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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="keywords" content="OpenSun3D">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Open☀️3D </title>
<link rel="stylesheet" href="./static/css/bulma.min.css">
<link rel="stylesheet" href="./static/css/fontawesome.all.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/jpswalsh/academicons@1/css/academicons.min.css">
<link rel="stylesheet" href="./static/css/index_new.css">
<link rel="icon" href="./static/images/favicon.svg">
<link rel="stylesheet" href="css/style.css"> <!-- Resource style -->
<script src="js/modernizr.js"></script> <!-- Modernizr -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script defer src="./static/js/fontawesome.all.min.js"></script>
</head>
<body>
<section class="hero">
<!-- <div class="hero-body" style="background-color: #1C2D59"> -->
<div class="hero-body" style="background-color: #1C2D59; background-image: url('static/images/2bdcba49-2213-4d49-89af-5266e2fab56b.jpg'); background-size: cover; background-repeat: no-repeat; background-position: center;">
<div class="container is-max-desktop">
<div class="columns is-centered">
<div class="column has-text-centered">
<h1 class="title is-1 outline" style="color: white">OpenSUN3D</h1>
<p class="title is-4 outline" style="color: white">6<sup>th</sup> Workshop on Open-World 3D Scene Understanding and Representations</p>
<h1 class="is-is-5 outline" style="color: white"><b>in conjunction with CVPR in Colorado, USA.</b></h1>
<!-- <h1 class="is-is-5" style="color: white">Room: 306 B</h1> -->
</div>
</div>
</div>
</div>
</section>
<section>
<div class="container is-max-desktop">
<div class="hero-body">
<h2 class="subtitle has-text-centered">
<a href="#schedule" class="button">Schedule</a>
<a href="#speakers" class="button">Speakers</a>
<!-- <a href="#papers" class="button">Papers</a> -->
<a href="#paper_track" class="button">Paper Track</a>
<a href="#challenge" class="button">Challenge</a>
<a href="#relatedwork" class="button">Related Work</a>
<a href="#organizers" class="button">Organizers</a>
<div class="dropdown">
<span class="button">All Editions <i class="fa fa-chevron-down" aria-hidden="true"></i></span>
<div class="dropdown-content">
<a href="index.html">CVPR 2026</a><br />
<a href="index_iccv25.html">ICCV 2025</a><br />
<a href="index_cvpr25.html">CVPR 2025</a><br />
<a href="index_eccv24.html">ECCV 2024</a><br />
<a href="index_cvpr24.html">CVPR 2024</a><br />
<a href="index_iccv23.html">ICCV 2023</a>
</div>
</div>
</h2>
</div>
</div>
</section>
<section class="section" id="Motivation">
<div class="container is-max-desktop content">
<h2 class="title">Introduction</h2>
<div class="content has-text-justified">
For intelligent agents to thrive in the physical world, they must not only perceive but also comprehend and act within it.
This year’s workshop unites leading researchers advancing world models and spatial intelligence, from 3D perception and scene understanding to generative world representations.
Through keynotes and a challenge on open 3D interaction perception, we will explore how machines learn to reason about and engage with their environments.
The workshop aims to shape the next generation of spatially grounded AI, bridging scientific discovery, practical deployment, and responsible innovation.
</div>
</div>
</section>
<section class="section" id="global-timeline">
<div class="container is-max-desktop content">
<h2 class="title is-4">
Important Dates
</h2>
<div class="timeline-horizontal">
<!-- Openings -->
<div class="timeline-item" data-date="2026-01-15">
<a class="button is-small is-dark is-outlined" href="#challenge">Challenge</a>
<p>Challenges Open</p>
<time>Jan 15, 2026</time>
</div>
<div class="timeline-item" data-date="2026-01-15">
<a class="button is-small is-link is-outlined" href="#paper_track">Paper Track</a>
<p>Paper Submissions Open</p>
<time>Jan 15, 2026</time>
</div>
<!-- Paper deadlines -->
<div class="timeline-item" data-date="2026-03-12">
<a class="button is-small is-link is-outlined" href="#paper_track">Paper Track</a>
<p>Proceedings Track Deadline</p>
<time>Mar 12, 2026</time>
</div>
<div class="timeline-item" data-date="2026-04-20">
<a class="button is-small is-link is-outlined" href="#paper_track">Paper Track</a>
<p>Non-Archival Track Deadline</p>
<time>Apr 20, 2026</time>
</div>
<!-- Challenge deadline -->
<div class="timeline-item" data-date="2026-05-29">
<a class="button is-small is-dark is-outlined" href="#challenge">Challenge</a>
<p>Challenges Deadline</p>
<time>May 29, 2026</time>
</div>
<!-- Workshop -->
<div class="timeline-item" data-date="2026-06-03">
<a class="button is-small is-warning" href="#speakers">Workshop</a>
<p>Workshop</p>
<time>June TBD, 2026</time>
</div>
</div>
<div class="next-deadline-box">
⏳ <strong>Next deadline:</strong>
<span id="next-deadline-label"></span>
—
<span id="next-deadline-countdown"></span>
</div>
</div>
</section>
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<!-- <section class="section" style="margin-top: -50px">
<div class="container is-max-desktop">
<section class="section" id="Challenge">
<div class="container is-max-desktop content">
<h2 class="title" id="challenge">Challenge 🚀</h2>
This year, our challenge will consist of two tracks, open-vocabulary 3D object instance search and
open-vocabulary 3D functionality grounding.
