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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<title>Enhancing Photorealism Enhancement</title>
<!-- Bootstrap -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous"/>
<link rel="stylesheet" href="website/css/BeerSlider.css"/>
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
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<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<main>
<div class="container" style="max-width: 970px;">
<div class="row">
<div class="col">
<h1 class="text-center">Enhancing Photorealism Enhancement</h1>
<div class="col-xs-2"></div>
<div class="col-xs-2 text-center">
<a href="http://www.stephanrichter.org">Stephan Richter</a>
<p>Intel Labs</p>
</div>
<div class="col-xs-4 text-center">
<a href="https://hassanhaija.github.io/">Hassan Abu AlHaija</a>
<p>PCH Innovations / Intel Labs<sup>1</sup></p>
</div>
<div class="col-xs-2">
<a href="http://vladlen.info">Vladlen Koltun</a>
<p>Intel Labs</p>
</div>
<div class="col-xs-2"></div>
</div>
</div>
<div class="row">
<div class="col text-center">
<p><sup>1</sup>work done while an intern at Intel Labs</p>
</div>
</div>
<div class="row">
<div class="col">
<h3 class="text-center">Abstract</h3>
<p>
We present an approach to enhancing the realism of synthetic images. The images are enhanced by a convolutional network that leverages intermediate representations produced by conventional rendering pipelines. The network is trained via a novel adversarial objective, which provides strong supervision at multiple perceptual levels. We analyze scene layout distributions in commonly used datasets and find that they differ in important ways. We hypothesize that this is one of the causes of strong artifacts that can be observed in the results of many prior methods. To address this we propose a new strategy for sampling image patches during training. We also introduce multiple architectural improvements in the deep network modules used for photorealism enhancement. We confirm the benefits of our contributions in controlled experiments and report substantial gains in stability and realism in comparison to recent image-to-image translation methods and a variety of other baselines.
</p>
</div>
</div>
<div class="row">
<div class="col-md-2">
<h3>Paper</h3>
<p>
<a href="http://vladlen.info/papers/EPE.pdf">
<img src="website/img/thumb_paper.png" alt="Paper" class="img-thumbnail" style="height: 155px;"/>
</a>
</p>
</div>
<div class="col-md-10">
<h3>BibTeX</h3>
<p>Please cite our work if you use code or data from this site.</p>
<pre><code class="language-latex">@Article{Richter_2021,
title = {Enhancing Photorealism Enhancement},
author = {Stephan R. Richter and Hassan Abu AlHaija and Vladlen Koltun},
journal= {arXiv:2105.04619},
year = {2021},
}</code></pre>
</div>
</div>
<div class="row">
<div class="col-md-6">
<h3>Video (Paper)</h2>
<p>
<iframe width="450" height="253" src="https://www.youtube.com/embed/P1IcaBn3ej0?t=11" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</p>
</div>
<div class="col-md-6">
<h3>Video (Keynote at Eurographics 2021)</h2>
<p>
<iframe width="450" height="253" src="https://www.youtube.com/embed/yLLhMkctfBY?t=2360" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</p>
</div>
</div>
<div class="row">
<div class="col">
<h3 class="text-center"><a href="https://github.com/isl-org/PhotorealismEnhancement">Code & Data</a></h3>
</div>
</div>
<div class="row">
<div class="col">
<h2 class="text-center">Results</h2>
<h3 class="text-center">GTA V to <a href="https://www.cityscapes-dataset.com">Cityscapes</a></h3>
<p>The modifications by our method are geometrically and semantically consistent with the original images.</p>
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="40">
<img src="website/img/ours_cs/01-13-16-20_34503.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/01-13-16-20_34503.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<p>They are also temporally stable:</p>
<iframe width="960" height="540" src="https://www.youtube.com/embed/P1IcaBn3ej0?t=11" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>
</div>
<div class="row">
<div class="col">
<p>It greens the parched grass and hills in GTA's California:</p>
<div id="beer-slider" class="beer-slider" data-beer-label="after" data-beer-start="25">
<img src="website/img/ours_cs/01-16-20-18_12025.jpg" alt="">
<div class="beer-reveal" data-beer-label="before">
<img src="website/img/gta/01-16-20-18_12025.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<p>It adds reflections to the windows and increases the fresnel effect (e.g., at the roof of cars):</p>
<div id="beer-slider" class="beer-slider" data-beer-label="after" data-beer-start="25">
<img src="website/img/ours_cs/17328.jpg" alt="">
<div class="beer-reveal" data-beer-label="before">
<img src="website/img/gta/17328.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<p>It rebuilds the roads:</p>
<div id="beer-slider" class="beer-slider" data-beer-label="after" data-beer-start="25">
<img src="website/img/ours_cs/17651.jpg" alt="">
<div class="beer-reveal" data-beer-label="before">
<img src="website/img/gta/17651.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_cs/02630.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/02630.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_cs/17991.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/17991.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_cs/18099.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/18099.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<h3 class="text-center">Translating GTA V to <a href="https://www.mapillary.com/dataset/vistas">Mapillary Vistas</a>.</h3>
<p>Images from this dataset are recorded around the world with wide variety of cameras. The images are more vibrant and of high resolution.</p>
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/01-12-19-23_36568.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/01-12-19-23_36568.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<p>It removes distant haze and rebuilds the road:</p>
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/00373.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/00373.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/05949.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/05949.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/06623.jpg" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/06623.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<p>Grass becomes more voluminous:</p>
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/01316.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/01316.jpg" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/05130.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/05130.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="25">
<img src="website/img/ours_vistas/04112.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/04112.png" alt="">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div id="beer-slider" class="beer-slider" data-beer-label="Ours" data-beer-start="40">
<img src="website/img/ours_vistas/08077.png" alt="">
<div class="beer-reveal" data-beer-label="GTA V">
<img src="website/img/gta/08077.png" alt="">
</div>
</div>
</div>
</div>
</div>
</main>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://code.jquery.com/jquery-1.12.4.min.js" integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ" crossorigin="anonymous"></script>
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