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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8">
<meta name="description"
content="This is the supplementary webpage for NeurIPS submission -- 4Real: Towards Photorealistic 4D Scene Generation via Video Diffusion Models.">
<meta name="keywords" content="Gaussian Splatting, Dynamic novel view synthesis, 4Real, text-video generation, 4D generation, scene generation">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>4Real: Towards Photorealistic 4D Scene Generation via Video Diffusion Models</title>
<link href="https://fonts.googleapis.com/css?family=Google+Sans|Noto+Sans|Castoro"
rel="stylesheet">
<link rel="stylesheet" href="./static/css/bulma.min.css">
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position: absolute;
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margin: 0 auto; /* Center the div within its container */
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display: block;
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color: white;
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</style>
</head>
<body>
<!-- <section class="hero"> -->
<section>
<div class="hero-body">
<div class="container is-max-desktop">
<div class="columns is-centered">
<div class="column has-text-centered">
<h1 class="title is-1 publication-title"><span class="artistic2">4</span><span class="artistic">Real</span> Towards Photorealistic 4D Scene Generation via Video Diffusion Models </h1>
<div class="is-size-3 publication-authors">
<span class="author-block">
<a href="https://heng14.github.io/">Heng Yu</a><sup>*,1</sup>,</span>
<span class="author-block">
<a href="https://mightychaos.github.io/">Chaoyang Wang</a><sup>*,1</sup>,</span>
<span class="author-block">
<a href="https://payeah.net/">Peiye Zhuang</a><sup>1</sup>,</span>
<span class="author-block">
<a href="https://www.willimenapace.com/">Willi Menapace</a><sup>1</sup>,</span>
<span class="author-block">
<a href="https://aliaksandrsiarohin.github.io/aliaksandr-siarohin-website/">Aliaksandr Siarohin</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="https://research.snap.com/team/team-member.html#junli-cao">Junli Cao</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="https://www.laszlojeni.com/">László A. Jeni,</a><sup>2</sup>,
</span>
<span class="author-block">
<a href="http://www.stulyakov.com/">Sergey Tulyakov</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="http://hsinyinglee.com/">Hsin-Ying Lee</a><sup>1</sup>,
</span>
</div>
<div class="is-size-3 publication-authors">
<span class="author-block"><sup>1</sup>Snap Inc.,</span>
<span class="author-block"><sup>2</sup>Carnegie Mellon University</span>
</div>
<div class="column has-text-centered">
<div class="publication-links">
<!-- PDF Link. -->
<span class="link-block">
<a href="https://arxiv.org/abs/2406.07472"
class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fas fa-file-pdf"></i>
</span>
<span>Paper</span>
</a>
</span>
<!-- Video Link. -->
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<span>Code</span>
</a>
</span> -->
</div>
</div>
</div>
</div>
</div>
<!-- <center>
<div class="gif-container">
<img src="resources/racoon_sync.gif" alt="Example GIF" style="width: 800px;">
<div class="hover-text">A hamster wearing virtual reality headsets is a DJ in a disco.</div>
</div>
</center> -->
<center>
<div class="video-container">
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<div class="hover-text">A hamster wearing virtual reality headsets is a DJ in a disco.</div>
</div>
</center>
<center>
<div class="video-container">
<video class='round' autoplay muted loop playsinline style='height:144px' src='resources/ours_mv/repo_0509_debug_multiview_video29_Frm000_16-mv.mp4'></video>
<div class="hover-text">A bulldog wearing a black pirate hat eating candy.</div>
</div>
</center>
<center>
<div class="video-container">
<video class='round' autoplay muted loop playsinline style='height:144px' src='resources/ours_mv/repo_0509_debug_multiview_video35_Frm000_2-mv.mp4'></video>
<div class="hover-text">A cat eating chicken and watching TV.</div>
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</center>
<center>
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<video class='round' autoplay muted loop playsinline style='height:144px' src='resources/ours_mv/repo_0509_debug_multiview_video4_Frm000_3-mv.mp4'></video>
<div class="hover-text">A crocodile playing drum.</div>
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<center>
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<div class="hover-text">Time lapse of a flower blooming open.</div>
</div>
</center>
<center>
<div class="column has-text-centered">
<p>
<b>4Real</b> generates 4D gaussian splatting from input text prompts, and renders dynamic scene that can be viewed from different view points.
</p>
<p> (Hover on a video to see the prompt.)
</p>
</div>
</center>
</section>
<!-- <section class="section"> -->
<section>
<!-- Abstract. -->
<div class="columns is-centered has-text-centered" width=1000px>
<div class="column is-four-fifths">
<h2 class="title is-3">Abstract</h2>
<div class="content has-text-justified">
<p>
Existing dynamic scene generation methods mostly rely on distilling knowledge from pre-trained 3D generative models, which are typically fine-tuned on synthetic object datasets.
As a result, the generated scenes are often object-centric and lack photorealism.
To address these limitations, we introduce a novel pipeline designed for photorealistic text-to-4D scene generation, discarding the dependency on multi-view generative models and instead fully utilizing video generative models trained on diverse real-world datasets.
Our method begins by generating a reference video using the video generation model.
We then learn the canonical 3D representation of the video using a freeze-time video, delicately generated from the reference video.
To handle inconsistencies in the freeze-time video, we jointly learn a per-frame deformation to model these imperfections.
We then learn the temporal deformation based on the canonical representation to capture dynamic interactions in the reference video.
The pipeline facilitates the generation of dynamic scenes with enhanced photorealism and structural integrity, viewable from multiple perspectives, thereby setting a new standard in 4D scene generation.
</p>
</div>
</div>
</div>
<!--/ Abstract. -->
<div>
<center>
<video class='round' autoplay muted loop playsinline style='width:800px' src='resources/teaser-1080p.mp4'>
</center>
</div>
</section>
<!-- <section class="hero is-light is-small"> -->
<section>
<div>
<center><h3 class="title is-3">Space-time view synthesis from generated 4D Gaussian splats</h3></center>
</div>
<div class="hero-body">
<div class="container">
<div id="myCarousel" class="carousel slide">
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<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
<li data-target="#myCarousel" data-slide-to="1"></li>
</ol>
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<div class="carousel-inner">
<div class="item active">
<table align=center width=900px>
<tr>
<td>
<center>
<video class='round' autoplay muted loop playsinline style='width:220px' src='resources/goodvideos_144/repo_0508_debug_multiview_video17_Frm000_10.mp4'></video>
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</center>
</td>
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<center>
<video class='round' autoplay muted loop playsinline style='width:220px' src='resources/goodvideos_144/A_cat_singing.mp4'></video>
</center>
</td>
<td>
<center>
<video class='round' autoplay muted loop playsinline style='width:220px' src='resources/goodvideos_144/teddy_sample_demo.mp4'></video>
</center>
</td>
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