<br>
<ul>
<li><b>Challenge Track 1</b>: <a href="https://opensun3d.github.io/cvpr24-challenge/track_1">Open-vocabulary
3D Object Instance
Search</a></li>
<ul>
<li><b>Submission Portal</b>: <a
href="https://eval.ai/web/challenges/challenge-page/2102/overview">EvalAI</a></li>
<li><b>Data Instructions & Helper Scripts</b>: April 17, 2024</li>
<li><b>Dev Phase Start</b>: April 17, 2024</li>
<li><b>Submission Portal Start</b>: April 19, 2024</li>
<li><b>Test Phase Start</b>: May 1, 2024</li>
<li><b>Test Phase End</b>: June 14, 2024 (14:00 Pacific Time)</li>
</ul>
<li><b>Challenge Track 2</b>: <a href="https://opensun3d.github.io/cvpr24-challenge/track_2">Open-vocabulary
3D Functionality
Grounding</a></li>
<ul>
<li><b>Submission Portal</b>: <a
href="https://eval.ai/web/challenges/challenge-page/2262/overview">EvalAI</a></li>
<li><b>Data Instructions & Helper Scripts</b>: April 17, 2024</li>
<li><b>Dev Phase Start</b>: April 17, 2024</li>
<li><b>Submission Portal Start</b>: April 19, 2024</li>
<li><b>Test Phase Start</b>: May 4, 2024</li>
<li><b>Test Phase End</b>: June 14, 2024 (14:00 Pacific Time)</li>
</ul>
</ul>
<p>Please check <a href="https://opensun3d.github.io/index_iccv23.html#challengeresults">this page</a>
out
for an overview of last year's challenge results.
We have also published a <a href="https://arxiv.org/abs/2402.15321"> technical report</a> providing an
overview of our ICCV 2023 workshop challenge.</p>
<p>Our workshop challenge is proudly supported by:</p>
<p align="center">
<img src="static/images/matterport.png" width="40%" style="margin: 20px" />
<img src="static/images/nvidia.png" width="40%" style="margin: 20px" />
</p>
</div>
</section>
</div>
</section>
<section class="section" id="Papers">
<div class="container is-max-desktop content">
<h2 class="title" id="dates">Important Dates 🗓️</h2>
<b>Paper Track</b>: We accept novel full 8-page papers for publication in the proceedings, and
either shorter
4-page extended abstracts or 8-page papers of novel or previously published work that will not
be included in
the
proceedings. All submissions have to follow the <a
href="https://cvpr.thecvf.com/Conferences/2024/AuthorGuidelines">CVPR 2024 author
guidelines.</a>
</li>
<ul>
<li><b>Submission Portal</b>: <a href="https://cmt3.research.microsoft.com/OpenSUN3D2024">CMT</a></li>
<li><b>Paper Submission Deadline</b>: April 1, 2024 (23:59 Pacific Time)</li>
<li><b>Notification to Authors</b>: April 9, 2024</li>
<li><b>Camera-ready submission</b>: April 14, 2024</li>
</ul>
</div>
</section> -->
<!-- <section class="section" id="schedule">
<div class="container is-max-desktop content">
<h2 class="title">Schedule (Room 306 B)</h2>
<div class="content has-text-justified">
<table class="table table-striped">
<tr>
<td width="130">13:30 - 13:40</td>
<td style="background-color: #ddadef37">Welcome & Introduction</td>
</tr>
<tr>
<td>13:40 - 14:20</td>
<td style="background-color:#8cd8fb72">
Keynote 1
<b>Mackenzie W. Mathis</b> (EPFL)
</td>
</tr>
<tr>
<td>14:20 - 15:00</td>
<td style="background-color:#8cd8fb72">
Keynote 2
<b>Saining Xie</b> (NYU)
</tr>
<tr>
<td>15:00 - 16:00</td>
<td style="background-color: #ddadef37">Coffee Break & Poster Session (Hall II, Boards 148-157)</td>
</tr>
<tr>
<td>16:00 - 16:40</td>
<td style="background-color:#8cd8fb72">
Keynote 3
<b>Julian Straub</b> (Meta RLR)
</tr>
<tr>
<td>16:40 - 17:20</td>
<td style="background-color:#8cd8fb72">
Keynote 4
<b>Angel X. Chang</b> (SFU)
</tr>
<tr>
<td>17:20 - 18:00</td>
<td style="background-color:#8cd8fb72">
Keynote 5
<b>Iro Armeni</b> (Stanford)
</tr>
<tr>
<td>18:00 - 18:10</td>
<td style="background-color: #ddadef37">Concluding Remarks</td>
