Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"light transport"”.
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Accelerating Physically-Based Light Transport Algorithms
… the central computations of physically-based light transport algorithms. We present novel mappings of the crucial primitive operations of ray tracing and shading to data parallel architectures and introduce intelligent importance sampling strategies which adapt themselves to image content in …
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Computational light transport using space, time, and polarization
Understanding how light travels through macroscopic scenes can transform autonomous driving, medical imaging and consumer photography. Unfortunately, this understanding is difficult to achieve: trillions of light paths are measured by millions of pixels. The framework of computational light …
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Bioinspired scattering materials: light transport in anisotropic, disordered systems
The study of light propagation in disordered media has attracted the interest of many researchers for its relevance to fundamental and applied problems, ranging from imaging through turbid media to the fabrication of white paint. Scattering in a disordered system is determined by the spatial …
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Nanomanufacturing of functional nanostructured surfaces for efficient light transport
… structural coloring effects, and enhanced light extraction from high refractive index materials due to their potential to modulate optical behavior on their surfaces. This thesis focuses on design, analysis, and fabrication of functional nanostructured surfaces for efficient light …
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Multibounce light transport analysis using ultrafast imaging for material acquisition
… a novel framework for analysis of multibounce light transport using time-of-flight imaging for the applications of ultrafast reflectance acquisition and imaging through scattering media. Using ultrafast imaging and ultrafast illumination, we analyze light indirectly scattered off materials to …
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View-dependent precomputed light transport using non-linear Gaussian function approximations
… effects under distant all-frequency lighting. Existing precomputed light transport approaches can render rich global illumination effects, but high-frequency view-dependent effects such as sharp highlights remain a challenge. We introduce a new representation of the light transport …
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Nanostructured multifunctional materials for control of light transport and surface wettability
… in this thesis focuses on the joint control of light transport and surface wettability. It starts with analysis and design, followed by implementation of new multifunctional nanostructured materials using novel nanolithographic fabrication techniques. We first consider multifunctional silica …
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Shadows, Mirrors, and Snow: Decoding Multibounce Light Transport in Time-of-Flight Photography
Time-of-flight photography is a new imaging modality that combines the precise time-of-flight measurements of lidar with the wide field of view and high angular resolution of photography. The result of this combination is that time-of-flight cameras by nature capture videos of light as it flows …
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Breaking symmetries in ordered materials : spin polarized light transport in magnetized noncentrosymmetric 1D photonic crystals, and photonic gaps and fabrication of quasiperiodic structured materials from interference lithography
… air-crystal interface, ability to allow bending light with perpendicular magnetic fields, unidirectional superprism effects, etc. By calculating the complex photonic band structure, we show that the gap modes differ fundamentally from the commonly assumed evanescent modes with purely imaginary …
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The texture shading cache : an approach to asynchronous interactive illumination
… of algorithms simulating physically correct light transport in rendering has pushed the computational bottleneck in interactive visualisation applications towards pixel shading. Rendering is increasingly becoming bound by illumination processes and as a result, many interactive applications …
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Nonlinear dissipative dynamics of optomechanical and laser arrays
… arrays, leading to the suppression of light transport. Importantly, the generation of synthetic electric fields depends on the direction of light propagation, giving rise to unidirectional light transport. In a second step, we investigate the quantum dynamics of synthetic gauge fields …
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"""cat""-Ology: Spectrally Resolved Neurophotonics in the Mammalian Brain and Phantom Studies"
… field. Specifically, in this work, we probed the light-matter interactions in the NIR region to understand physiological processes in the mammalian brain. We sought to improve on existing principles and propose a new technique by which we can decipher these processes spectrally. This technique …
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Cat-ology spectrally resolved neurophotonics in the mammalian brain and phantom studies
… field. Specifically, in this work, we probed the light-matter interactions in the NIR region to understand physiological processes in the mammalian brain. We sought to improve on existing principles and propose a new technique by which we can decipher these processes spectrally. This technique …
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Real-time Realistic Rendering And High Dynamic Range Image Display And Compression
… rendering problem. Of primary consideration is light transport simulation, which is known to be computationally expensive. Monte Carlo methods represent a simple and general class of algorithms often used for light transport computation. Unfortunately, the images resulting from Monte Carlo …
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Optimized ray tracing for real time use without hardware accelerators
… or animation engines wish to simulate realistic light transport to present the user with streams of high fidelity images. For decades rasterization was the rendering technique of choice because it is fast and produces high quality images. However, in recent years graphics hardware has begun …
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Impact of Artificial UV Light Sources on the Skin
… properties of skin tissue that govern the transport of light through tissue and secondly to develop a model for light transport in tissue that makes it possible to investigate the number<br/>of photons absorbed beneath the skin. Different skin types of various pigmentation levels were …
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Femtosecond Transient Imaging
… illumination and time images. Using time-of-flight cameras and multi-path analysis of global light transport, we pioneer new algorithms and systems for scene understanding through time images. We demonstrate that our proposed transient imaging framework provides opportunities to accomplish …
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Path manipulation strategies for rendering dynamic environments.
… reconstructs the subpaths that compose the light transport paths and addresses the restriction of static geometry commonly associated with Monte Carlo light transport simulations. By reconstructing and reusing subpaths, the path manipulation algorithm obviates the regeneration of the entire …
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Loss compensation in a plasmonic nanoparticle array
… for loss compensation. Here the physics of light transport in a nanoparticle array, and the operation of gain media in contact with the structure, are described and analytically modeled. A two-dimensional array of closely spaced gold nanoparticles has been fabricated by focused ion beam …
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Sampling Methods in Ray-Based Global Illumination
… to create photographic images by simulating light transport are collectively known as Global Illumination methods. The most versatile of these are based on ray tracing (following ray paths through a scene), and numerical integration using random or quasi-random sampling. While ray tracing and …
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