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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="description" content="FLARE: Feed-forward Geometry, Appearance and Camera Estimation from Uncalibrated Sparse Views" />
<meta property="og:type" content="website" />
<meta property="og:title" content="FLARE" />
<meta property="og:description" content="FLARE: Feed-forward Geometry, Appearance and Camera Estimation from Uncalibrated Sparse Views" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta name="referrer" content="strict-origin-when-cross-origin" />
<meta property="og:video:width" content="1280" />
<meta property="og:video:height" content="720" />
<meta property="og:video:type" content="mp4" />
<!-- <meta name="twitter:card" content="summary_large_image" />
<meta property="twitter:domain" content="MaPa" />
<meta name="twitter:title" content="MaPa" />
<meta name="twitter:description" content="Text-driven Photorealistic Material Painting for 3D Shapes" /> -->
<meta name="application-name" content=" " />
<meta name="msapplication-TileColor" content="#FFFFFF" />
<meta name="msapplication-square70x70logo" content="favicon/mstile-70x70.png" />
<meta name="msapplication-square150x150logo" content="favicon/mstile-150x150.png" />
<meta name="msapplication-wide310x150logo" content="favicon/mstile-310x150.png" />
<meta name="msapplication-square310x310logo" content="favicon/mstile-310x310.png" />
<link rel="stylesheet" href="./assets/css/app-JSMVV36B.css" />
<link rel="stylesheet" href="./assets/css/inter.css" />
<title>FLARE</title>
<style>
body {
background-color: #fff;
color: #000;
}
body.dark {
background-color: #000;
color: #fff;
}
.selectSmallVideo {
filter: grayscale(100%) !important;
border-color: #fff !important;
z-index: 2 !important;
}
.dark {
background-color: #121212;
color: #e0e0e0;
}
.dark a {
color: #fff;
}
.dark .text-primary {
color: #fff;
}
.dark .text-secondary {
color: #fff;
text-opacity: 1;
}
.dark .hover\:text-primary:hover {
color: #fff;
text-opacity: 1;
}
.dark .bg-white {
background-color: #000;
}
.highlight {
background-color: yellow;
border: 1px dashed red;
padding: 5px;
margin: 10px 0;
}
.inline-list {
display: flex;
list-style-type: none;
padding: 0;
margin: 0;
}
.inline-list li {
margin-right: 20px;
}
.inline-list li:last-child {
margin-right: 0;
}
.underline {
text-decoration: underline;
}
</style>
</head>
<body class="bg-white day" style="overscroll-behavior: none">
<div class="flex w-full flex-col bg-white dark:bg-black">
<div class="mx-auto w-full max-w-4xl px-4 py-12 pb-10 md:px-8">
<div class="w-full flex flex-col justify-center items-center space-y-5 pb-10 rounded-lg">
<div class="w-full flex flex-col justify-center items-center space-y-5">
<h1 class="text-primary font-sans text-3xl xl:text-5xl text-center dark:text-white">
<b>FLARE</b>:
<!-- </h1>
<h2
class="text-primary font-sans text-xl font-medium xl:text-2xl text-center break-words px-2 max-w-[90%] dark:text-white"> -->
Feed-forward Geometry, Appearance and Camera Estimation from Uncalibrated Sparse Views
</h2>
<h2
class="text-primary font-sans text-xl font-medium xl:text-2xl text-center break-words px-2 max-w-[90%] dark:text-white">
CVPR 2025
</h2>
</div>
<div class="w-full flex flex-wrap justify-center items-center gap-5">
<a href="https://zhanghe3z.github.io/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Shangzhan
Zhang<sup>1,2*</sup></a><a href="https://jytime.github.io/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Jianyuan Wang<sup>3*</sup></a><a href="https://justimyhxu.github.io/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Yinghao Xu<sup>4*</sup><sup>†</sup></a>
<a href="https://xuenan.net/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Nan Xue<sup>2</sup></a>
</div>
<div class="w-full flex flex-wrap justify-center items-center gap-5">
<a href="https://chrirupp.github.io/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Christian Rupprecht<sup>3</sup></a>
<a href="https://www.xzhou.me/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Xiaowei Zhou<sup>1</sup><sup>†</sup></a>
<a href="https://shenyujun.github.io/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Yujun
Shen<sup>2</sup></a>
<a href="https://stanford.edu/~gordonwz/"
class="text-secondary font-sans cursor-pointer hover:text-primary dark:text-white dark:text-opacity-80 dark:hover:text-white dark:hover:text-opacity-100 transition duration-200 ease-in-out">Gordon Wetzstein<sup>4</sup></a>
</div>
<div class="row">
<ul class="inline-list text-secondary font-sans hover:text-primary dark:text-white">