</tr>
</table>
</div>
</div>
</section>-->
<section class="section" id="Invited Speakers">
<div class="container is-max-desktop content">
<h2 class="title" id="speakers">Keynote Speakers</h2>
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/tali.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://www.weizmann.ac.il/math/dekel/" target="_blank">
<p class="title is-4">Tali Dekel</p>
<p class="subtitle is-6">Associate Professor at Weizmann Institute<br />Staff Research Scientist at Google Deepmind</p>
</a>
</div>
</div>
<p>
Tali Dekel is an Associate Professor at the Faculty of Mathematics and Computer Science at the Weizmann Institute of Science,
and a Staff Research Scientist at Google DeepMind. Before that she was a Postdoctoral Associate with Prof. Bill Freeman, at CSAIL, MIT.
She completed her Ph.D. in the school of Electrical Engineering of Tel-Aviv University, where she was supervised by Prof. Shai Avidan (TAU) and Prof. Yael Moses (IDC).
Her main research interests include images and videos analysis, multi-view systems, 3D structure and motion estimation, image synthesize and rendering.
</p>
</div>
</div>
<br />
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/djamila.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://daouada.github.io/" target="_blank">
<p class="title is-4">Djamila Aouada</p>
<p class="subtitle is-6">Associate Professor at the University of Luxembourg</p>
</a>
</div>
</div>
<p>
Djamila Aouada is an Associate Professor at the University of Luxembourg (UL) and the Deputy Director of the Interdisciplinary Centre for Security, Reliability and Trust (SnT).
She leads the Computer Vision, Imaging and Machine Intelligence (CVI²) research group, focusing on advancing research in Computer Vision and Machine Learning with emphasis on real-world applications through industrial collaborations.
</p>
</div>
</div>
<br />
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/vasilis.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://vbalnt.github.io/" target="_blank">
<p class="title is-4">Vasileios Balntas</p>
<p class="subtitle is-6">Reality Labs Research</p>
</a>
</div>
</div>
<p>
Vasileios Balntas is a Research Science Manager in Reality Labs Research, and an Honorary Research Associate at the Department of Electrical and Electronic Engineering at Imperial College London.
Previously he was Head of Research at Scape Technologies, and a post-doctoral researcher at University of Oxford.
</p>
</div>
</div>
<br />
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/holynski.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://holynski.org/" target="_blank">
<p class="title is-4">Aleksander Holynski</p>
<p class="subtitle is-6">Research Scientist at Google DeepMind</p>
</a>
</div>
</div>
<p>
Aleksander Holynski is a research scientist at Google DeepMind and a professor at Columbia University.
Previously, he was a postdoctoral scholar at UC Berkeley (BAIR) working with Alyosha Efros and Angjoo Kanazawa.
He did his PhD at the University of Washington, advised by Steve Seitz, Brian Curless, and Rick Szeliski and received his B.S. at the University of Illinois at Urbana-Champaign.
</p>
</div>
</div>
<br />
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/chelsea.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://ai.stanford.edu/~cbfinn/" target="_blank">
<p class="title is-4">Chelsea Finn</p>
<p class="subtitle is-6">Assistant Professor at Stanford University<br />Co-founder of Pi</p>
</a>
</div>
</div>
<p>
Chelsea Finn is an Assistant Professor in Computer Science and Electrical Engineering at Stanford University and co-founder of Pi.
