Practical Global Illumination With Irradiance Caching

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Practical Global Illumination with Irradiance Caching

Jaroslav Krivanek,Pascal Gautron
Practical Global Illumination with Irradiance Caching Book PDF

Author : Jaroslav Krivanek,Pascal Gautron
Publisher : Morgan & Claypool Publishers
Page : 148 pages
File Size : 54,7 Mb
Release : 2009-07-08
Category : Technology & Engineering
ISBN : 9781598296457

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Practical Global Illumination with Irradiance Caching by Jaroslav Krivanek,Pascal Gautron Pdf

Irradiance caching is a ray tracing-based technique for computing global illumination on diffuse surfaces. Specifically, it addresses the computation of indirect illumination bouncing off one diffuse object onto another. The sole purpose of irradiance caching is to make this computation reasonably fast. The main idea is to perform the indirect illumination sampling only at a selected set of locations in the scene, store the results in a cache, and reuse the cached value at other points through fast interpolation. This book is for anyone interested in making a production-ready implementation of irradiance caching that reliably renders artifact-free images. Since its invention 20 years ago, the irradiance caching algorithm has been successfully used to accelerate global illumination computation in the Radiance lighting simulation system. Its widespread use had to wait until computers became fast enough to consider global illumination in film production rendering. Since then, its use is ubiquitous. Virtually all commercial and open-source rendering software base the global illumination computation upon irradiance caching. Although elegant and powerful, the algorithm in its basic form often fails to produce artifact-free mages. Unfortunately, practical information on implementing the algorithm is scarce. The main objective of this book is to show the irradiance caching algorithm along with all the details and tricks upon which the success of its practical implementation is dependent. In addition, we discuss some extensions of the basic algorithm, such as a GPU implementation for interactive global illumination computation and temporal caching that exploits temporal coherence to suppress flickering in animations. Our goal is to show the material without being overly theoretical. However, the reader should have some basic understanding of rendering concepts, ray tracing in particular. Familiarity with global illumination is useful but not necessary to read this book. Table of Contents: Introduction to Ray Tracing and Global Illumination / Irradiance Caching Core / Practical Rendering with Irradiance Caching / Irradiance Caching in a Complete Global Illumination / Irradiance Caching on Graphics Hardware / Temporal Irradiance Caching

Practical Global Illumination with Irradiance Caching

Jaroslav Krivanek,Pascal Gautron
Practical Global Illumination with Irradiance Caching Book PDF

Author : Jaroslav Krivanek,Pascal Gautron
Publisher : Springer Nature
Page : 134 pages
File Size : 46,5 Mb
Release : 2022-05-31
Category : Mathematics
ISBN : 9783031795404

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Practical Global Illumination with Irradiance Caching by Jaroslav Krivanek,Pascal Gautron Pdf

Irradiance caching is a ray tracing-based technique for computing global illumination on diffuse surfaces. Specifically, it addresses the computation of indirect illumination bouncing off one diffuse object onto another. The sole purpose of irradiance caching is to make this computation reasonably fast. The main idea is to perform the indirect illumination sampling only at a selected set of locations in the scene, store the results in a cache, and reuse the cached value at other points through fast interpolation. This book is for anyone interested in making a production-ready implementation of irradiance caching that reliably renders artifact-free images. Since its invention 20 years ago, the irradiance caching algorithm has been successfully used to accelerate global illumination computation in the Radiance lighting simulation system. Its widespread use had to wait until computers became fast enough to consider global illumination in film production rendering. Since then, its use is ubiquitous. Virtually all commercial and open-source rendering software base the global illumination computation upon irradiance caching. Although elegant and powerful, the algorithm in its basic form often fails to produce artifact-free mages. Unfortunately, practical information on implementing the algorithm is scarce. The main objective of this book is to show the irradiance caching algorithm along with all the details and tricks upon which the success of its practical implementation is dependent. In addition, we discuss some extensions of the basic algorithm, such as a GPU implementation for interactive global illumination computation and temporal caching that exploits temporal coherence to suppress flickering in animations. Our goal is to show the material without being overly theoretical. However, the reader should have some basic understanding of rendering concepts, ray tracing in particular. Familiarity with global illumination is useful but not necessary to read this book. Table of Contents: Introduction to Ray Tracing and Global Illumination / Irradiance Caching Core / Practical Rendering with Irradiance Caching / Irradiance Caching in a Complete Global Illumination / Irradiance Caching on Graphics Hardware / Temporal Irradiance Caching

Transactions on Computational Science XIX

Marina L. Gavrilova,C.J. Kenneth Tan,Anton Konushin
Transactions on Computational Science XIX Book PDF