<li> <sup>1</sup>Zhejiang University</li>
<li><sup>2</sup>Ant Group</li>
<li><sup>3</sup>University of Oxford</li>
<li><sup>4</sup>Stanford University</li>
</ul>
</div>
<div class="w-full flex flex-wrap justify-center items-center gap-5">
<a href="https://arxiv.org/abs/2502.12138"
target="_blank"
class="flex flex-row items-center space-x-2 rounded-full pl-2 pr-3 py-1 bg-black bg-opacity-70 hover:bg-opacity-80 transition duration-200 ease-in-out cursor-pointer dark:bg-white dark:bg-opacity-10 dark:hover:bg-opacity-20">
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class="fill-opacity-80"></path>
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d="M19.6203 21.2731L11.4472 11.9587L9.27579 9.47763L7.94409 10.6144C7.75352 10.7888 7.60199 10.9976 7.4985 11.2285C7.395 11.4594 7.34167 11.7075 7.34167 11.9583C7.34167 12.209 7.395 12.4572 7.4985 12.6881C7.60199 12.919 7.75352 13.1278 7.94409 13.3022L18.3098 22.7471C18.4008 22.8369 18.512 22.9065 18.635 22.9507C18.758 22.9949 18.8899 23.0127 19.0211 23.0027C19.2199 22.9996 19.4131 22.9404 19.5759 22.8326C19.7387 22.7249 19.8637 22.5735 19.9348 22.3981C19.9937 22.2011 19.9956 21.9928 19.9403 21.7949C19.885 21.597 19.7745 21.4168 19.6203 21.2731Z">
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</svg>
<span class="text-m text-white">Paper</span></a>
<a href="https://github.com/ant-research/FLARE"
target="_blank"
class="flex flex-row items-center space-x-2 rounded-full pl-2 pr-3 py-1 bg-black bg-opacity-70 hover:bg-opacity-80 transition duration-200 ease-in-out cursor-pointer dark:bg-white dark:bg-opacity-10 dark:hover:bg-opacity-20">
<svg width="24" height="24" viewBox="0 0 24 24" class="fill-white w-5 h-5">
<!-- xmlns="http://www.w3.org/2000/svg" -->
<path
d="M15.5221 23.9239C20.4308 22.3902 24 17.7347 24 12.2295C24 5.47535 18.6274 0 12 0C5.37258 0 0 5.47535 0 12.2295C0 17.825 3.68728 22.5428 8.72061 23.9968C9.16223 24.0298 9.32663 23.7163 9.32663 23.4441C9.32663 23.3219 9.32468 23.106 9.32206 22.8172C9.31903 22.4826 9.31512 22.05 9.31232 21.5519C6.3659 22.2241 5.74423 20.0601 5.74423 20.0601C5.26237 18.7752 4.56787 18.433 4.56787 18.433C3.60611 17.7424 4.64071 17.7561 4.64071 17.7561C5.70392 17.8353 6.26316 18.903 6.26316 18.903C7.20801 20.6031 8.74268 20.112 9.34614 19.8279C9.44238 19.1086 9.7155 18.6181 10.0185 18.3401C7.66646 18.0594 5.19344 17.1044 5.19344 12.8407C5.19344 11.6261 5.60637 10.6329 6.28397 9.85492C6.17472 9.57349 5.81121 8.44231 6.38736 6.91017C6.38736 6.91017 7.27694 6.61098 9.30062 8.05091C10.1453 7.80432 11.0518 7.68068 11.9525 7.67658C12.8518 7.68068 13.7583 7.80432 14.6043 8.05091C16.6267 6.61098 17.5143 6.91017 17.5143 6.91017C18.0924 8.44231 17.7289 9.57349 17.6197 9.85492C18.2986 10.6329 18.7089 11.6261 18.7089 12.8407C18.7089 17.1154 16.232 18.056 13.8721 18.3312C14.2525 18.6748 14.5913 19.3538 14.5913 20.3921C14.5913 21.3866 14.5855 22.2528 14.5816 22.8266C14.5797 23.1102 14.5783 23.3234 14.5783 23.4441C14.5783 23.7419 14.7688 24.0882 15.3066 23.9796C15.3755 23.9554 15.4474 23.937 15.5221 23.9239Z">
</path>
</svg>
<span class="text-m text-white">Code</span></a>
<a href="https://huggingface.co/spaces/zhang3z/FLARE"
target="_blank"
class="flex flex-row items-center space-x-2 rounded-full pl-2 pr-3 py-1 bg-black bg-opacity-70 hover:bg-opacity-80 transition duration-200 ease-in-out cursor-pointer dark:bg-white dark:bg-opacity-10 dark:hover:bg-opacity-20">
<span class="text-m text-white">🤗 Hugging Face</span></a>
<a href="./videos/teaser_video.mp4"
target="_blank"
class="flex flex-row items-center space-x-2 rounded-full pl-2 pr-3 py-1 bg-black bg-opacity-70 hover:bg-opacity-80 transition duration-200 ease-in-out cursor-pointer dark:bg-white dark:bg-opacity-10 dark:hover:bg-opacity-20">
<svg
width="24"
height="24"
viewBox="0 0 24 24"
class="fill-white w-5 h-5"
xmlns="http://www.w3.org/2000/svg"
>
<path
d="M12.0136 20H11.9916C11.9235 20 5.10583 19.9872 3.38575 19.5322C2.43989 19.284 1.70122 18.5641 1.44695 17.6427C1.13764 15.9432 0.988277 14.2196 1.00072 12.4936C0.992726 10.7647 1.14613 9.03873 1.45904 7.33693C1.7203 6.41469 2.45573 5.6915 3.40004 5.4282C5.07285 5 11.7026 5 11.9839 5H12.007C12.0763 5 18.9115 5.01285 20.614 5.46781C21.5579 5.71725 22.2951 6.43566 22.5506 7.35512C22.8698 9.06103 23.0196 10.7929 22.998 12.5268C23.0057 14.2535 22.8519 15.9774 22.5385 17.677C22.281 18.5972 21.5418 19.3155 20.5964 19.5643C18.9258 19.9957 12.295 20 12.0136 20ZM9.81544 9.2874L9.80995 15.7105L15.5384 12.4989L9.81544 9.2874Z"
></path></svg>