Her lab, IRIS, studies intelligence through robotic interaction at scale, and is affiliated with SAIL and the ML Group.
She is interested in the capability of robots and other agents to develop broadly intelligent behavior through learning and interaction.
Previously, she completed her Ph.D. in computer science at UC Berkeley and her B.S. in electrical engineering and computer science at MIT.
</p>
</div>
</div>
<br />
<div class="card">
<div class="card-content">
<div class="columns is-vcentered">
<div class="column is-one-quarter">
<figure class="image is-128x128">
<img class="is-rounded" src="static/img/andrea.jpg" style="width: 128px; height: 128px; object-fit: cover;">
</figure>
</div>
<div class="column">
<a href="https://theialab.ca/" target="_blank">
<p class="title is-4">Andrea Tagliasacchi</p>
<p class="subtitle is-6">Assistant Professor at Simon Fraser University</p>
</a>
</div>
</div>
<p>
Andrea Tagliasacchi is an Associate Professor at Simon Fraser University (Vancouver, Canada), where he holds the Visual Computing Research Chair within the School of Computing Science.
He is also an Associate Professor in the Department of Computer Science at the University of Toronto.
Before joining SFU, Andrea spent several years as a researcher at Google.
Prior to that, he was an Assistant Professor at the University of Victoria (2015–2018),
where he held the Industrial Research Chair in 3D Sensing, jointly sponsored by Google and Intel.
Andrea’s academic background includes a postdoctoral fellowship at EPFL, a PhD from Simon Fraser University (as an NSERC Alexander Graham Bell Fellow),
and an MSc from Politecnico di Milano, where he graduated as a gold medalist.
His research focuses on 3D visual perception, a field that bridges computer vision, computer graphics,
and machine learning.
</p>
</div>
</div>
</div>
</section>
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<section class="section" id="dates">
<div class="container is-max-desktop content">
<h2 class="title" id="challenge">Challenge</h2>
<p>
This year, we host a challenge based on the <a href="https://scenefun3d.github.io" target="_blank" rel="noopener">SceneFun3D benchmark</a> and the <a href="https://insait-institute.github.io/articulate3d.github.io/" target="_blank" rel="noopener">Articulate3D dataset</a>.
The challenge focuses on fine-grained functionality, affordance, and interaction understanding in 3D indoor environments. It consists of three tracks:
</p>
<span style="
background: linear-gradient(135deg, #dbe7ff 0%, #cddcff 100%);
color: #044285;
padding: 0.25em 0.5em;
border-radius: 6px;
font-weight: 600;
font-size: 0.95rem;
display: inline-block;
line-height: 1.4;
">
🏆 Prize per challenge winner team: €1,000
</span>
<ul>
<li><b>Track 1:</b> Functionality Segmentation [SceneFun3D] <a href="https://scenefun3d.github.io/benchmark">Benchmark</a></li>
<li><b>Track 2:</b> Open-Vocabulary 3D Affordance Grounding [SceneFun3D] <a href="https://scenefun3d.github.io/benchmark">Benchmark</a></li>
<li><b>Track 3:</b> Interaction Understanding [Articulate3D]</li>
</ul>
<p>Below are key resources and important dates for each track.</p>
<h4>Tracks 1 & 2 [SceneFun3D]</h4>
<ul>
<li><a href="https://scenefun3d.github.io/documentation" target="_blank" rel="noopener">SceneFun3D Documentation</a></li>
<li><a href="https://eval.ai/web/challenges/challenge-page/2466/overview" target="_blank" rel="noopener">Benchmark Submission Portal</a></li>
<li><a href="https://scenefun3d.github.io/documentation/benchmarks/guidelines/" target="_blank" rel="noopener">Benchmark Submission Instructions</a></li>
<li><b>Submission Opens:</b> June 25, 2025</li>
<li><b>Submission Deadline:</b> October 14, 2025</li>
</ul>
<h4>Track 3 [Articulate3D]</h4>
<ul>
<li><a href="https://insait-institute.github.io/articulate3d.github.io/challenge.html" target="_blank" rel="noopener">Track 3 Documentation</a></li>
<li><a href="https://insait-institute.github.io/articulate3d.github.io" target="_blank" rel="noopener">Articulate3D</a></li>
<li><a href="https://art3dchallenge.jumpingcrab.com/web/challenges/challenge-page/21/overview" target="_blank" rel="noopener">Track 3 Submission Portal</a></li>
<li><b>Submission Opens:</b> August 1, 2025</li>
<li><b>Submission Deadline:</b> October 14, 2025</li>
</ul>
</div>
</section>
<section class="section" id="dates">
<div class="container is-max-desktop content">
<h2 class="title" id="paper_track">Poster Presentations</h2>
All paper submission that are accepted have to option to be presented as posters during the workshop.
