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.
Results
Showing 1 to 20 of 29 for “"specular reflection"”.
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Subjective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard
… (VDTs) - Part 7: Requirements for display with reflections. The thesis involved two phases of effort that evaluated the photometric measurements required in the ISO standard in terms of subjective image quality judgments. In phase one, seven monitors were evaluated photometrically according to …
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Objective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard
… and accuracy. The ANOVA results indicate that specular glare interferes significantly more with reading time than does diffuse glare. Diffuse (200 lux) and Specular reading times also were correlated against two ISO metrics: screen image luminance ratio (Diffuse, 200 lux) and specular …
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Real-time highlight removal from a single image
… in computer vision concerning the estimation of specular reflection components and the removal thereof. In recent applications, highlight removal methods have been employed for the reproduction of specular highlights on high dynamic range (HDR) displays; to increase glossiness of images in …
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A Model of Energy and Angular Distributions of Fluxes to the Substrate and Resulting Surface Topology for Plasma Etching Systems
… has been used to examine the mechanisms, such as specular reflection and energy and angular dependence of etch yield, involved in the shaping of the etch feature. Parameterization of these mechanisms and comparison to experiment have allowed ""cradle-to-grave"" (reactor parameters to feature …
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Kalos eidos for piano and wind ensemble
… appear throughout the piece: (1) the concept of specular reflection in symmetry, (2) the abstract and colorful images in geometric form. These are highlighted by various compositional techniques. The first chapter provides the origin of the piece, as well as my reason for the choice of genre and …
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Tensorial Impedance Surfaces for Manipulating Microwaves
… illumination are initially discussed, with the reflection coefficients for a generic tensorial impedance boundary derived. This work includes the derivation of an equation that calculates the range of impedance spatial distributions that satisfy a desired reflection problem. The degree of …
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Deep Learning of Semantic Image Labels on HDR Imagery in a Maritime Environment
… is the effect of direct-sunlight exposure and specular reflection causing degradation of camera reliability. It is for this reason then, in this work, the use of High-Dynamic Range imagery for deep learning of semantic image labels is studied in a littoral environment. This study theorizes that …
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Simulationsrechnungen zur FTIR-reflexionsspektroskopischen Charakterisierung von Schicht- und Fasersystemen
The Fourier-Transform-Infrared (FTIR) specular reflection spectroscopy has been applied to non-destructive characterization of layered systems, ceramic fibres and fibre composites. The required finding out of the optical functions of the sample materials as well as of the parameters of the sample …
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Estimating True Object Color from a Single Image and Multiple Images
… for simultaneously estimating the diffuse and specular reflections from a collection of images based on the dichromatic reflection model. By minimizing a cost function, the observed color in a scene can be decomposed into diffuse reflection (modeling the object color), specular reflection …
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Two-dimensional reflectivity polarization elastometry imaging techniques (PIET) of soft tissue
A non-invasive polarized light reflection measurement method to measure the stretch of soft tissue, such as skin, is described. The technique utilizes changes in the reflectivity of polarized light intensity as a monitor of skin stretch. Measurements on in-vitro pigskin and invivo human skin show …
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Surface reconstruction of a blast plate using stereo vision
… surfaces. This causes a problem due to specular reflection. This thesis further studies the reflective properties of the metal plate surface. Different methods of scanning the plate using the stereo-rig are investigated. The reconstructions obtained from these methods are analyzed for …
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Novel trapping techniques for shaping Bose-Einstein condensates
… from a height of 350 pm in an attempt to achieve specular reflection. but a large amount of dispersion was observed.
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Fabrication of extremely smooth blazed diffraction gratings
… ability to enhance diffraction intensity at the specular reflection angle off the blazed facets. In this thesis I will report a novel process for fabricating extremely smooth blazed diffraction gratings with 200 nm-period. The blazed grating is fabricated using interference lithography and …
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Expanding ultrafast photoacoustics for investigation of mechanical properties and thermal transport
… of up to a 1.4 THz frequency acoustic phonons, specular reflection from an air/GaN free surface was observed. The photo-excitation of THz acoustic phonons in layered structures was introduced as an effective noninvasive tool to investigate the integrity of the fabrication process. This study …
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Theory and Experiments of Scattering From Microscale Random Rough and Deterministic Surfaces
… angles and surface geometric parameters on the reflection distribution. A geometric optics approximation to the rigorous electromagnetic theory is developed for random rough surfaces. The approximate results agree well with the FTIR experimental findings, indicating that the geometric optics …
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Investigation into the feasibility of an electro-optic rail surface monitor
… of rail lead to the optics being configured for specular reflection. The angles of incidence and reflection are optimally set at 35°. In addition, the use of an infra-red source is found to be an added advantage.
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High speed 802.11ad wireless video streaming
… millimetre wave propagation through the use of specular reflection in non-line-of-sight environment, providing at least 94 % bandwidth utilization. Additional investigations result of the IEEE 802.11ad device in real live streaming of 4k ultra-high definition (UHD) video shows the feasibility of …
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SOLAR MIRRORS CHARACTERIZATION FOR CONCENTRATING SOLAR POWER TECHNOLOGY
… Accessory); - A VASRA (Variable Angle Specular Reflection Accessory); - A UV chamber to accelerate the ageing process; - A £gScan SMS Scatterometer for RMS Roughness and BDSF measurement; - An outdoor bench The work was completed with two modeling tools: - An engineering equation solver …
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Bridging the Modeling-Sampling Gap for Mid-Infrared Reflectance Spectroscopy of Small Particles, Films, and Fibers
… characteristics were studied using FT-IR reflection microspectroscopy; results show that absorption has a non-linear, stair-step-like dependence on particle coverage and a wavelength dependence that can be explained by electric field standing waves (EFSW) caused by the mirrored …
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Quantification and Reconstruction in Photoacoustic Tomography
… signals, via a mechanism similar to that of specular reflection. When imaging smooth boundary absorbing targets, the speckle visibility in PAT, which is defined as the ratio of the square root of the average power of speckles to that of boundaries, is inversely proportional to the square root …
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