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<!DOCTYPE html>
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<head>
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<title>MOPS: Multi-Objective Photoreal Simulation Dataset for Computer Vision in Robot Manipulation</title>
<meta name="description"
content="MOPS is a photorealistic simulation dataset providing comprehensive ground truth annotations — RGB, depth, normals, part segmentation, and affordance labels — for robot manipulation research.">
<meta name="keywords"
content="robot manipulation, dataset, affordance, segmentation, simulation, computer vision, imitation learning, ManiSkill">
<meta name="author" content="Maximilian X. Li, Paul Mattes, Nils Blank, Rudolf Lioutikov">
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content="Photorealistic simulation dataset with part-level affordance annotations for robot manipulation.">
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<!-- ── Hero / Header ───────────────────────────────── -->
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<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-2 publication-title">
MOPS: Multi-Objective Photoreal Simulation Dataset<br>
for Computer Vision in Robot Manipulation
</h1>
<div class="is-size-5 publication-authors">
<span class="author-block">Maximilian X. Li,</span>
<span class="author-block">Paul Mattes,</span>
<span class="author-block">Nils Blank,</span>
<span class="author-block">Rudolf Lioutikov</span>
</div>
<div class="is-size-6 publication-authors mt-2">
<span class="author-block">Intuitive Robots Lab, Karlsruhe Institute of Technology,
Germany</span>
</div>
<div class="column has-text-centered mt-4">
<div class="publication-links">
<span class="link-block">
<a href="./static/Li2026_MOPS.pdf"
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>
<span class="link-block">
<a href="https://github.com/LiXiling/mops-repo"
class="external-link button is-normal is-rounded is-dark">
<span class="icon"><i class="fab fa-github"></i></span>
<span>Code</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/collections/LiXiling/mops"
class="external-link button is-normal is-rounded is-dark">
<span class="icon"><i class="fas fa-database"></i></span>
<span>Dataset</span>
</a>
</span>
</div>
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</section>
<!-- ── Main content ────────────────────────────────── -->
<section class="section">
<div class="container is-max-desktop">
<div class="content">
<!-- ① Abstract -->
<div class="columns is-centered has-text-centered">
<div class="column is-four-fifths">
<h2 class="section-heading">Abstract</h2>
<div class="has-text-justified abstract-text">
<p>
Datasets providing high-quality visual annotations in manipulation-relevant scenes
remain scarce. We introduce <strong>MOPS</strong>, a dataset generation framework that
combines 3D assets from PartNet-Mobility and RoboCasa with a zero-shot LLM-based
augmentation pipeline to automatically normalize object scale and generate part-level
affordance annotations, describing how an object part can be manipulated (e.g., a mug
handle is <em>“graspable,”</em> a drawer is
<em>“pullable”</em>).
Built on ManiSkill3, MOPS produces photorealistic indoor scenes with pixel-perfect
ground truth for class, part, and instance segmentation, multi-label affordances, depth,
surface normals, and 6D poses, spanning 54 affordance types across 137 object
categories. Human verification confirms <strong>97.3%</strong> accuracy of the zero-shot
affordance labels. We validate MOPS on three vision benchmarks of increasing scene
complexity and show that ground-truth affordance masks improve imitation learning
success rates on 24 RoboCasa manipulation tasks by <strong>7.9 percentage
points</strong>
over RGB-only baselines, with predicted affordances still yielding measurable gains.
The dataset and framework are publicly available.