<br><br>
<u>For poster presenters</u>:
Please use <b>poster boards 148-157</b> in <b>Hall D (Level 3)</b> to put your poster.
<br><br>
<u>Printing your poster</u>:
Please follow the official <a href="https://cvpr.thecvf.com/Conferences/2025/PosterPrintingInformation">CVPR 2025 guidelines for poster preparation</a>.
Note the <b>early bird</b> poster printing deadline of <b>May 25, 2025</b>.
</div>
</section> -->
<!--
<section class="section" id="dates">
<div class="container is-max-desktop content">
<h2 class="title" id="paper_track">Paper Track</h2>
We invite <b>8-page full papers</b> for inclusion in the proceedings,
as well as <b>4-page extended abstracts</b>. Extended abstracts may present either new or previously published work
but will not be included in the proceedings.
4-page extended abstracts generally do not conflict with the dual submission policies of other conferences,
whereas 8-page full papers, if accepted, will be part of the proceedings and are therefore subject to the dual submission policy
(i.e., they cannot be under review for another conference at the same time or already accepted at another conference).
All submissions should be anonymous and follow the <a href="https://media.eventhosts.cc/Conferences/ICCV2025/ICCV2025-Author-Kit-Feb.zip">official ICCV 2025</a> guidelines.
<ul>
<li><b>Submission portal</b>: <a href="https://openreview.net/group?id=thecvf.com/ICCV/2025/Workshop/OpenSUN3D#tab-recent-activity">OpenReview</a></li>
<li><b>Paper submission opens</b>: June 23, 2025 </li>
<br>
<b>SUBMISSION DEADLINE 1 - Full Papers in Proceedings</b>
<li><b>Submission deadline 1 (full-papers in proceedings) </b>: July 4, 2025 (23:59 GMT) <i> (Countdown: <span class="countdown" data-target="July 1, 2025 23:59:59 UTC"></span>)</i>
<!-- <i> (Countdown: <span class="countdown" data-target="July 1, 2025 23:59:59 UTC"></span>)</i>
</li>
<li><b>Notification to authors (full-papers in proceedings)</b>: July 10, 2025 </li>
<li><b>Camera ready submission</b>: August 10, 2025 </li>
<br>
<b>SUBMISSION DEADLINE 2 - Extended Abstracts and Non-Archival Full Papers (No Proceedings!)</b>
</li>
<li><b>Submission deadline 2 </b>: September 1, 2025 (23:59 GMT) <i> (Countdown: <span class="countdown" data-target="September 1, 2025 23:59:59 UTC"></span>)</i>
<li><b>Notification to authors</b>: September 15, 2025 </li>
</ul>
</div>
</section> -->
<section class="section" id="paper_track">
<div class="container is-max-desktop content">
<h2 class="title">
Paper Track
<span style="
font-size: 0.6em;
color: white;
background-color: #28a745;
border-radius: 4px;
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vertical-align: super;
">Open</span>
</h2>
<table class="table is-fullwidth is-striped">
<thead>
<tr>
<th>Submission Type</th>
<th>Length</th>
<th>In Proceedings</th>
<th>Deadline</th>
<th>Policies</th>
</tr>
</thead>
<tbody>
<tr>
<td>Proceedings Track</td>
<td>8 pages</td>
<td>Yes</td>
<td><strong>Mar 12, 2026</strong></td>
<td>Anonymous, subject to dual-submission rules.</td>
</tr>
<tr>
<td>Non-Archival Track</td>
<td>4 / 8 pages</td>
<td>No</td>
<td><strong>Apr 20, 2026</strong></td>
<td>Anonymous, may include previously published work.</td>
</tr>
</tbody>
</table>
<div style="margin-top: 1rem; margin-bottom: 1rem;">
<a class="button_submit" href="https://openreview.net/group?id=thecvf.com/CVPR/2026/Workshop/OpenSUN3D#tab-recent-activity" target="_blank">
Submit via OpenReview
</a>
</div>
<p>
All submissions must be anonymous and follow the
<a href="https://cvpr.thecvf.com/Conferences/2026/AuthorGuidelines">CVPR 26 author guidelines</a>.
