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import gradio as gr |
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from PIL import Image |
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from torchvision.transforms import Compose, ToTensor, Resize, Normalize |
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import numpy as np |
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import imageio |
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import tempfile |
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from utils.utils import denorm |
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from model.hub import MultiInputResShiftHub |
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import torch |
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device = torch.device("cuda" if torch.cuda.is_available() else "cpu") |
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model = MultiInputResShiftHub.from_pretrained("vfontech/Multiple-Input-Resshift-VFI") |
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model.requires_grad_(False).to(device).eval() |
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transform = Compose([ |
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Resize((256, 448)), |
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ToTensor(), |
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Normalize(mean=[0.5]*3, std=[0.5]*3), |
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]) |
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def to_numpy(img_tensor: torch.Tensor) -> np.ndarray: |
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img_np = denorm(img_tensor, mean=[0.5]*3, std=[0.5]*3).squeeze().permute(1, 2, 0).cpu().numpy() |
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img_np = np.clip(img_np, 0, 1) |
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return (img_np * 255).astype(np.uint8) |
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def interpolate(img0_pil: Image.Image, |
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img2_pil: Image.Image, |
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tau: float=0.5, |
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num_samples: int=1) -> tuple: |
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img0 = transform(img0_pil.convert("RGB")).unsqueeze(0).to(device) |
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img2 = transform(img2_pil.convert("RGB")).unsqueeze(0).to(device) |
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try: |
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if num_samples == 1: |
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img1 = model.reverse_process([img0, img2], tau) |
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return Image.fromarray(to_numpy(img1)), None |
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else: |
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frames = [to_numpy(img0)] |
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for t in np.linspace(0, 1, num_samples): |
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img = model.reverse_process([img0, img2], float(t)) |
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frames.append(to_numpy(img)) |
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frames.append(to_numpy(img2)) |
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temp_path = tempfile.NamedTemporaryFile(suffix=".mp4", delete=False).name |
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imageio.mimsave(temp_path, frames, fps=8) |
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return None, temp_path |
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except Exception as e: |
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print(f"Error during interpolation: {e}") |
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return None, None |
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def build_demo() -> gr.Blocks: |
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header = """ |
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<div style="text-align: center; padding: 1.5rem 0;"> |
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<h1 style="font-size: 2.4rem; margin-bottom: 0.5rem;">🎞️ Multi-Input ResShift Diffusion VFI</h1> |
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<p style="font-size: 1.1rem; color: #444;"> |
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Efficient and stochastic video frame interpolation for hand-drawn animation. |
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</p> |
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<div style="display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin: 1rem 0;"> |
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<a href="https://arxiv.org/pdf/2504.05402"> |
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<img src="https://img.shields.io/badge/arXiv-Paper-A42C25.svg" alt="arXiv"> |
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</a> |
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<a href="https://huggingface.co./vfontech/Multiple-Input-Resshift-VFI"> |
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<img src="https://img.shields.io/badge/🤗-Model-ffbd45.svg" alt="HF"> |
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</a> |
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<a href="https://colab.research.google.com/drive/1MGYycbNMW6Mxu5MUqw_RW_xxiVeHK5Aa#scrollTo=EKaYCioiP3tQ"> |
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<img src="https://img.shields.io/badge/Colab-Demo-green.svg" alt="Colab"> |
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</a> |
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<a href="https://github.com/VicFonch/Multi-Input-Resshift-Diffusion-VFI"> |
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<img src="https://img.shields.io/badge/GitHub-Code-blue.svg?logo=github" alt="GitHub"> |
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</a> |
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</div> |
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<div style="max-width: 700px; margin: 0 auto; font-size: 0.96rem; color: #333;"> |
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<p style="margin-bottom: 0.5rem;"><strong>Usage:</strong></p> |
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<ul style="list-style-type: none; padding: 0; line-height: 1.6;"> |
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<li>All images are resized to <strong>256×448</strong>.</li> |
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<li>If <code>Number of Samples = 1</code>, generates a single interpolated frame using Tau.</li> |
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<li>If <code>Number of Samples > 1</code>, Tau is ignored and a full interpolation sequence is generated.</li> |
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</ul> |
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</div> |
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</div> |
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""" |
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with gr.Blocks() as demo: |
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gr.HTML(header) |
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with gr.Row(): |
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img0 = gr.Image(type="pil", label="Initial Image (frame1)") |
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img2 = gr.Image(type="pil", label="Final Image (frame3)") |
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with gr.Row(): |
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tau = gr.Slider(0.0, 1.0, step=0.05, value=0.5, label="Tau Value (only if Num Samples = 1)") |
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samples = gr.Slider(1, 20, step=1, value=1, label="Number of Samples") |
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btn = gr.Button("Generate") |
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with gr.Row(): |
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output_img = gr.Image(label="Interpolated Image (if num_samples = 1)") |
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output_vid = gr.Video(label="Interpolation in video (if num_samples > 1)") |
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btn.click(interpolate, inputs=[img0, img2, tau, samples], outputs=[output_img, output_vid]) |
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gr.Examples( |
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examples=[ |
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["_data/example_images/frame1.png", "_data/example_images/frame3.png", 0.5, 1], |
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], |
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inputs=[img0, img2, tau, samples], |
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) |
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return demo |
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if __name__ == "__main__": |
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demo = build_demo() |
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demo.launch(server_name="0.0.0.0", ssr_mode=False) |
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