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Shape, Reflectance, and Illumination from Appearance

2021
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Release : 2021
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Kind : eBook
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Book Synopsis Shape, Reflectance, and Illumination from Appearance by : Xiuming Zhang (Scientist in electrical engineering and computer science)

Download or read book Shape, Reflectance, and Illumination from Appearance written by Xiuming Zhang (Scientist in electrical engineering and computer science). This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt: The image formation process describes how light interacts with the objects in a scene and eventually reaches the camera, forming an image that we observe. Inverting this process is a long-standing, ill-posed problem in computer vision, which involves estimating shape, material properties, and/or illumination passively from the object's appearance. Such "inverse rendering" capabilities enable 3D understanding of our world (as desired in autonomous driving, robotics, etc.) and computer graphics applications such as relighting, view synthesis, and object capture (as desired in extended reality [XR], etc.)

Principles of Appearance Acquisition and Representation

2009-08-20 Image processing
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Release : 2009-08-20
Genre : Image processing
Kind : eBook
Book Rating : 542/5 ( reviews)

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Book Synopsis Principles of Appearance Acquisition and Representation by : Tim Weyrich

Download or read book Principles of Appearance Acquisition and Representation written by Tim Weyrich. This book was released on 2009-08-20. Available in PDF, EPUB and Kindle. Book excerpt: "Algorithms for scene understanding and realistic image synthesis require accurate models of the way real-world materials scatter light. This study describes recent work in the graphics community to measure the spatially- and directionally-varying reflectance and subsurface scattering of complex materials, and to develop efficient representations and analysis tools for these datasets. We describe the design of acquisition devices and capture strategies for reflectance functions such as BRDFs and BSSRDFs, efficient factored representations, and a case study of capturing the appearance of human faces"--Abstract.

Visual Estimation of Shape, Reflectance and Illumination

2006
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Release : 2006
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Book Synopsis Visual Estimation of Shape, Reflectance and Illumination by : George Vogiatzis

Download or read book Visual Estimation of Shape, Reflectance and Illumination written by George Vogiatzis. This book was released on 2006. Available in PDF, EPUB and Kindle. Book excerpt:

Estimation of Shape, Lighting, and Reflectivity from Stereo and Shading Information

1994 Computer vision
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Release : 1994
Genre : Computer vision
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Book Synopsis Estimation of Shape, Lighting, and Reflectivity from Stereo and Shading Information by : Darrell R. Hougen

Download or read book Estimation of Shape, Lighting, and Reflectivity from Stereo and Shading Information written by Darrell R. Hougen. This book was released on 1994. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This thesis is concerned with the combined use of stereo and shading information for the purpose of three-dimensional surface shape estimation. The applicability, resolution, and accuracy of each individual method is examined and compared with that attainable in a combined approach. Integration is examined from standard and stochastic perspectives. The standard approach involves use of stereo information as an initial estimate of the surface shape from which parameters of the shading method such as the light source direction can be estimated. Issues of lighting and reflectivity estimation are addressed and solutions are advanced. In particular, general methods for estimation of the light source distribution and reflectance map are proposed and tested. Colored lighting and color variant reflectance functions are examined as possible sources of additional shape information. A statistical approach to surface shape estimation called 'shape from appearance' is also advanced. In this approach, stereo information is used indirectly as a source of statistical information. It is shown that through a scale change the resulting statistical model can be used to achieve higher resolution than is achievable through the direct use of stereo information."

Digital Modeling of Material Appearance

2010-07-21 Computers
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Release : 2010-07-21
Genre : Computers
Kind : eBook
Book Rating : 71X/5 ( reviews)

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Book Synopsis Digital Modeling of Material Appearance by : Julie Dorsey

Download or read book Digital Modeling of Material Appearance written by Julie Dorsey. This book was released on 2010-07-21. Available in PDF, EPUB and Kindle. Book excerpt: Computer graphics systems are capable of generating stunningly realistic images of objects that have never physically existed. In order for computers to create these accurately detailed images, digital models of appearance must include robust data to give viewers a credible visual impression of the depicted materials. In particular, digital models demonstrating the nuances of how materials interact with light are essential to this capability. Digital Modeling of Material Appearance is the first comprehensive work on the digital modeling of material appearance: it explains how models from physics and engineering are combined with keen observation skills for use in computer graphics rendering. Written by the foremost experts in appearance modeling and rendering, this book is for practitioners who want a general framework for understanding material modeling tools, and also for researchers pursuing the development of new modeling techniques. The text is not a "how to" guide for a particular software system. Instead, it provides a thorough discussion of foundations and detailed coverage of key advances. Practitioners and researchers in applications such as architecture, theater, product development, cultural heritage documentation, visual simulation and training, as well as traditional digital application areas such as feature film, television, and computer games, will benefit from this much needed resource. ABOUT THE AUTHORS Julie Dorsey and Holly Rushmeier are professors in the Computer Science Department at Yale University and co-directors of the Yale Computer Graphics Group. François Sillion is a senior researcher with INRIA (Institut National de Recherche en Informatique et Automatique), and director of its Grenoble Rhône-Alpes research center. - First comprehensive treatment of the digital modeling of material appearance - Provides a foundation for modeling appearance, based on the physics of how light interacts with materials, how people perceive appearance, and the implications of rendering appearance on a digital computer - An invaluable, one-stop resource for practitioners and researchers in a variety of fields dealing with the digital modeling of material appearance

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