</p>
<div class="columns is-multiline">
<!-- Deadline 1 -->
<div class="column is-6">
<div class="card">
<div class="card-content">
<h4 class="title is-5">
Submission Deadline 1:<br>Proceedings Track
</h4>
<p>
8-page full papers for inclusion in the <strong>CVPR workshop proceedings</strong>.
Those submissions are subject to the dual submission policy, only original work not under review or published elsewhere is allowed.
</p>
<ul>
<li>
<i class="fa fa-flag-checkered"></i>
<strong>Submission deadline:</strong>
March 12, 2026 (23:59 GMT)
<br>
<i class="is-size-6">
Countdown:
<span class="countdown" data-target="March 12, 2026 23:59:59 UTC"></span>
</i>
</li>
<li>
<i class="fa fa-envelope"></i>
<strong>Notification to authors:</strong> March 19, 2026
</li>
<li>
<i class="fa fa-upload"></i>
<strong>Camera-ready submission:</strong> April 10, 2026
</li>
</ul>
</div>
</div>
</div>
<!-- Deadline 2 -->
<div class="column is-6">
<div class="card">
<div class="card-content">
<h4 class="title is-5">
Submission Deadline 2:<br>Extended Abstracts & Non-Archival Papers
</h4>
<p>
4-page extended abstracts or 8-page full papers that will <strong>not be included in the proceedings.</strong>
May include previously published work that the authors want to present at the workshop.
</p>
<ul>
<li>
<i class="fa fa-flag-checkered"></i>
<strong>Submission deadline:</strong>
April 20, 2026 (23:59 GMT)
<br>
<i class="is-size-6">
Countdown:
<span class="countdown" data-target="April 20, 2026 23:59:59 UTC"></span>
</i>
</li>
<li>
<i class="fa fa-envelope"></i>
<strong>Notification to authors:</strong> April 25, 2026
</li>
<li>
May include previously published work.
</ul>
</div>
</div>
</div>
</div>
</div>
</section>
<section class="section" id="challenge">
<div class="container is-max-desktop content">
<h2 class="title">Challenge Track
<span style="
font-size: 0.6em;
color: white;
background-color: #28a745;
border-radius: 4px;
padding: 0.2em 0.5em;
vertical-align: super;
">Open</span>
</h2>
<p class="has-text-justified">
We host a 3-track challenge based on the
<a href="https://scenefun3d.github.io" target="_blank" rel="noopener">SceneFun3D benchmark</a>
and the
<a href="https://insait-institute.github.io/articulate3d.github.io/" target="_blank" rel="noopener">Articulate3D dataset</a>.
The challenge focuses on fine-grained functionality, affordance, and interaction understanding in 3D indoor environments.
</p>
<!--
<div class="notification is-info is-light">
🏆 <strong>Prize:</strong> €1,000 per challenge-winning team
</div>
-->
<h4 class="title is-5">Tracks Overview</h4>
<ul>
<li><strong>Track 1:</strong> Functionality Segmentation (SceneFun3D)</li>
<li><strong>Track 2:</strong> Open-Vocabulary 3D Affordance Grounding (SceneFun3D)</li>
<li><strong>Track 3:</strong> Interaction Understanding (Articulate3D)</li>
</ul>
<br>
<div class="columns is-multiline">
<!-- Track 1 & 2 -->
<div class="column is-6">
<div class="card">
<div class="card-content">
<h4 class="title is-5">Tracks 1 & 2 — SceneFun3D</h4>
<p><strong>Resources</strong></p>
<div class="buttons">
<a class="button is-small" href="https://scenefun3d.github.io/documentation" target="_blank">SceneFun3D Documentation</a>
<a class="button is-small" href="https://scenefun3d.github.io/documentation/benchmarks/guidelines/" target="_blank">Submission Instructions</a>
<a class="button is-small" href="https://eval.ai/web/challenges/challenge-page/2466/overview" target="_blank">Submission Portal</a>
</div>
<p><strong>Important Dates</strong></p>
<ul>
<li><i class="fa fa-calendar"></i> Challenge start: <strong>Jan 15, 2026</strong></li>
<li><i class="fa fa-flag-checkered"></i> Submission deadline: <strong>May 29, 2026</strong></li>
</ul>
</div>
</div>
</div>
<!-- Track 3 -->
<div class="column is-6">
