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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="description"
content="FastGS: Training 3D Gaussian Splatting in 100 Seconds">
<meta name="keywords" content="FastGS">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>FastGS</title>
<!-- <link href="https://fonts.googleapis.com/css?family=Google+Sans|Noto+Sans|Castoro"
rel="stylesheet"> -->
<link href="./static/css/googlefonts.css" rel="stylesheet">
<link rel="stylesheet" href="./static/css/bulma.min.css">
<link rel="stylesheet" href="./static/css/bulma-carousel.min.css">
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<link rel="stylesheet" href="./static/css/index.css">
<!-- <link rel="stylesheet" href="css/bootstrap.min.css"> -->
<!-- Favicon: Lightning bolt for "fast" acceleration -->
<link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%234D7CFE'><path d='M13 2L3 14h9l-1 8 10-12h-9l1-8z'/></svg>" type="image/svg+xml">
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<script src="./static/js/video_comparison.js"></script>
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src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/MathJax.js?config=TeX-MML-AM_CHTML">
</script>
<script type="text/x-mathjax-config">
MathJax.Hub.Config({
tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]},
});
</script>
</head>
<body>
<style>
.publication-title {
font-family: 'Poppins', 'Segoe UI', sans-serif;
text-align: center;
font-weight: 700;
letter-spacing: 1px;
font-size: 3rem;
background: linear-gradient(120deg, #6BCBFF, #4D7CFE, #9B5DE5);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent; /* Chrome, Edge, Safari */
background-clip: text; /* Firefox */
color: #6BCBFF; /* fallback 色，确保可见 */
animation: coolFlow 6s ease infinite;
}
/* H2 冷色渐变稍深 */
h2.publication-title {
font-size: 1.8rem;
font-weight: 600;
background: linear-gradient(120deg, #4D7CFE, #3A0CA3, #00B4D8);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
color: #4D7CFE; /* fallback */
animation: coolFlow 7s ease infinite;
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/* 渐变流动动画 */
@keyframes coolFlow {
0% { background-position: 0% 50%; }
50% { background-position: 100% 50%; }
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}
</style>
<section class="hero">
<div class="hero-body", style="padding-bottom: 0rem;">
<div class="container is-max-desktop">
<div class="columns is-centered">
<div class="column has-text-centered">
<h1 class="title is-1 publication-title">FastGS</h1>
<h2 class="title is-2 publication-title">Training 3D Gaussian Splatting in 100 Seconds</h2>
<h3 class="title is-4 publication-title" style="color:#ff6f61;">
CVPR 2026 Highlight
</h3>
<div class="is-size-5 publication-authors">
<span class="author-block">
<a href="https://shiwei-ren.github.io/">Shiwei Ren<sup>*</sup></a>
<a href="https://tianci-wen.github.io/">Tianci Wen<sup>*</sup></a>
<a href="https://nankai.teacher.360eol.com/teacherBasic/preview?teacherId=10244">Yongchun Fang<sup>†</sup></a>
</span>
</div>
<div class="is-size-5 publication-authors">
<span class="author-block", style="color:#726f6f">Nankai University </span>
</div>
<div class="is-size-5 publication-authors">
<span class="author-block", style="font-size: 15px;color:#726f6f">renshiwei, wentc@mail.nankai.edu.cn </span>
<span class="author-block", style="font-size: 15px;color:#726f6f">fangyc@nankai.edu.cn </span>
</div>
<div class="is-size-5 publication-authors">
<span class="author-block", style="font-size: 15px;color:#726f6f"><sup>* </sup>Equal contribution <sup>†</sup> Corresponding author </span>
</div>
<div class="column has-text-centered">
<div class="publication-links">
<span class="link-block">
<a href="https://arxiv.org/abs/2511.04283"
class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="ai ai-arxiv"></i>
</span>
<span>arXiv</span>
</a>
</span>
<span class="link-block">
<a href="https://github.com/fastgs/FastGS"
class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fab fa-github"></i>
</span>
<span>github</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/Goodsleepeverday/fastgs"
class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fas fa-cube"></i>
</span>
<span>Pre-trained model</span>
</a>
</span>
</div>
</div>
</div>
</div>
</div>
</section>
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column is-four-fifths">
<h2 class="title is-3" style="color:#5fb8ff;">1. What is FastGS?</h2>
</div>
</div>
<div class="content has-text-justified">
<p class="tldr-box">
TL;DR: FastGS is a new, simple, and general acceleration framework for 3D Gaussian Splatting (3DGS). It enables training a scene in about <span class="highlight">100 seconds</span> while maintaining comparable rendering quality.