Author : Marina L. Gavrilova,C.J. Kenneth Tan,Anton Konushin
Publisher : Springer
Page : 169 pages
File Size : 44,7 Mb
Release : 2013-07-05
Category : Computers
ISBN : 9783642397592

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Transactions on Computational Science XIX by Marina L. Gavrilova,C.J. Kenneth Tan,Anton Konushin Pdf

The 19th issue of the Transactions on Computational Science journal, edited by Anton Konushin, is devoted to the topic of computer graphics. The 12 papers in the volume constitute revised and extended versions of a selection of contributions presented at GRAPHICON 2012, the 22nd International Conference on Computer Graphics and Vision, held in Moscow, Russia, in October 2012. The selected papers span the areas of scientific visualization, ray tracing, image processing, virtual reality, and stereo vision.

Realistic Image Synthesis Using Photon Mapping

Henrik Wann Jensen
Realistic Image Synthesis Using Photon Mapping Book PDF

Author : Henrik Wann Jensen
Publisher : A K Peters/CRC Press
Page : 0 pages
File Size : 41,7 Mb
Release : 2009-01-05
Category : Computers
ISBN : 1568814623

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Realistic Image Synthesis Using Photon Mapping by Henrik Wann Jensen Pdf

Photon mapping, an extension of ray tracing, makes it possible to efficiently simulate global illumination in complex scenes. Photon mapping can simulate caustics (focused light, like shimmering waves at the bottom of a swimming pool), diffuse inter-reflections (e.g., the "bleeding" of colored light from a red wall onto a white floor, giving the floor a reddish tint), and participating media (such as clouds or smoke). This book is a practical guide to photon mapping; it provides the theory and practical insight necessary to implement photon mapping and simulate all types of direct and indirect illumination efficiently.

Physically Based Rendering

Matt Pharr,Greg Humphreys
Physically Based Rendering Book PDF

Author : Matt Pharr,Greg Humphreys
Publisher : Morgan Kaufmann
Page : 1201 pages
File Size : 54,9 Mb
Release : 2010-06-28
Category : Computers
ISBN : 9780123750792

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Physically Based Rendering by Matt Pharr,Greg Humphreys Pdf

This updated edition describes both the mathematical theory behind a modern photorealistic rendering system as well as its practical implementation. Through the ideas and software in this book, designers will learn to design and employ a full-featured rendering system for creating stunning imagery. Includes a companion site complete with source code for the rendering system described in the book, with support for Windows, OS X, and Linux.

Handbook of Digital Image Synthesis

Vincent Pegoraro
Handbook of Digital Image Synthesis Book PDF

Author : Vincent Pegoraro
Publisher : CRC Press
Page : 955 pages
File Size : 52,8 Mb
Release : 2016-12-12
Category : Computers
ISBN : 9781315395203

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Handbook of Digital Image Synthesis by Vincent Pegoraro Pdf

The Handbook of Digital Image Synthesis is the most up-to-date reference guide in the rapidly developing field of computer graphics. A wide range of topics, such as, applied mathematics, data structures, and optical perception and imaging help to provide a well-rounded view of the necessary formulas for computer rendering. In addition to this diverse approach, the presentation of the material is substantiated by numerous figures and computer-generated images. From basic principles to advanced theories, this book, provides the reader with a strong foundation of computer formulas and rendering through a step-by-step process. . Key Features: Provides unified coverage of the broad range of fundamental topics in rendering Gives in-depth treatment of the basic and advanced concepts in each topic Presents a step-by-step derivation of the theoretical results needed for implementation Illustrates the concepts with numerous figures and computer-generated images Illustrates the core algorithms using platform-independent pseudo-code

Ray Tracing Gems

Eric Haines,Tomas Akenine-Möller
Ray Tracing Gems Book PDF

Author : Eric Haines,Tomas Akenine-Möller
Publisher : Apress
Page : 622 pages
File Size : 44,7 Mb
Release : 2019-02-25
Category : Computers
ISBN : 9781484244272

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Ray Tracing Gems by Eric Haines,Tomas Akenine-Möller Pdf

