Efficient Caustic Rendering with Lightweight Photon Mapping

机译：高效的苛性苛刻的渲染与轻量级光子映射

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Abstract >Robust and efficient rendering of complex lighting effects, such as caustics, remains a challenging task. While algorithms like vertex connection and merging can render such effects robustly, their significant overhead over a simple path tracer is not always justified and – as we show in this paper ‐ also not necessary. In current rendering solutions, caustics often require the user to enable a specialized algorithm, usually a photon mapper, and hand‐tune its parameters. But even with carefully chosen parameters, photon mapping may still trace many photons that the path tracer could sample well enough, or, even worse, that are not visible at all. >Our goal is robust, yet lightweight, caustics rendering. To that end, we propose a technique to identify and focus computation on the photon paths that offer significant variance reduction over samples from a path tracer. We apply this technique in a rendering solution combining path tracing and photon mapping. The photon emission is automatically guided towards regions where the photons are useful, i.e., provide substantial variance reduction for the currently rendered image. Our method achieves better photon densities with fewer light paths (and thus photons) than emission guiding approaches based on visual importance. In addition, we automatically determine an appropriate number of photons for a given scene, and the algorithm gracefully degenerates to pure path tracing for scenes that do not benefit from photon mapping. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”> <标题类型=“main”>抽象</ title> >复杂的照明效果的鲁棒和有效渲染，例如焦化，仍然是一个具有挑战性的任务。虽然像顶点连接和合并等算法可以稳健地渲染这样的效果，但它们在简单路径示踪剂上的显着开销并不总是合理的，而且 - 如我们在本文中所展示 - 也没有必要。在当前的渲染解决方案中，苛性毒性通常要求用户启用专用算法，通常是光子映射器，并手动调整其参数。但是，即使有精心选择的参数，光子映射也可能仍然追踪许多光子，路径示踪剂可以很好地样本，或者甚至更差，完全不可见。</ p> >我们的目标是坚固的，但重量轻，腐蚀性渲染。为此，我们提出了一种技术来识别和聚焦在光子路径上的计算，该光子路径提供来自路径示踪剂的样本的显着变化。我们在结合路径跟踪和光子映射的渲染解决方案中应用该技术。光子发射被自动引导光子有用的区域，即，为当前呈现图像提供实质性的变化。我们的方法实现了比视觉重要性的发射引导方法更少的光路（并因此光子）的更好的光子密度。另外，我们自动确定给定场景的适当数量的光子，并且该算法优雅地退化为不受光子映射的场景的纯路径跟踪。</ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-16902/'>《Computer Graphics Forum: Journal of the European Association for Computer Graphics》</a> <b style="margin: 0 2px;">|</b><span>2018年第4期</span><b style="margin: 0 2px;">|</b><span>共10页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Grittmann Pascal&option=202" target="_blank" rel="nofollow">Grittmann Pascal;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Pérard‐Gayot Arsène&option=202" target="_blank" rel="nofollow">Pérard‐Gayot Arsène;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Slusallek Philipp&option=202" target="_blank" rel="nofollow">Slusallek Philipp;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=K?ivánek Jaroslav&option=202" target="_blank" rel="nofollow">K?ivánek Jaroslav;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Saarland University;</p> <p>Saarland University;</p> <p>Saarland University;</p> <p>Charles UniversityPrague;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/7754.html" title="计算机的应用">计算机的应用;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=CCS Concepts&option=203" rel="nofollow">CCS Concepts;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=? Computing methodologies → Ray tracing&option=203" rel="nofollow">? Computing methodologies → Ray tracing;</a> </p> <div class="translation"> 机译：CCS概念;? 计算方法→射线跟踪; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704022260261.html">Efficient Caustic Rendering with Lightweight Photon Mapping</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Grittmann Pascal&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Grittmann Pascal,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Pérard‐Gayot Arsène&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Pérard‐Gayot Arsène,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Slusallek Philipp&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Slusallek Philipp,</a> <a href="/journal-foreign-16902/" target="_blank" rel="nofollow" class="tuijian_authcolor">Computer Graphics Forum: Journal of the European Association for Computer Graphics .</a> <span>2018</span><span>,第4期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：高效的苛性苛刻的渲染与轻量级光子映射</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704021954888.html">Efficient rendering of caustics with streamed photon mapping</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Guzek K.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Guzek K.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Napieralski P.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Napieralski P. </a> <a href="/journal-foreign-15512/" target="_blank" rel="nofollow" class="tuijian_authcolor">Bulletin of the Polish Academy of Sciences. 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