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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>DSCombiner</title>
<!-- <link rel="stylesheet" href="./public/css/main.css" /> -->
<link rel="stylesheet" href="./public/css/main.css" />
</head>
<body>
<div class="camera"> <!-- Camera is like a wrapper, everything outside the camera won't have perspective effect. -->
<div class="main">
<div class="content">
<div class="pre-content">
<h1>DSCombiner: Double Shrinkage for Combining Biased and Unbiased Monte Carlo Renderings</h1>
<h2><a href="DSCombiner.pdf" target="_blank" class="pdf-link">[Paper PDF]</a></h2>
<h2 class="authors">CHENXI ZHOU, KEHENG XU, MUFAN GUO, XIANHAO YU, ZHIMIN FAN, GUIHUAN FENG, YANWEN
GUO, and JIE GUO∗</h2>
<h3>Abstract</h3>
<p style="text-indent: 2em;">Monte Carlo rendering often faces a dilemma, namely, whether to choose an
unbiased estimator or a biased one. Although different integrators have been
developed to address various scenarios, no single method can effectively
manage all situations. Thus, finding a good approach to combine different
integrators has always been a topic that warrants exploration.</p>
<p style="text-indent: 2em;">This work proposes DSCombiner, a new shrinkage estimator that flexibly
combines unbiased and biased estimators (typically generated by different
integrators) in image space into a single estimating procedure, strategically
utilizing the strengths of different integrators while minimizing their weaknesses. DSCombiner overcomes the limitation of single shrinkage combiners
by introducing a two-step shrinkage towards a noise-free radiance prior.
We derive optimal shrinkage factors for the two steps within a hierarchical
Bayesian framework, and provide a deep learning-based method to improve
the results. Comprehensive qualitative and quantitative validations across
diverse scenes demonstrate visible improvements in image quality, as compared with previous image-space and path-space combiners.
</p>
</div>
<div class="articles">
<div class="article overview">
</div>
<!-- fig 10 -->
<div class="article">
<h3>Equal-time comparisons between our DSCombiner with DeepCombiner and NeuralJS</h3>
<hr />
<div class="thumbs">
<div class="thumb">
<a href="public/fig10/1.spotlight/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig10/1.spotlight/images/ds_1280s.png" alt="Picture">
<figcaption class="caption thumb-text">Spotlight (1280s)</figcaption>
</figure>
</a>
</div>
<div class="thumb">
<a href="public/fig10/2.kitchen/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig10/2.kitchen/images/ds_1280s.png" alt="Picture">
<figcaption class="caption thumb-text">Kitchen (1280s)</figcaption>
</figure>
</a>
</div>
<div class="thumb">
<a href="public/fig10/3.swimming_pool/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig10/3.swimming_pool/images/ds_320s.png" alt="Picture">
<figcaption class="caption thumb-text">Swimming Pool (320s)</figcaption>
</figure>
</a>
</div>
<div class="thumb">
<a href="public/fig10/4.bookshelf/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig10/4.bookshelf/images/ds_160s.png" alt="Picture">
<figcaption class="caption thumb-text">Bookshelf (160s)</figcaption>
</figure>
</a>
</div>
</div>
</div>
<!-- fig 11 -->
<div class="article">
<h3>Comparisons between path-space combination and our DSCombiner</h3>
<hr />
<div class="thumbs">
<div class="thumb">
<a href="public/fig11/1.swimming_pool/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig11/1.swimming_pool/images/ds_2560s.png" alt="Picture">
<figcaption class="caption thumb-text">Swimming Pool (2560s)</figcaption>
</figure>
</a>
</div>
<div class="thumb">
<a href="public/fig11/2.dinning_room/index.html">
<figure class="image-container">
<img class="thumb-img" src="public/fig11/2.dinning_room/images/ds_640s.png" alt="Picture">
<figcaption class="caption thumb-text">Dinning Room (640s)</figcaption>
</figure>
</a>
</div>
</div>
</div>
</div> <!-- article -->
</div> <!-- content -->
</div> <!-- main -->
</div> <!-- camera -->
</body>
</html>