This book is a must-have for anyone serious about rendering in real time. With the announcement of new ray tracing APIs and hardware to support them, developers can easily create real-time applications with ray tracing as a core component. As ray tracing on the GPU becomes faster, it will play a more central role in real-time rendering. Ray Tracing Gems provides key building blocks for developers of games, architectural applications, visualizations, and more. Experts in rendering share their knowledge by explaining everything from nitty-gritty techniques that will improve any ray tracer to mastery of the new capabilities of current and future hardware. What you'll learn: The latest ray tracing techniques for developing real-time applications in multiple domains Guidance, advice, and best practices for rendering applications with Microsoft DirectX Raytracing (DXR) How to implement high-performance graphics for interactive visualizations, games, simulations, and more Who this book is for:Developers who are looking to leverage the latest APIs and GPU technology for real-time rendering and ray tracing Students looking to learn about best practices in these areas Enthusiasts who want to understand and experiment with their new GPUs

Efficient Quadrature Rules for Illumination Integrals

Ricardo Marques,Christian Bouville,Luís Paulo Santos,Kadi Bouatouch
Efficient Quadrature Rules for Illumination Integrals Book PDF

Author : Ricardo Marques,Christian Bouville,Luís Paulo Santos,Kadi Bouatouch
Publisher : Springer Nature
Page : 82 pages
File Size : 45,7 Mb
Release : 2022-06-01
Category : Mathematics
ISBN : 9783031795671

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Efficient Quadrature Rules for Illumination Integrals by Ricardo Marques,Christian Bouville,Luís Paulo Santos,Kadi Bouatouch Pdf

Rendering photorealistic images is a costly process which can take up to several days in the case of high quality images. In most cases, the task of sampling the incident radiance function to evaluate the illumination integral is responsible for an important share of the computation time. Therefore, to reach acceptable rendering times, the illumination integral must be evaluated using a limited set of samples. Such a restriction raises the question of how to obtain the most accurate approximation possible with such a limited set of samples. One must thus ensure that sampling produces the highest amount of information possible by carefully placing and weighting the limited set of samples. Furthermore, the integral evaluation should take into account not only the information brought by sampling but also possible information available prior to sampling, such as the integrand smoothness. This idea of sparse information and the need to fully exploit the little information available is present throughout this book. The presented methods correspond to the state-of-the-art solutions in computer graphics, and take into account information which had so far been underexploited (or even neglected) by the previous approaches. The intended audiences are Ph.D. students and researchers in the field of realistic image synthesis or global illumination algorithms, or any person with a solid background in graphics and numerical techniques.

Virtual Crowds

Mubbasir Kapadia,Nuria Pelechano,Jan Allbeck,Norm Badler
Virtual Crowds Book PDF

Author : Mubbasir Kapadia,Nuria Pelechano,Jan Allbeck,Norm Badler
Publisher : Springer Nature
Page : 248 pages
File Size : 54,8 Mb
Release : 2022-05-31
Category : Mathematics
ISBN : 9783031025860

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Virtual Crowds by Mubbasir Kapadia,Nuria Pelechano,Jan Allbeck,Norm Badler Pdf

This volume presents novel computational models for representing digital humans and their interactions with other virtual characters and meaningful environments. In this context, we describe efficient algorithms to animate, control, and author human-like agents having their own set of unique capabilities, personalities, and desires. We begin with the lowest level of footstep determination to steer agents in collision-free paths. Steering choices are controlled by navigation in complex environments, including multi-domain planning with dynamically changing situations. Virtual agents are given perceptual capabilities analogous to those of real people, including sound perception, multi-sense attention, and understanding of environment semantics which affect their behavior choices. The roles and impacts of individual attributes, such as memory and personality are explored. The animation challenges of integrating a number of simultaneous behavior and movement demands on an agent are addressed through an open source software system. Finally, the creation of stories and narratives with groups of agents subject to planning and environmental constraints culminates the presentation.

An Introduction to Laplacian Spectral Distances and Kernels

Giuseppe Patanè
An Introduction to Laplacian Spectral Distances and Kernels Book PDF

Author : Giuseppe Patanè
Publisher : Springer Nature
Page : 120 pages
File Size : 53,5 Mb
Release : 2022-05-31
Category : Mathematics
ISBN : 9783031025938

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An Introduction to Laplacian Spectral Distances and Kernels by Giuseppe Patanè Pdf

In geometry processing and shape analysis, several applications have been addressed through the properties of the Laplacian spectral kernels and distances, such as commute time, biharmonic, diffusion, and wave distances. Within this context, this book is intended to provide a common background on the definition and computation of the Laplacian spectral kernels and distances for geometry processing and shape analysis. To this end, we define a unified representation of the isotropic and anisotropic discrete Laplacian operator on surfaces and volumes; then, we introduce the associated differential equations, i.e., the harmonic equation, the Laplacian eigenproblem, and the heat equation. Filtering the Laplacian spectrum, we introduce the Laplacian spectral distances, which generalize the commute-time, biharmonic, diffusion, and wave distances, and their discretization in terms of the Laplacian spectrum. As main applications, we discuss the design of smooth functions and the Laplacian smoothing of noisy scalar functions. All the reviewed numerical schemes are discussed and compared in terms of robustness, approximation accuracy, and computational cost, thus supporting the reader in the selection of the most appropriate with respect to shape representation, computational resources, and target application.