</p>
<p>
The core idea is to combine multi-view consistent <span class="highlight">densification</span> and targeted <span class="highlight">pruning</span>, which together reduce unnecessary computation while preserving visual fidelity.
</p>
<ul class="summary-list">
<li><strong>Fast:</strong> 2–7× training acceleration across varied backbones.</li>
<li><strong>Accurate:</strong> Comparable or better rendering quality versus prior Gaussian-based methods.</li>
<li><strong>Versatile:</strong> Applicable to dynamic scenes, surface reconstruction, sparse-view setups, large-scale reconstruction and SLAM.</li>
</ul>
</div>
</div>
</section>
<section class="section">
<div class="container" style="max-width: 1200px;">
<div class="columns is-centered has-text-centered">
<div class="column is-four-fifths">
<h2 class="title is-3" style="color:#5fb8ff;">2. Training Process Visualization</h2>
<p>
We demonstrate how FastGS accelerates the training process of different backbones on various scenes.
</p>
<hr style="margin: 1.5rem auto; width: 100%; border-top: 1px solid rgba(120,180,255,0.3);">
<!-- 2.1 Outperform SOTA -->
<h3 class="title is-4" style="color:#66ccff;">2.1 Outperform SOTA</h3>
<p style="margin-bottom: 1rem;">
FastGS surpasses state-of-the-art Gaussian-based rendering methods in both reconstruction quality and training speed.
</p>
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless sota-tabs">
<li><a href="#truck">Truck</a></li>
<li><a href="#train">Train</a></li>
<li><a href="#stump">Stump</a></li>
<li><a href="#bicycle">Bicycle</a></li>
<li><a href="#room">Room</a></li>
<li><a href="#counter">Counter</a></li>
<li><a href="#bonsai">Bonsai</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (3DGS-accel) with FastGS.
<br>Fullscreen the videos to view better.
</div>
<!-- 2.1 视频内容 -->
<div id="truck" class="sota-content active">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/truck-h264.mp4" type="video/mp4">
</video>
</div>
<div id="train" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/train-h264.mp4" type="video/mp4">
</video>
</div>
<div id="stump" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/stump-h264.mp4" type="video/mp4">
</video>
</div>
<div id="bicycle" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/bicycle-h264.mp4" type="video/mp4">
</video>
</div>
<div id="room" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/room-h264.mp4" type="video/mp4">
</video>
</div>
<div id="counter" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/counter-h264.mp4" type="video/mp4">
</video>
</div>
<div id="bonsai" class="sota-content">
<video autoplay controls muted playsinline width="100%" style="border-radius:10px;">
<source src="./static/videos/static/bonsai-h264.mp4" type="video/mp4">
</video>
</div>
<hr style="margin: 2rem auto; width: 50%; border-top: 1px solid rgba(120,180,255,0.3);">
<!-- 2.2 Enhancing Baselines -->
<h3 class="title is-4" style="color:#66ccff;">2.2 Enhancing Baselines</h3>
<p style="margin-bottom: 1rem;">
Integrating FastGS into various baseline architectures significantly accelerates their training process.
