Ebook: Photorealism in Computer Graphics

The goal of this book is to present the most advanced research works in realistic computer generated images. It is made up of the papers presented during a Eurographics workshop that has been held in Rennes (France) on June 1990. Although realism in computer graphics has existed for many years, we have considered that two research directions can now clearly be identified. One makes use of empirical methods to efficiently create images that look real. As opposed to this approach, the other orientation makes use of physics to produce images that are exact representations of the real world (at the expense of additional processing time), hence the term photosimulation which indeed was the subject of this book. The objectives of this workshop were to assemble experts from physics and computer graphics in order to contribute to the introduction of physics-based approaches in the field of computer generated images. The fact that this workshop was the first entirely devoted to this topic was a bet and fortunately it turned out that it was a success. The contents of this book is organized in five chapters: Efficient Ray Tracing Meth­ ods, Theory of Global Illumination Models, Photometric Algorithms, Form-Factor Cal­ culations and Physics-Based Methods.

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The goal of this book is to present the most advanced research work in realistic computer generated images. It contains the papers presented during a Eurographics workshop held in Rennes, France, in June 1990. The objective of this workshop was to assemble experts from physics and computer graphics to contribute to the introduction of physics-based approaches in the field of computer generated images. The book begins with an overview on realistic imagery that discusses the main issues in radiosity and describes the most recent developments. The first chapter gives a description of improved ray tracing techniques for animated scenes and parametric surfaces. The second chapter develops the theoretical aspects of global illumination models. The third chapter presents two algorithms that try to combine radiosity and ray tracing to cope with a wide class of photometric problems. The fourth chapter describes techniques aiming at efficient evaluation of form factors. The last chapter gives examples showing how physics can be used to solve some rendering problems such as interference, simulation of area light sources, and light propagation through media.

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The goal of this book is to present the most advanced research work in realistic computer generated images. It contains the papers presented during a Eurographics workshop held in Rennes, France, in June 1990. The objective of this workshop was to assemble experts from physics and computer graphics to contribute to the introduction of physics-based approaches in the field of computer generated images. The book begins with an overview on realistic imagery that discusses the main issues in radiosity and describes the most recent developments. The first chapter gives a description of improved ray tracing techniques for animated scenes and parametric surfaces. The second chapter develops the theoretical aspects of global illumination models. The third chapter presents two algorithms that try to combine radiosity and ray tracing to cope with a wide class of photometric problems. The fourth chapter describes techniques aiming at efficient evaluation of form factors. The last chapter gives examples showing how physics can be used to solve some rendering problems such as interference, simulation of area light sources, and light propagation through media.
Content:
Front Matter....Pages I-XVI
Front Matter....Pages 1-1
Trends in Radiosity for Image Synthesis....Pages 3-13
Front Matter....Pages 15-15
Incremental Ray Tracing....Pages 17-32
Parametric Surfaces and Ray Tracing....Pages 33-53
Front Matter....Pages 55-55
A Theoretical Analysis of Global Illumination Models....Pages 57-71
Physically Based Lighting Calculations for Computer Graphics: A Modern Perspective....Pages 73-83
Efficient Radiosity Methods for Non-Separable Reflectance Models....Pages 85-97
Front Matter....Pages 99-99
A Progressive Ray-Tracing-based Radiosity with General Reflectance Functions....Pages 101-113
A Two-Pass Radiosity Method for B?zier Patches....Pages 115-124
Front Matter....Pages 125-125
The Hemisphere Radiosity Method: A Tale of Two Algorithms....Pages 127-135
Exploiting Coherence for Clipping and View Transformations in Radiosity Algorithms....Pages 137-149
A Rapid Hierarchical Radiosity Algorithm for Unoccluded Environments....Pages 151-169
Fast Radiosity by Parallelization....Pages 171-181
Front Matter....Pages 183-183
Newton’s Colors: Simulating Interference Phenomena in Realistic Image Synthesis....Pages 185-194
Light Sources in a Ray Tracing Environment....Pages 195-210
Methods for Efficient Sampling of Arbitrarily Distributed Volume Densities....Pages 211-230
Back Matter....Pages 231-232

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The goal of this book is to present the most advanced research work in realistic computer generated images. It contains the papers presented during a Eurographics workshop held in Rennes, France, in June 1990. The objective of this workshop was to assemble experts from physics and computer graphics to contribute to the introduction of physics-based approaches in the field of computer generated images. The book begins with an overview on realistic imagery that discusses the main issues in radiosity and describes the most recent developments. The first chapter gives a description of improved ray tracing techniques for animated scenes and parametric surfaces. The second chapter develops the theoretical aspects of global illumination models. The third chapter presents two algorithms that try to combine radiosity and ray tracing to cope with a wide class of photometric problems. The fourth chapter describes techniques aiming at efficient evaluation of form factors. The last chapter gives examples showing how physics can be used to solve some rendering problems such as interference, simulation of area light sources, and light propagation through media.
Content:
Front Matter....Pages I-XVI
Front Matter....Pages 1-1
Trends in Radiosity for Image Synthesis....Pages 3-13
Front Matter....Pages 15-15
Incremental Ray Tracing....Pages 17-32
Parametric Surfaces and Ray Tracing....Pages 33-53
Front Matter....Pages 55-55
A Theoretical Analysis of Global Illumination Models....Pages 57-71
Physically Based Lighting Calculations for Computer Graphics: A Modern Perspective....Pages 73-83
Efficient Radiosity Methods for Non-Separable Reflectance Models....Pages 85-97
Front Matter....Pages 99-99
A Progressive Ray-Tracing-based Radiosity with General Reflectance Functions....Pages 101-113
A Two-Pass Radiosity Method for B?zier Patches....Pages 115-124
Front Matter....Pages 125-125
The Hemisphere Radiosity Method: A Tale of Two Algorithms....Pages 127-135
Exploiting Coherence for Clipping and View Transformations in Radiosity Algorithms....Pages 137-149
A Rapid Hierarchical Radiosity Algorithm for Unoccluded Environments....Pages 151-169
Fast Radiosity by Parallelization....Pages 171-181
Front Matter....Pages 183-183
Newton’s Colors: Simulating Interference Phenomena in Realistic Image Synthesis....Pages 185-194
Light Sources in a Ray Tracing Environment....Pages 195-210
Methods for Efficient Sampling of Arbitrarily Distributed Volume Densities....Pages 211-230
Back Matter....Pages 231-232
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