Information Theory Tools for Computer Graphics

Mateu Sbert,Miquel Feixas,Jaume Rigau,Miguel Chover,Ivan Viola
Information Theory Tools for Computer Graphics Book PDF

Author : Mateu Sbert,Miquel Feixas,Jaume Rigau,Miguel Chover,Ivan Viola
Publisher : Springer Nature
Page : 153 pages
File Size : 40,6 Mb
Release : 2022-06-01
Category : Mathematics
ISBN : 9783031795466

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Information Theory Tools for Computer Graphics by Mateu Sbert,Miquel Feixas,Jaume Rigau,Miguel Chover,Ivan Viola Pdf

Information theory (IT) tools, widely used in scientific fields such as engineering, physics, genetics, neuroscience, and many others, are also emerging as useful transversal tools in computer graphics. In this book, we present the basic concepts of IT and how they have been applied to the graphics areas of radiosity, adaptive ray-tracing, shape descriptors, viewpoint selection and saliency, scientific visualization, and geometry simplification. Some of the approaches presented, such as the viewpoint techniques, are now the state of the art in visualization. Almost all of the techniques presented in this book have been previously published in peer-reviewed conference proceedings or international journals. Here, we have stressed their common aspects and presented them in an unified way, so the reader can clearly see which problems IT tools can help solve, which specific tools to use, and how to apply them. A basic level of knowledge in computer graphics is required but basic concepts in IT are presented. The intended audiences are both students and practitioners of the fields above and related areas in computer graphics. In addition, IT practitioners will learn about these applications. Table of Contents: Information Theory Basics / Scene Complexity and Refinement Criteria for Radiosity / Shape Descriptors / Refinement Criteria for Ray-Tracing / Viewpoint Selection and Mesh Saliency / View Selection in Scientific Visualization / Viewpoint-based Geometry Simplification

Finite Element Method Simulation of 3D Deformable Solids

Eftychios Sifakis,Jernej Barbič
Finite Element Method Simulation of 3D Deformable Solids Book PDF

Author : Eftychios Sifakis,Jernej Barbič
Publisher : Springer Nature
Page : 57 pages
File Size : 48,5 Mb
Release : 2022-06-01
Category : Mathematics
ISBN : 9783031025853

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Finite Element Method Simulation of 3D Deformable Solids by Eftychios Sifakis,Jernej Barbič Pdf

This book serves as a practical guide to simulation of 3D deformable solids using the Finite Element Method (FEM). It reviews a number of topics related to the theory and implementation of FEM approaches: measures of deformation, constitutive laws of nonlinear materials, tetrahedral discretizations, and model reduction techniques for real-time simulation. Simulations of deformable solids are important in many applications in computer graphics, including film special effects, computer games, and virtual surgery. The Finite Element Method has become a popular tool in many such applications. Variants of FEM catering to both offline and real-time simulation have had a mature presence in computer graphics literature. This book is designed for readers familiar with numerical simulation in computer graphics, who would like to obtain a cohesive picture of the various FEM simulation methods available, their strengths and weaknesses, and their applicability in various simulation scenarios. The book is also a practical implementation guide for the visual effects developer, offering a lean yet adequate synopsis of the underlying mathematical theory. Chapter 1 introduces the quantitative descriptions used to capture the deformation of elastic solids, the concept of strain energy, and discusses how force and stress result as a response to deformation. Chapter 2 reviews a number of constitutive models, i.e., analytical laws linking deformation to the resulting force that has successfully been used in various graphics-oriented simulation tasks. Chapter 3 summarizes how deformation and force can be computed discretely on a tetrahedral mesh, and how an implicit integrator can be structured around this discretization. Finally, chapter 4 presents the state of the art in model reduction techniques for real-time FEM solid simulation and discusses which techniques are suitable for which applications. Topics discussed in this chapter include linear modal analysis, modal warping, subspace simulation, and domain decomposition.

