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Author: Timothy Ly Martin
Publisher:
ISBN: 9781267617798
Category :
Languages : en
Pages : 76
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Book Description
Light propagation volumes is a real-time single bounce indirect lighting approximation that uses spherical harmonics for light representation and a grid-based light transport. The technique is useful for applying indirect light to participating media, glossy specular reflection, and indirect diffuse illumination, but this thesis focuses on the indirect diffuse illumination. When applying indirect diffuse light, the light propagation volume method has issues with light bleeding, self lighting, and surface lighting artifacts. Also, when the indirect diffuse lighting is applied to more complex geometry, there is a lack of directional influence in the shading, producing a flat lighting effect, uncharacteristic of diffuse shading. I modify the light propagation volume approach by extending the spherical harmonics from two bands to three bands and describe a higher order propagation approach that considers 26 directions of propagation versus the original six. The new resulting technique is called higher order light propagation volumes. Higher order light propagation volumes are able to combat some of the problems present with light propagation volumes. The new technique reduces the appearance of lighting artifacts, and at the same time promotes a light distribution in scenes that resembles reference implementations, such as path tracing. Lastly, indirect diffuse illumination applied with the new technique produces higher quality diffuse shading detail because the directional representation of light is better preserved with the combination of extended spherical harmonics light representation and the higher order propagation method.
Author: Timothy Ly Martin
Publisher:
ISBN: 9781267617798
Category :
Languages : en
Pages : 76
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Book Description
Light propagation volumes is a real-time single bounce indirect lighting approximation that uses spherical harmonics for light representation and a grid-based light transport. The technique is useful for applying indirect light to participating media, glossy specular reflection, and indirect diffuse illumination, but this thesis focuses on the indirect diffuse illumination. When applying indirect diffuse light, the light propagation volume method has issues with light bleeding, self lighting, and surface lighting artifacts. Also, when the indirect diffuse lighting is applied to more complex geometry, there is a lack of directional influence in the shading, producing a flat lighting effect, uncharacteristic of diffuse shading. I modify the light propagation volume approach by extending the spherical harmonics from two bands to three bands and describe a higher order propagation approach that considers 26 directions of propagation versus the original six. The new resulting technique is called higher order light propagation volumes. Higher order light propagation volumes are able to combat some of the problems present with light propagation volumes. The new technique reduces the appearance of lighting artifacts, and at the same time promotes a light distribution in scenes that resembles reference implementations, such as path tracing. Lastly, indirect diffuse illumination applied with the new technique produces higher quality diffuse shading detail because the directional representation of light is better preserved with the combination of extended spherical harmonics light representation and the higher order propagation method.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
Author: OpenStax
Publisher:
ISBN: 9781680920451
Category : Science
Languages : en
Pages : 622
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Book Description
University Physics is a three-volume collection that meets the scope and sequence requirements for two- and three-semester calculus-based physics courses. Volume 1 covers mechanics, sound, oscillations, and waves. Volume 2 covers thermodynamics, electricity and magnetism, and Volume 3 covers optics and modern physics. This textbook emphasizes connections between between theory and application, making physics concepts interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. Frequent, strong examples focus on how to approach a problem, how to work with the equations, and how to check and generalize the result. The text and images in this textbook are grayscale.
Author: T. Stewart McKechnie
Publisher: Springer Nature
ISBN: 3030988287
Category : Science
Languages : en
Pages : 694
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Book Description
This 2nd edition lays out an updated version of the general theory of light propagation and imaging through Earth’s turbulent atmosphere initially developed in the late ‘70s and ‘80s, with additional applications in the areas of laser communications and high-energy laser beam propagation. New material includes a chapter providing a comprehensive mathematical tool set for precisely characterizing image formation with the anticipated Extremely Large Telescopes (ELTS), enabling a staggering range of star image shapes and sizes; existing chapters rewritten or modified so as to supplement the mathematics with clearer physical insight through written and graphical means; a history of the development of present-day understanding of light propagation and imaging through the atmosphere as represented by the general theory described. Beginning with the rudimentary, geometrical-optics based understanding of a century ago, it describes advances made in the 1960s, including the development of the ‘Kolmogorov theory,’ the deficiencies of which undermined its credibility, but not before it had done enormous damage, such as construction of a generation of underperforming ‘light bucket’ telescopes. The general theory requires no a priori turbulence assumptions. Instead, it provides means for calculating the turbulence properties directly from readily-measurable properties of star images.
Author: Michel Neviere
Publisher: CRC Press
ISBN: 1351830619
Category : Science
Languages : en
Pages : 261
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Book Description
Based on more than 30 years of research on differential theories of gratings, this book describes developments in differential theory for applications in spectroscopy, acoustics, X-ray instrumentation, optical communication, information processing, photolithography, high-power lasers, high-precision engineering, and astronomy. Introducing the Fast Fourier Factorization approach to improve the convergence of a truncated series, the book examines multilayers, stacked gratings, crossed gratings, photonic crystals, and isotropic and anisotropic materials; techniques and examples in grating design; and Maxwell equations in a truncated Fourier space.
Author: Glen D. Gillen
Publisher: CRC Press
ISBN: 1351831356
Category : Science
Languages : en
Pages : 391
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Book Description
Light Propagation in Linear Optical Media describes light propagation in linear media by expanding on diffraction theories beyond what is available in classic optics books. In one volume, this book combines the treatment of light propagation through various media, interfaces, and apertures using scalar and vector diffraction theories. After covering the fundamentals of light and physical optics, the authors discuss light traveling within an anisotropic crystal and present mathematical models for light propagation across planar boundaries between different media. They describe the propagation of Gaussian beams and discuss various diffraction models for the propagation of light. They also explore methods for spatially confining (trapping) cold atoms within localized light-intensity patterns. This book can be used as a technical reference by professional scientists and engineers interested in light propagation and as a supplemental text for upper-level undergraduate or graduate courses in optics.
Author: Wolfgang Engel
Publisher: CRC Press
ISBN: 1482264625
Category : Computers
Languages : en
Pages : 574
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Book Description
The latest edition of this bestselling game development reference offers proven tips and techniques for the real-time rendering of special effects and visualization data that are useful for beginners and seasoned game and graphics programmers alike.Exploring recent developments in the rapidly evolving field of real-time rendering, GPU Pro6: Advance
Author: Wolfgang Engel
Publisher: CRC Press
ISBN: 1351201220
Category : Computers
Languages : en
Pages : 490
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Book Description
Wolfgang Engel’s GPU Pro 360 Guide to Lighting gathers all the cutting-edge information from his previous seven GPU Pro volumes into a convenient single source anthology on lighting. This volume is complete with 24 articles by leading programmers that describes rendering techniques of global illumination effects suited for direct rendering applications in real time. GPU Pro 360 Guide to Lighting is comprised of ready-to-use ideas and efficient procedures that can help solve many computer graphics programming challenges that may arise. Key Features: Presents tips and tricks on real-time rendering of special effects and visualization data on common consumer software platforms such as PCs, video consoles, and mobile devices Covers specific challenges involved in creating games on various platforms Explores the latest developments in the rapidly evolving field of real-time rendering Takes a practical approach that helps graphics programmers solve their daily challenges
Author: Jorge Ripoll Lorenzo
Publisher: World Scientific
ISBN: 9814293768
Category : Medical
Languages : en
Pages : 355
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Book Description
Principles of Diffuse Light Propagation: Light Propagation in Tissues with Applications in Biology and Medicine.
Author: Marc Jöris
Publisher:
ISBN:
Category :
Languages : de
Pages : 80
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Book Description