</p>
</div>
</div>
</div>
<hr class="section-divider">
<!-- ② Annotation Modalities -->
<div class="has-text-centered" style="margin-bottom:2rem;">
<h2 class="section-heading">Annotation Modalities</h2>
<p class="section-subheading">Rich, multi-modal ground truth for every scene</p>
</div>
<div class="columns is-multiline modality-gallery">
<div class="column is-half-tablet is-one-quarter-desktop">
<div class="modality-card">
<figure class="image"><img src="./static/image/rgb.png" alt="RGB render"></figure>
<div class="modality-label">
<span class="modality-dot" style="background:#4a90d9;"></span>RGB
</div>
</div>
</div>
<div class="column is-half-tablet is-one-quarter-desktop">
<div class="modality-card">
<figure class="image"><img src="./static/image/depth.png" alt="Depth map"></figure>
<div class="modality-label">
<span class="modality-dot" style="background:#e67e22;"></span>Depth
</div>
</div>
</div>
<div class="column is-half-tablet is-one-quarter-desktop">
<div class="modality-card">
<figure class="image"><img src="./static/image/normal.png" alt="Surface normals"></figure>
<div class="modality-label">
<span class="modality-dot" style="background:#27ae60;"></span>Surface Normals
</div>
</div>
</div>
<div class="column is-half-tablet is-one-quarter-desktop">
<div class="modality-card">
<figure class="image"><img src="./static/image/segm.png"
alt="Part / Affordance segmentation"></figure>
<div class="modality-label">
<span class="modality-dot" style="background:#8e44ad;"></span>Segmentation
</div>
</div>
</div>
</div>
<hr class="section-divider">
<!-- ③ Key Features + Technical Overview (merged) -->
<div class="has-text-centered" style="margin-bottom:2rem;">
<h2 class="section-heading">Key Features</h2>
</div>
<div class="columns is-multiline feature-grid" style="margin-bottom:1.5rem;">
<div class="column is-half">
<div class="feature-card">
<div class="feature-icon">🎨</div>
<h3 class="feature-title">Photorealistic Simulation</h3>
<p class="feature-text">High-quality rendering via ManiSkill3 & SAPIEN, built on a
normalized asset pipeline with automatic part-level annotation across multiple 3D
libraries.</p>
</div>
</div>
<div class="column is-half">
<div class="feature-card">
<div class="feature-icon">🤖</div>
<h3 class="feature-title">LLM-Powered Annotation</h3>
<p class="feature-text">Zero-shot asset augmentation using large language models for
automatic part-level labeling, scale normalization, and semantic understanding
— <strong>97.3%</strong> accurate against human verification.</p>
</div>
</div>
<div class="column is-half">
<div class="feature-card">
<div class="feature-icon">🏷️</div>
<h3 class="feature-title">Multi-Modal Ground Truth</h3>
<p class="feature-text">RGB, depth, surface normals, part segmentation, affordance maps
(<em>graspable</em>, <em>pushable</em>, …), and 6D pose — all
pixel-aligned.</p>
</div>
</div>
<div class="column is-half">
<div class="feature-card">
<div class="feature-icon">🏠</div>
<h3 class="feature-title">Diverse Environments</h3>
<p class="feature-text">Kitchen environments, cluttered tabletops, and isolated object
scenarios spanning 137 object categories and 54 affordance labels.</p>
</div>
</div>
</div>
<hr class="section-divider">
<!-- ④ Results — dataset comparison + robot results side by side -->
<div class="has-text-centered" style="margin-bottom:2rem;">
<h2 class="section-heading">Results</h2>
</div>
<div class="columns is-multiline results-split">
<!-- Left: dataset comparison -->
<div class="column is-half">
<p class="results-col-label">Dataset Comparison</p>
<p class="results-col-sub">Taxonomic coverage vs. existing affordance datasets</p>
<div class="comparison-table-wrap">
<table class="comparison-table">
<thead>
<tr>
<th>Dataset</th>
<th>Aff.</th>
<th>Cat.</th>
<th>Obj.</th>
</tr>
</thead>
<tbody>
<tr>
<td>RGB-D Part</td>
<td>7</td>
<td>17</td>
<td>105</td>
</tr>
<tr>
<td>3D-AffNet</td>
<td>16</td>