Mathematical Basics of Motion and Deformation in Computer Graphics

Ken Anjyo,Hiroyuki Ochiai
Mathematical Basics of Motion and Deformation in Computer Graphics Book PDF

Author : Ken Anjyo,Hiroyuki Ochiai
Publisher : Morgan & Claypool Publishers
Page : 97 pages
File Size : 45,7 Mb
Release : 2017-04-13
Category : Computers
ISBN : 9781627059848

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Mathematical Basics of Motion and Deformation in Computer Graphics by Ken Anjyo,Hiroyuki Ochiai Pdf

This synthesis lecture presents an intuitive introduction to the mathematics of motion and deformation in computer graphics. Starting with familiar concepts in graphics, such as Euler angles, quaternions, and affine transformations, we illustrate that a mathematical theory behind these concepts enables us to develop the techniques for efficient/effective creation of computer animation. This book, therefore, serves as a good guidepost to mathematics (differential geometry and Lie theory) for students of geometric modeling and animation in computer graphics. Experienced developers and researchers will also benefit from this book, since it gives a comprehensive overview of mathematical approaches that are particularly useful in character modeling, deformation, and animation.

Numerical Methods for Linear Complementarity Problems in Physics-Based Animation

Sarah Niebe,Kenny Erleben
Numerical Methods for Linear Complementarity Problems in Physics Based Animation Book PDF

Author : Sarah Niebe,Kenny Erleben
Publisher : Springer Nature
Page : 151 pages
File Size : 43,6 Mb
Release : 2022-05-31
Category : Mathematics
ISBN : 9783031795640

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Numerical Methods for Linear Complementarity Problems in Physics-Based Animation by Sarah Niebe,Kenny Erleben Pdf

Linear complementarity problems (LCPs) have for many years been used in physics-based animation to model contact forces between rigid bodies in contact. More recently, LCPs have found their way into the realm of fluid dynamics. Here, LCPs are used to model boundary conditions with fluid-wall contacts. LCPs have also started to appear in deformable models and granular simulations. There is an increasing need for numerical methods to solve the resulting LCPs with all these new applications. This book provides a numerical foundation for such methods, especially suited for use in computer graphics. This book is mainly intended for a researcher/Ph.D. student/post-doc/professor who wants to study the algorithms and do more work/research in this area. Programmers might have to invest some time brushing up on math skills, for this we refer to Appendices A and B. The reader should be familiar with linear algebra and differential calculus. We provide pseudo code for all the numerical methods, which should be comprehensible by any computer scientist with rudimentary programming skills. The reader can find an online supplementary code repository, containing Matlab implementations of many of the core methods covered in these notes, as well as a few Python implementations [Erleben, 2011]. Table of Contents: Introduction / Numerical Methods / Guide for Software and Selecting Methods / Bibliography / Authors' Biographies

Stochastic Partial Differential Equations for Computer Vision with Uncertain Data

Tobias Preusser,Robert M. Kirby,Torben Pätz
Stochastic Partial Differential Equations for Computer Vision with Uncertain Data Book PDF

Author : Tobias Preusser,Robert M. Kirby,Torben Pätz
Publisher : Springer Nature
Page : 150 pages
File Size : 48,7 Mb
Release : 2022-06-01
Category : Mathematics
ISBN : 9783031025945

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Stochastic Partial Differential Equations for Computer Vision with Uncertain Data by Tobias Preusser,Robert M. Kirby,Torben Pätz Pdf

In image processing and computer vision applications such as medical or scientific image data analysis, as well as in industrial scenarios, images are used as input measurement data. It is good scientific practice that proper measurements must be equipped with error and uncertainty estimates. For many applications, not only the measured values but also their errors and uncertainties, should be—and more and more frequently are—taken into account for further processing. This error and uncertainty propagation must be done for every processing step such that the final result comes with a reliable precision estimate. The goal of this book is to introduce the reader to the recent advances from the field of uncertainty quantification and error propagation for computer vision, image processing, and image analysis that are based on partial differential equations (PDEs). It presents a concept with which error propagation and sensitivity analysis can be formulated with a set of basic operations. The approach discussed in this book has the potential for application in all areas of quantitative computer vision, image processing, and image analysis. In particular, it might help medical imaging finally become a scientific discipline that is characterized by the classical paradigms of observation, measurement, and error awareness. This book is comprised of eight chapters. After an introduction to the goals of the book (Chapter 1), we present a brief review of PDEs and their numerical treatment (Chapter 2), PDE-based image processing (Chapter 3), and the numerics of stochastic PDEs (Chapter 4). We then proceed to define the concept of stochastic images (Chapter 5), describe how to accomplish image processing and computer vision with stochastic images (Chapter 6), and demonstrate the use of these principles for accomplishing sensitivity analysis (Chapter 7). Chapter 8 concludes the book and highlights new research topics for the future.