</p>
<!-- 冷色系导航 tabs -->
<style>
.nav-list {
list-style: none;
padding: 0;
display: flex;
gap: 20px;
max-width: 900px;
flex-wrap: wrap;
font-family: 'Poppins', sans-serif;
justify-content: center;
margin-bottom: 1rem;
}
.nav-list li a {
font-weight: 600;
font-size: 1.1rem;
text-decoration: none;
background: linear-gradient(120deg, #00C9FF, #92FE9D, #7F7FD5);
background-size: 200% 200%;
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
transition: all 0.3s ease;
}
.nav-list li a:hover {
background-position: 100% 50%;
transform: scale(1.05);
text-shadow: 0 0 8px rgba(80,180,255,0.4);
}
.sota-content,
.baseline-content {
display: none;
margin-top: 1rem;
}
.sota-content.active,
.baseline-content.active {
display: block;
}
video {
border-radius: 10px;
width: 100%;
}
</style>
<!-- 2.2 Tabs -->
<!-- ====== Top-level baseline tabs (保持与你页面里位置一致) ====== -->
<div class="tabs is-centered">
<ul class="nav-list baseline-tabs">
<li class="is-active"><a href="#static-recon">Static Scene Reconstruction</a></li>
<li><a href="#dynamic-recon">Dynamic Scene Reconstruction</a></li>
<li><a href="#sparseview-recon">Sparse-view Reconstruction</a></li>
<li><a href="#surface-recon">Surface Reconstruction</a></li>
<li><a href="#large-recon">Large-scale Reconstruction</a></li>
<li><a href="#slam-recon">SLAM</a></li>
</ul>
</div>
<style>
/* 覆盖 Bulma 默认激活样式 */
.tabs.is-toggle li.is-active a {
background: none !important; /* 去掉蓝底 */
color: #070b0e !important; /* 字体颜色改成柔和蓝，可改成其他色 */
font-weight: normal !important; /* 去掉加粗 */
box-shadow: none !important; /* 去掉阴影 */
border: 2px solid #eaf1f5 !important; /* 显示边框，颜色可改 */
border-radius: 8px; /* 圆角，保持原先风格 */
padding: 0.25rem 0.75rem; /* 内边距，看起来像按钮 */
}
</style>
<div class="tabs-content baseline-group">
<!-- Static -->
<div id="static-recon" class="baseline-section">
<div class="tabs-widget">
<!-- 内层 tabs -->
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="static-recon">
<li class="is-active"><a href="#static-treehill">Treehill</a></li>
<li><a href="#static-playroom">Playroom</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (Mip-Splatting) with FastGS.
</div>
<div class="inner-content" id="static-trucks">
<div class="item item-mip-treehill active" data-video-id="id-mip-treehill">
<video poster="" id="id-mip-treehill" autoplay controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/mip/mip-treehill-h264.mp4" type="video/mp4">
</video>
</div>
<div class="item item-mip-playroom" data-video-id="id-mip-playroom" style="display: none;">
<video poster="" id="id-mip-playroom" autoplay controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/mip/mip-playroom-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
<!-- Dynamic -->
<div id="dynamic-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="dynamic-recon">
<li class="is-active"><a href="#dynamic-cook">Cook_spinach</a></li>
<li><a href="#dynamic-salmon">Flame_salmon</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (Deformable-3DGS) with FastGS.
</div>
<div class="inner-content" id="dynamic-trucks">
<div class="item item-dynamic-cook" data-video-id="id-dynamic-cook">
<video poster="" id="id-dynamic-cook" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/dynamic/dynamic-cook-h264.mp4" type="video/mp4">
</video>
</div>
</div>
<div class="inner-content" id="dynamic-trucks">
<div class="item item-dynamic-salmon" data-video-id="id-dynamic-salmon">
<video poster="" id="id-dynamic-salmon" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/dynamic/dynamic-salmon-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
<!-- Sparse -->
<div id="sparseview-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="sparseview-recon">
<li class="is-active"><a href="#sparse-fern">Fern (6 views)</a></li>
<li><a href="#sparse-trex">Trex (6 views)</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (DropGaussian) with FastGS.
