A Simple and Robust Mutation Strategy for the Metropolis Light Transport Algorithm

Kelemen, Csaba; Szirmay‐Kalos, László; György, András; Csonka, Ferenc

doi:10.1111/1467-8659.00703

Cited by 34 publications

(47 citation statements)

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“…Although capable of dealing with complex situations, the main issue for the basic BDPT is excessive noise. This has been addressed by variety of improvement techniques such as Metropolis Light Transport (MLT) [49] [50], Gradient-Domain Bidirectional Path Tracing (G-BDPT) [51], Energy Redistribution Path Tracing (ERPT) [52], Gradient-domain Metropolis Light Transport (G-MLT) [53], Primary Space Simple Metropolis Light Transport (PSSMLT) [54] and particularly interesting Manifold Exploration Path Tracing (MEPT) [55]. Latter chooses mutation in paths to calculate specular regions and caustics and produce smooth results efficiently.…”

Section: Stochastic (Monte Carlo) Based Methods -Ray Tracingmentioning

confidence: 99%

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Jakica

2018

Renewable and Sustainable Energy Reviews

142

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Solar design can take many different forms across disciplines with different methodologies and goals, ranging from acquiring architectural visual effects to assessing illumination for daylighting and solar radiation potential on building surfaces for PV implementation. Furthermore, a capability of solar design methodologies and tools to accurately and time efficiently simulate light phenomena can greatly influence performance results and design decisions. This is especially important in complex cases such as dense urban settings with the significant surface shadowing, and vertical facades including daylighting devices and photovoltaics. Consequently, choosing a suitable approach and tool for each design phase is essential for achieving unique design and performance goals. This paper was carried out within the framework of IEA-PVPS Task 15 -BIPV and it aims to facilitate this decision for all parties involved in solar design process. Here presented, is an overview of almost 200 solar design tools, analyzing their numerous features regarding accuracy, complexity, scale, computation speed, representation as well as building design process integration in about 50 2D/3D, CAD/CAM and BIM software environments. Furthermore, tools from various fields have been analysed in a broad interdisciplinary context of solar design with a particular attention for being used for Daylighting and Building-Integrated Photovoltaics (BIPV) purposes. This approach should open many new perspectives on a potentially wider multidisciplinary usage and interpretation of solar design tools, sometimes well beyond their initial scope of work.

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Section: Stochastic (Monte Carlo) Based Methods -Ray Tracingmentioning

confidence: 99%

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Jakica

2018

Renewable and Sustainable Energy Reviews

142

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“…Именно так и было сделано в самой первой работе по MLT [19], где алгоритм Метрополи-са был предложен для BPT и использованы переходы в пространстве путей (path space) как небольшие изменения позиций вершин пути. В дальнейшем в работе [23] алгоритм Метрополиса был применён и к однонаправленной, и к двунаправленной трассировке путей с многократной выборкой по значимости. При этом уже были использованы переходы в так называемом первичном про-странстве путей (primary sample space, PSSMLT) -многомерном единичном кубе, в котором генерировались случайные числа.…”

Section: 2unclassified

“…При этом уже были использованы переходы в так называемом первичном про-странстве путей (primary sample space, PSSMLT) -многомерном единичном кубе, в котором генерировались случайные числа. Причём в работе [23] допол-нительно предлагается смешивать результаты работы алгоритма Метрополиса и обычного Монте-Карло при помощи того же самого механизма многократной выборки по значимости, что улучшает свойства алгоритма в тёмных участках изображения.…”

Section: 2unclassified

Selective application of Metropolis Light Transport for hard sampling illumination phenomena

Frolov

2017

KIAM Prepr.

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“…A variant of MLT, which can be simpler to implement in practice is the Primary Sample Space MLT (PSSMLT) algorithm proposed by Kelemen et al [110]. Instead of directly proposing changes to the path vertices, this method is based on The images were all rendered using the Mitsuba render [94] in five minutes using 64 Amazon EC2 vCPUs.…”

Section: Primary Sample Space Mlt (Pssmlt)mentioning

confidence: 99%

“…where p(x) is the path sampling probability of the underlying path tracer, for more details we refer to [110]. This integral can now be approximated using MCMC by sampling proportional to…”

Section: Primary Sample Space Mlt (Pssmlt)mentioning

confidence: 99%

Physically Based Rendering of Synthetic Objects in Real Environments

Kronander¹

2015

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Description of the cover imageRendering of virtual furniture illuminated with spatially varying real world illumination captured in a physical environment at IKEA Communications AB.The virtual scene was modeled by Sören and Per Larsson. Physically based rendering of synthetic objects in real environmentsCopyright © 2015 Joel Kronander (unless otherwise noted) Division of Media and Information TechnologyDepartment of Science and Technology Campus Norrköping, Printed in Sweden by LiU-Tryck, Linköping, 2015 AbstractThis thesis presents methods for photorealistic rendering of virtual objects so that they can be seamlessly composited into images of the real world. To generate predictable and consistent results, we study physically based methods, which simulate how light propagates in a mathematical model of the augmented scene. This computationally challenging problem demands both efficient and accurate simulation of the light transport in the scene, as well as detailed modeling of the geometries, illumination conditions, and material properties. In this thesis, we discuss and formulate the challenges inherent in these steps and present several methods to make the process more efficient.In particular, the material contained in this thesis addresses four closely related areas: HDR imaging, IBL, reflectance modeling, and efficient rendering. The thesis presents a new, statistically motivated algorithm for HDR reconstruction from raw camera data combining demosaicing, denoising, and HDR fusion in a single processing operation. The thesis also presents practical and robust methods for rendering with spatially and temporally varying illumination conditions captured using omnidirectional HDR video. Furthermore, two new parametric BRDF models are proposed for surfaces exhibiting wide angle gloss. Finally, the thesis also presents a physically based light transport algorithm based on Markov Chain Monte Carlo methods that allows approximations to be used in place of exact quantities, while still converging to the exact result. As illustrated in the thesis, the proposed algorithm enables efficient rendering of scenes with glossy transfer and heterogenous participating media.v Populärvetenskaplig SammanfattningEn av de största utmaningarna inom datorgrafik är att syntetisera, eller rendera, fotorealistiska bilder. Fotorealistisk rendering används idag inom många tillämpningsområden såsom specialeffekter i film, datorspel, produktvisualisering och virtuell verklighet. I många praktiska tillämpningar av fotorealistisk rendering är det viktigt att kunna placera in virtuella objekt i fotografier, så att de virtuella objekten ser verkliga ut. IKEA-katalogen, till exempel, produceras i många olika versioner för att passa olika länder och regioner. Grunden till de flesta bilderna i katalogen är oftast densamma, men symboler och standardmått på möbler varierar ofta för olika versioner av katalogen. Istället för att fotografera varje version separat kan man använda ett grundfotografi och lägga in olika virtuella objekt såsom möbler...

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A Simple and Robust Mutation Strategy for the Metropolis Light Transport Algorithm

Abstract: This paper presents a new mutation strategy for the Metropolis light transport algorithm, which works in the unit

Cited by 34 publications

References 3 publications

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Selective application of Metropolis Light Transport for hard sampling illumination phenomena

Physically Based Rendering of Synthetic Objects in Real Environments

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