<td>23</td>
<td><strong>22,949</strong></td>
</tr>
<tr class="table-section-divider table-highlight">
<td><strong>MOPS (Total)</strong></td>
<td><strong>54</strong></td>
<td><strong>137</strong></td>
<td>3,353</td>
</tr>
</tbody>
</table>
<p class="table-caption">MOPS leads on affordance label and category breadth; 3D-AffNet has
more raw instances.</p>
</div>
</div>
<!-- Right: robot results -->
<div class="column is-half">
<p class="results-col-label">Robot Manipulation</p>
<p class="results-col-sub">Imitation learning on 24 RoboCasa tasks · 10 seeds each</p>
<div class="results-stats-inline">
<div class="stat-box">
<div class="stat-number">21.25<span class="stat-unit">%</span></div>
<div class="stat-label">Success Rate</div>
<div class="stat-sublabel">RGB + MOPS Affordances</div>
</div>
<div class="stat-box stat-box-gain">
<div class="stat-number">+7.92<span class="stat-unit">pp</span></div>
<div class="stat-label">Absolute Gain</div>
<div class="stat-sublabel">over RGB-only baseline</div>
</div>
</div>
<div class="comparison-table-wrap" style="margin-top:1rem;">
<table class="comparison-table">
<thead>
<tr>
<th>Policy Inputs</th>
<th>Success</th>
<th>Gain</th>
</tr>
</thead>
<tbody>
<tr>
<td>RGB only</td>
<td>13.33%</td>
<td><span class="gain-neutral">—</span></td>
</tr>
<tr class="table-highlight">
<td><strong>+ MOPS Affordances</strong></td>
<td><strong>21.25%</strong></td>
<td><span class="gain-positive">+7.92</span></td>
</tr>
</tbody>
</table>
<p class="table-caption">MOPS affordances provide a consistent boost across all 24 tasks.
</p>
</div>
</div>
</div>
<hr class="section-divider">
<!-- ⑤ Getting Started (with alpha notice inline) -->
<div class="has-text-centered" style="margin-bottom:2rem;">
<h2 class="section-heading">Getting Started</h2>
</div>
<div class="columns is-centered">
<div class="column is-four-fifths">
<!-- Alpha notice — contextually placed here -->
<div class="notification is-warning is-light alpha-notice" style="margin-bottom:1.5rem;">
<div class="columns is-vcentered is-mobile">
<div class="column is-narrow">
<span class="tag is-warning"><strong>Alpha</strong></span>
</div>
<div class="column">
<strong>Early release</strong> — actively developed, API may change. Code and
dataset are now publicly available:
</div>
</div>
<div class="repo-links" style="margin-top:0.6rem;">
<a href="https://github.com/LiXiling/mops-repo" class="repo-pill is-available">
<span>⚙️</span>
<span><code>mops-repo</code> — Generation framework & benchmarks</span>
<span class="repo-status">Available</span>
</a>
<a href="https://huggingface.co/collections/LiXiling/mops"
class="repo-pill is-available">
<span>🤗</span>
<span>HuggingFace — MOPS dataset collection</span>
<span class="repo-status">Available</span>
</a>
</div>
</div>
<p class="has-text-centered">
<a href="https://github.com/LiXiling/mops-repo#installation"
class="external-link button is-link is-light is-small is-rounded">
📖 Setup & Installation Guide →
</a>
</p>
</div>
</div>
<hr class="section-divider">
<!-- ⑥ Citation -->
<div class="has-text-centered" style="margin-bottom:2rem;">
<h2 class="section-heading">Citation</h2>
<p class="section-subheading">If you use MOPS in your research, please cite our work</p>
</div>
<div class="columns is-centered">
<div class="column is-four-fifths">
<div class="citation-box">
<pre><code class="language-bibtex">@article{li2026mops,
title = {Multi-Objective Photoreal Simulation (MOPS) Dataset
for Computer Vision in Robot Manipulation},
author = {Maximilian Xiling Li and Paul Mattes and
Nils Blank and Rudolf Lioutikov},
year = {2026}
}</code></pre>
</div>
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<p>
© 2026 Intuitive Robots Lab, Karlsruhe Institute of Technology.<br>
Dataset and code released under <a href="https://creativecommons.org/licenses/by/4.0/"
target="_blank">CC-BY 4.0</a>.
</p>
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