<span class="text-m text-white">Video</span>
</a>
</div>
</div>
<div class="pt-2">
<div class="pt-4" style="filter: none">
<div class="relative w-full" style="padding-top: 56.25%">
<video id="mainVideo" autoplay="" loop="" playsinline="" muted=""
class="absolute top-0 left-0 w-full h-full" style="
z-index: 1;
object-fit: cover;
border-radius: 0.5rem;
transform: scale(1);
">
<source src="./videos/teaser_video.mp4" type="video/mp4" data-src="./videos/teaser_video.mp4" />
</video>
<video id="blurVideo" autoplay="" loop="" playsinline="" muted=""
class="absolute top-0 left-0 w-full h-full" style="
z-index: 0;
object-fit: cover;
border-radius: 0.5rem;
transform: scale(1.03);
filter: blur(25px);
">
<source src="./videos/teaser_video.mp4" type="video/mp4" data-src="./videos/teaser_video.mp4" />
</video>
</div>
<div class="space-y-3 pt-16" id="Overview">
<h1 class="text-primary font-sans text-xl font-bold dark:text-white">
Overview
</h1>
<hr class="hr">
<p class="text-justify block font-normal"></p>
<p class="font-normal text-primary dark:text-white block text-justify">
<span>We present FLARE, a feed-forward model designed to infer high-quality camera poses and 3D geometry from uncalibrated sparse-view images (<i>i.e.</i>, as few as 2-8 inputs), which is a challenging yet practical setting in real-world applications.
Our solution features a cascaded learning paradigm with camera pose serving as the critical bridge, recognizing its essential role in mapping 3D structures onto 2D image planes.
Concretely, FLARE starts with camera pose estimation, whose results condition the subsequent learning of geometric structure and appearance, optimized through the objectives of geometry reconstruction and novel-view synthesis.
Utilizing large-scale public datasets for training, our method delivers state-of-the-art performance in the tasks of pose estimation, geometry reconstruction, and novel view synthesis, while maintaining the inference efficiency (<i>i.e.</i>, less than 0.5 seconds).
</span>
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Pipeline
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<span>Given uncalibrated sparse views, our model can infer high-quality camera poses, geometry and appearance in a single feed-forward pass. We use camera poses as proxies to guide subsequent geometry and appearance learning. Given initial pose estimates, we first compute camera-centric geometry, then project it into a global scene representation. Finally, we form 3D Gaussians on top of the scene geometry to enable photo-realistic novel-view synthesis.
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<h1 class="text-primary font-sans text-xl font-bold dark:text-white">
Pose Estimation and Point Cloud Reconstruction
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Novel View Synthesis (512x512)
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<h1 class="text-primary font-sans text-xl font-bold dark:text-white">
Novel View Synthesis (256x256)
</h1>
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<h1 class="text-primary font-sans text-xl font-bold dark:text-white">
Citation
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<span>@misc{zhang2025FLARE,</span><br>
<span class="pl-12">title =</span><span>{FLARE: Feed-forward Geometry, Appearance and Camera Estimation from Uncalibrated Sparse Views},</span>
<span class="pl-12">author =</span><span>{Shangzhan Zhang and Jianyuan Wang and Yinghao Xu and Nan Xue and Christian Rupprecht and Xiaowei Zhou and Yujun Shen and Gordon Wetzstein},</span>
<span class="pl-12">year =</span><span>{2025},</span>
<span class="pl-12">eprint =</span><span>{2502.12138},</span>
<span class="pl-12">archivePrefix =</span><span>{arXiv},</span>
<span class="pl-12">primaryClass =</span><span>{cs.CV}</span>
<span>}</span>
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</div>
<div class="space-y-3 pt-16" id="Acknowledgements">
<h1 class="text-primary font-sans text-xl font-bold dark:text-white">
Acknowledgements
</h1>
<hr class="hr">
<p class="text-primary text-justify block font-normal dark:text-white"></p>
<p class="font-normal text-primary dark:text-white block text-justify">
<span>We gratefully acknowledge Tao Xu for his assistance with the evaluation, Yuanbo Xiangli for insightful discussions, and Xingyi He for his Blender visualization code. The webpage template is borrowed from
<a href="https://signerf.jdihlmann.com/" target="_blank">https://signerf.jdihlmann.com/</a><!-- -->
</span>
</p>
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