</div>
<div class="inner-content" id="sparse-trucks">
<div class="item item-sparse-fern" data-video-id="id-sparse-fern">
<video poster="" id="id-sparse-fern" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/sparse/sparse_fern-h264.mp4" type="video/mp4">
</video>
</div>
</div>
<div class="inner-content" id="sparse-trucks">
<div class="item item-sparse-trex" data-video-id="id-sparse-trex">
<video poster="" id="id-sparse-trex" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/sparse/sparse_trex-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
<!-- Surface -->
<div id="surface-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="surface-recon">
<li class="is-active"><a href="#surface-truck">Truck</a></li>
<li><a href="#surface-ignatius">Ignatius</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (PGSR) with FastGS.
</div>
<div class="inner-content" id="surface-trucks">
<div class="item item-surface-truck" data-video-id="id-surface-truck">
<video poster="" id="id-surface-truck" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/surface/surface_truck-h264.mp4" type="video/mp4">
</video>
</div>
</div>
<div class="inner-content" id="surface-trucks">
<div class="item item-surface-ignatius" data-video-id="id-surface-ignatius">
<video poster="" id="id-surface-ignatius" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/surface/surface_ignatius-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
<!-- Sparse -->
<!-- <div id="sparseview-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="sparseview-recon">
<li class="is-active"><a href="#sparse-truck">Truck</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (Sparse) with CodeName.
</div>
<div class="inner-content" id="sparse-trucks">
<div class="item item-comp-sparse-truck" data-video-id="id-comp-sparse-truck">
<video poster="" id="id-comp-sparse-truck" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/static/bonsai-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div> -->
<!-- Large -->
<!-- <div id="large-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="large-recon">
<li class="is-active"><a href="#large-truck">Truck</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (Large) with CodeName.
</div>
<div class="inner-content" id="large-trucks">
<div class="item item-comp-large-truck" data-video-id="id-comp-large-truck">
<video poster="" id="id-comp-large-truck" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/static/bonsai-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div> -->
<!-- SLAM -->
<!-- <div id="slam-recon" class="baseline-section" style="display:none;">
<div class="tabs-widget">
<div class="tabs is-centered is-toggle is-toggle-rounded is-small">
<ul class="is-marginless inner-tabs" data-section="slam-recon">
<li class="is-active"><a href="#slam-truck">Truck</a></li>
</ul>
</div>
<div class="content has-text-centered is-size-7-mobile">
'Ours' denotes enhancing the backbone (SLAM) with CodeName.
</div>
<div class="inner-content" id="slam-trucks">
<div class="item item-comp-slam-truck" data-video-id="id-comp-slam-truck">
<video poster="" id="id-comp-slam-truck" controls muted playsinline width="100%" style="border-radius: 10px;">
<source src="./static/videos/static/bonsai-h264.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div> -->
</div>
<!-- ====== JS: 主切换 + 内层切换 + 每个视频结束后停2s重播 ====== -->
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<!-- JS 控制两个独立 tab 组 -->
<script>
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</div>
</div>
</div>
</section>
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<!-- <section class="section">
<section class="container">
<div class="content">
<p class="title is-3 has-text-centered">
Tour over the Optimized Scenes
</p>
<div class="columns is-centered has-text-centered">
<div class="column is-one-third">
<div class="video-compare-container" id="materialsDiv1">
<video class="video" id="materials1" loop playsinline autoPlay muted src="./static/videos/treehill_cat_720p_text_batch.mp4" onplay="resizeAndPlay(this)"></video>
<canvas height=0 class="videoMerge" id="materials1Merge" style="border-radius: 10px;"></canvas>
</div>
</div>
<div class="column is-one-third">
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</div>
</div>
</div>
<p class="subtitle has-text-centered">
Please click the videos to fullscreen for better view.
</p>
</div>
</section>
</section> -->
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column">
<h2 class="title is-3" style="color:#5fb8ff;">3. Method Overview</h2>
<img alt="Architecture" src="./static/images/pipeline.png" width="100%"/>
</div>
</div>
<div class="content has-text-justified">
<span class="kicker" style="text-align: center; display: block;">Pipeline</span>
<p class>
The FastGS pipeline rethinks importance estimation for Gaussians using multi-view consistency. We sample training views and build per-pixel L1 loss maps to evaluate how each Gaussian contributes across views.
