make_schedule(steps, ddim_eta=eta, verbose=True) if st.button("Sample"): result = paint( sampler=sampler, image=image, prompt=prompt, seed=seed, scale=scale, h=height, w=width, steps=steps, num_samples=num_samples, callback=t_callback, noise_level=noise_level, eta=eta ) st.write("Result") for image in result: st.image(image, output_format='PNG') if __name__ == "__main__": run()