<div class="card">
<div class="card-content">
<h4 class="title is-5">Track 3 — Articulate3D</h4>
<p><strong>Resources</strong></p>
<div class="buttons">
<a class="button is-small" href="https://insait-institute.github.io/articulate3d.github.io/challenge.html" target="_blank">Articulate3D Challenge Website</a>
<a class="button is-small" href="https://insait-institute.github.io/articulate3d.github.io" target="_blank">Dataset Website</a>
<a class="button is-small" href="https://art3dchallenge.jumpingcrab.com/web/challenges/challenge-page/21/overview" target="_blank">Submission Portal</a>
</div>
<p><strong>Important Dates</strong></p>
<ul>
<li><i class="fa fa-calendar"></i> Submission opens: <strong>Jan 15, 2026</strong></li>
<li><i class="fa fa-flag-checkered"></i> Submission deadline: <strong>May 29, 2026</strong></li>
</ul>
</div>
</div>
</div>
</div>
<!--
<p class="mt-5">Our workshop challenge is proudly supported by:</p>
<div class="has-text-centered">
<img src="static/images/vivo.png" width="25%" style="margin: 20px;">
<img src="https://eval.ai/dist/images/evalai-logo.png" width="25%" style="margin: 20px;">
</div>
-->
</div>
</section>
<section class="section" id="Related Work">
<div class="container is-max-desktop content">
<h2 class="title" id="relatedwork">Related Works</h2>
Below is a collection of concurrent and related works in the field of open-set 3D scene understanding.
<ul>
<li><a href="https://concept-fusion.github.io/">ConceptFusion: Open-set Multimodal 3D Mapping</a> RSS'23
</li>
<li><a href="https://pengsongyou.github.io/openscene">OpenScene: 3D Scene Understanding with Open
Vocabularies</a> CVPR'23</li>
<li><a href="https://www.lerf.io">LERF: Language Embedded Radiance Fields</a> ICCV'23</li>
<li><a href="https://pfnet-research.github.io/distilled-feature-fields/">Decomposing NeRF for Editing
via Feature Field Distillation</a> NeurIPS'22</li>
<li><a href="https://semantic-abstraction.cs.columbia.edu/">Semantic Abstraction: Open-World 3D Scene
Understanding from 2D Vision-Language Models</a> CoRL'22</li>
<li><a href="https://rozdavid.github.io/scannet200">Language-Grounded Indoor 3D Semantic Segmentation in
the Wild</a> ECCV'22</li>
<li><a href="https://3dlg-hcvc.github.io/multiscan/">MultiScan: Scalable RGBD Scanning for 3D
Environments with Articulated Objects</a> NeurIPS'22</li>
<li><a href="https://github.com/NVlabs/ODISE">ODISE: Open-Vocabulary Panoptic Segmentation with
Text-to-Image Diffusion Models</a> CVPR'23</li>
<li><a href="https://github.com/Kunhao-Liu/3D-OVS">Weakly Supervised 3D Open-Vocabulary Segmentation</a>
NeurIPS'23</li>
<li><a href="https://arxiv.org/abs/2306.02329">Multi-CLIP: Contrastive Vision-Language Pre-training for
Question Answering tasks in 3D Scenes</a></li>
<li><a href="https://openmask3d.github.io">OpenMask3D: Open-Vocabulary 3D Instance Segmentation</a>
NeurIPS'23</li>
<li><a href="https://arxiv.org/abs/2303.04748">CLIP-FO3D: Learning Free Open-world 3D Scene
Representations from 2D Dense CLIP</li>
<li><a href="https://tsagkas.github.io/vl-fields/">VL-Fields: Towards Language-Grounded Neural Implicit
Spatial Representations</a> ICRA'23</li>
<li><a
href="https://openaccess.thecvf.com/content/CVPR2023/papers/Ding_PLA_Language-Driven_Open-Vocabulary_3D_Scene_Understanding_CVPR_2023_paper.pdf">PLA:
Language-Driven Open-Vocabulary 3D Scene Understanding</a> CVPR'23</li>
<li><a href="https://arxiv.org/abs/2304.00962">RegionPLC: Regional Point-Language Contrastive Learning
for Open-World 3D Scene Understanding</a></li>
<li><a href="https://arxiv.org/abs/2309.00616">OpenIns3D: Snap and Lookup for 3D open-vocabulary
Instance Segmentation</a></li>
<li><a href="https://concept-graphs.github.io/assets/pdf/2023-ConceptGraphs.pdf">ConceptGraphs:
Open-Vocabulary 3D Scene Graphs for Perception and Planning</a></li>
<li><a
href="https://openaccess.thecvf.com/content/CVPR2023/papers/Lu_Open-Vocabulary_Point-Cloud_Object_Detection_Without_3D_Annotation_CVPR_2023_paper.pdf">Open-Vocabulary
Point-Cloud Object Detection without 3D Annotation</a> CVPR'23</li>
<li><a href="https://github.com/yangcaoai/CoDA_NeurIPS2023">CoDA: Collaborative Novel
Box Discovery and Cross-modal Alignment for Open-vocabulary 3D Object Detection</a> NeurIPS'23
<li><a href="https://scenefun3d.github.io">SceneFun3D: Fine-Grained Functionality and Affordance Understanding
in 3D Scenes</a> CVPR'24
</li>
<li>
<a href="https://github.com/MIT-SPARK/Clio">
Clio: Real-time Task-Driven Open-Set 3D Scene Graphs</a> RA-L'24
</li>
<li>
<a href="https://nvlabs.github.io/Mosaic3D/">
Mosaic3D: Foundation Dataset and Model for Open-Vocabulary 3D Segmentation</a> CVPR'25
</li>
<li>
<a href="https://cvrp-sole.github.io/">
SOLE 🐾
Segment Any 3D Object with Language</a> ICLR'25
</li>
<br>
</ul>
and many more ... Please
feel free to reach out to add your own work (<a href="mailto:engelmann@cs.stanford.edu">engelmann@cs.stanford.edu</a>).
</ul>
</div>
</section>
<section class="section" id="Organizers">
<div class="container is-max-desktop content">
<h2 class="title" id="organizers">Organizers</h2>
<div class="columns is-centered is-variable is-0">
<div class="column is-one-fifth">
<a href="http://francisengelmann.github.io">
<div class="card">
<div class="card-image">
<figure class="image">
<img class="is-rounded" src="./static/img/francis.jpg" alt="Placeholder image">
</figure>
</div>
<div class="card-content">
<div class="media">
<div class="media-content" style="overflow-x: unset;">
<p class="title is-7 is-spaced">Francis Engelmann</p>
<p class="subtitle is-7">USI</p>
</div>
</div>
</div>
</div>
</a>
</div>
<div class="column is-one-fifth">
<a href="https://aycatakmaz.github.io">
<div class="card">
<div class="card-image">
<figure class="image">
<img class="is-rounded" src="./static/img/ayca.jpg" alt="Placeholder image">
</figure>
</div>
<div class="card-content">
<div class="media">
<div class="media-content" style="overflow-x: unset;">
<p class="title is-7 is-spaced">Ayca Takmaz</p>
<p class="subtitle is-7">ETH Zurich</p>
</div>
</div>
</div>
</div>
</a>
</div>
<div class="column is-one-fifth">
<a href="https://alexdelitzas.github.io/">
<div class="card">
<div class="card-image">
<figure class="image">
<img class="is-rounded" src="./static/img/alex.jpeg" alt="Placeholder image">
</figure>
</div>
<div class="card-content">
<div class="media">
<div class="media-content" style="overflow-x: unset;">
<p class="title is-7 is-spaced">Alex Delitzas</p>
<p class="subtitle is-7">ETH Zurich, MPI</p>
</div>
</div>
</div>
</div>
</a>
</div>
<div class="column is-one-fifth">
<a href="https://elisabettafedele.github.io/">
<div class="card">
<div class="card-image">
<figure class="image">
<img class="is-rounded" src="./static/img/elisabetta.png" alt="Placeholder image">
</figure>
</div>
<div class="card-content">
<div class="media">
<div class="media-content" style="overflow-x: unset;">
<p class="title is-7 is-spaced">Elisabetta Fedele</p>
<p class="subtitle is-7">ETH Zurich</p>
</div>
</div>
</div>
</div>
</a>
</div>
</div>
<div class="columns is-centered is-variable is-0">
<div class="column is-one-fifth">
<a href="https://insait.ai/anna-maria-halacheva/">
<div class="card">
<div class="card-image">
<figure class="image">
<img class="is-rounded" src="./static/img/am.jpg" alt="Placeholder image">
</figure>
</div>
<div class="card-content">
<div class="media">
<div class="media-content" style="overflow-x: unset;">
<p class="title is-7 is-spaced">Anna-Maria Halacheva</p>
<p class="subtitle is-7">INSAIT</p>
</div>
</div>
</div>