</p>
<p>
Key components:
</p>
<ul class="summary-list">
<li><strong> ADC redesign:</strong> compute a <span class="highlight">multi-view score</span> for each Gaussian by counting high-error pixels inside its 2D footprint — this drives densification and pruning.</li>
</ul>
<p>
Other SOTA 3DGS methods:
</p>
<ul class="summary-list">
<li><strong>(a) Taming-3DGS:</strong> estimates importance from per-Gaussian properties aggregated across sampled views — this can produce a larger number of <span class="issue">redundant Gaussians</span>, increasing memory and compute cost.</li>
<li><strong>(b) Speedy-Splat:</strong> computes Gaussian scores by accumulating Hessian-like approximations over training views, which may <span class="issue">harm rendering fidelity</span>.</li>
</ul>
<p>
The figure shows densification (from 0.5K to 15K iterations) on the left and pruning results (achieved using Speedy-Splat's pruning strategy and VCP on vanilla 3DGS) on the right, illustrating how FastGS preserves quality while reducing compute.
</p>
</div>
</div>
</section>
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column">
<h2 class="title is-3" style="color:#5fb8ff;">4. FastGS Improving SOTA</h2>
<div class="content has-text-justified">
<p class>
Quantitative comparisons show that FastGS completes 3DGS training in about <span class="highlight">100 seconds</span> on average while keeping rendering quality comparable to prior fast-optimization methods.
</p>
<ul class="summary-list">
<li><strong>FastGS-Big:</strong> achieves the best rendering quality among tested methods and still trains faster than the previous SOTA.</li>
<li><strong>Measurements:</strong> time is reported in minutes for easier comparison across methods.</li>
</ul>
</div>
<img alt="Architecture" src="./static/images/result.png" width="100%"/>
</div>
</div>
</div>
</section>
<!-- <section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column">
<h2 class="title is-3">DashGaussian Enhancing Backbones</h2>
<div class="content has-text-justified">
Quantitative results of accelerating various 3DGS backbones using DashGaussian.
Plugging DashGaussian into different backbones, their optimization speed is largely improved by 45.7% on average.
Most prominently, DashGaussian achieves acceleration with negligible compromise and even improvement in the rendering quality.
The results advocate that a reasonable computational resource allocation across the optimization process can largely boost the optimization while preserving the rendering quality.
''Revising-3DGS*'' denotes our reproduction of the paper based on the Taming-3DGS codebase.
Time is reported in minutes.
</div>
<img alt="Architecture" src="./static/images/table2-notext.png" width="100%"/>
</div>
</div>
</div>
</section> -->
<!-- <section class="section" id="BibTeX">
<div class="container is-max-desktop content">
<h2 class="title">BibTeX</h2>
<pre><code>@inproceedings{chen2025dashgaussian,
title = {DashGaussian: Optimizing 3D Gaussian Splatting in 200 Seconds},
author = {Chen, Youyu and Jiang, Junjun and Jiang, Kui and Tang, Xiao and Li, Zhihao and Liu, Xianming and Nie, Yinyu},
booktitle = {CVPR},
year = {2025}
}</code></pre>
</div>
</section> -->
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column">
<h2 class="title is-3" style="color:#5fb8ff;">Star History</h2>
</div>
</div>
<div class="content has-text-centered">
<a href="https://www.star-history.com/#fastgs/FastGS&type=date&legend=top-left" target="_blank">
<img src="https://api.star-history.com/svg?repos=fastgs/FastGS&type=date&legend=top-left" alt="Star History Chart" style="max-width: 100%; height: auto; border-radius: 8px; margin: 1rem auto;">
</a>
</div>
</div>
</section>
<!-- ## Star History
[](https://www.star-history.com/#fastgs/FastGS&type=date&legend=top-left) -->
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