Specularity
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Rendering specular microgeometry with wave optics Open
Simulation of light reflection from specular surfaces is a core problem of computer graphics. Existing solutions either make the approximation of providing only a large-area average solution in terms of a fixed BRDF (ignoring spatial detai…
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Boundary scattering of phonons: Specularity of a randomly rough surface in the small-perturbation limit Open
Scattering of normally incident longitudinal and transverse acoustic waves by a randomly rough surface of an elastically isotropic solid is analyzed within the small-perturbation approach. In the limiting case of a large correlation length…
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Deep Learning-Driven Detection and Mapping of Rockfalls on Mars Open
The analysis of rockfall distribution and magnitude is a useful tool to study the past and current endogenic and exogenic activity of Mars. At the same time, tracks left by rockfalls provide insights into the mechanical properties of the M…
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An evaluation of Fuchs-Sondheimer and Mayadas-Shatzkes models below 14nm node wide lines Open
The applicability of the Fuchs-Sondheimer and Mayadas-Shatzkes scattering models below the 14nm node with wide interconnect trenches of variable aspect ratio is investigated. The aspect ratio of these lines was varied between 1.2, 1.8, and…
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Low levels of specularity support operational color constancy, particularly when surface and illumination geometry can be inferred Open
We tested whether surface specularity alone supports operational color constancy-the ability to discriminate changes in illumination or reflectance. Observers viewed short animations of illuminant or reflectance changes in rendered scenes …
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FLARE: Fast Learning of Animatable and Relightable Mesh Avatars Open
Our goal is to efficiently learn personalized animatable 3D head avatars from videos that are geometrically accurate, realistic, relightable, and compatible with current rendering systems. While 3D meshes enable efficient processing and ar…
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CFD simulation of particle segregation in a rotating drum. Part II: Effects of specularity coefficient Open
Segregation of binary particle mixture in a rotating drum is numerically studied using the Eulerian multiphase computational fluid dynamics (CFD) simulations coupling the solid phase kinetic theory of granular flow model. The corresponding…
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Detecting Specular Reflections and Cast Shadows to Estimate Reflectance and Illumination of Dynamic Indoor Scenes Open
The goal of Mixed Reality (MR) is to achieve a seamless and realistic blending between real and virtual worlds. This requires the estimation of reflectance properties and lighting characteristics of the real scene. One of the main challeng…
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Study of Heat Dissipation Mechanism in Nanoscale MOSFETs Using BDE Model Open
In this chapter, we report the nano-heat transport in metal-oxide-semiconductor field effect transistor (MOSFET). We propose a ballistic-diffusive model (BDE) to inquire the thermal stability of nanoscale MOSFET’s. To study the mechanism o…
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Structure-specific mode-resolved phonon coherence and specularity at graphene grain boundaries Open
In spite of their importance for understanding phonon transport phenomena in thin films and polycrystalline solids, the effects of boundary roughness scattering on phonon specularity and coherence are poorly understood because there is no …
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Illumination estimation from specular highlight in a multi-spectral image Open
The reflection spectrum of an object characterizes its surface material, but for non-Lambertian scenes, the recorded spectrum often deviates owing to specular contamination. To compensate for this deviation, the illumination spectrum is re…
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Thermal Conductivity Calculations for Nanoparticles Embedded in a Base Fluid Open
The Prasher analytical model was used for calculating the thermal conductivity of the embedded nanoparticles of Al2O3, CuO, ZnO, and SiO2 in conventional fluids, such as water and ethylene glycol. The values that were obtained were used in…
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A generalized approach to characterize optical properties of natural objects Open
To understand the diversity of ways in which natural materials interact with light, it is important to consider how their reflectance changes with the angle of illumination or viewing and to consider wavelengths beyond the visible. Efforts…
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Coherent large beamwidth processing of radio-echo sounding data Open
Coherent processing of radio-echo sounding data of polar ice sheets is known to provide an indication of bedrock properties and detection of internal layers. We investigate the benefits of coherent processing of a large azimuth beamwidth t…
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Colorful Diffuse Intrinsic Image Decomposition in the Wild Open
Intrinsic image decomposition aims to separate the surface reflectance and the effects from the illumination given a single photograph. Due to the complexity of the problem, most prior works assume a single-color illumination and a Lambert…
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Effect of phonon-boundary scattering on phonon-drag factor in Seebeck coefficient of Si wire Open
For highly efficient thermoelectric devices with Si nanostructures, we have fabricated and characterized micro/nanometer-scaled Si wires preserving the phonon-drag effect in order to observe the impact of phonon-boundary scattering on the …
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CFD Study of the Gas-particle Flow in a Horizontal Duct: The Impact of the Solids Wall Boundary Conditions Open
The Johnson-Jackson boundary conditions are included in the twoPhaseEulerFoam solver of OpenFOAM-2.2.x in order to consider the wall-friction effect on the movement of particles. A straight conveying line using Johnson-Jackson boundary con…
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Simplified analysis of solar-weighted specular reflectance for mirrors with high specularity Open
The most relevant parameter to properly characterize solar mirrors is the solar-weighted near-specular reflectance. As this parameter cannot be directly measured with off-the-shelf instruments, a simplified procedure to be applied for high…
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Motion of glossy objects does not promote separation of lighting and surface colour Open
The surface properties of an object, such as texture, glossiness or colour, provide important cues to its identity. However, the actual visual stimulus received by the eye is determined by both the properties of the object and the illumina…
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Influence of Specularity Coefficient on the Hydrodynamics and Bubble Statistics of an Annular Fluidized Bed Reactor Open
This paper presents the results of a computational investigation on the effects of wall boundary conditions on the hydrodynamics of an annular fluidized bed (AFB). The objective is to develop better understanding of the hydrodynamics of an…
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Hybrid glaucoma detection model based on reflection components separation from retinal fundus images Open
The diagnosis of diseases associated to the retina is significantly aided by retinal fundus images. However, when flash illumination is used during image acquisition, specularity reflection can occur on images. The retinal image processing…
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Specular Detection on Glossy Surface Using Geometric Characteristics of Specularity in Top-View Images Open
In an autonomous driving assistance system (ADAS), top views effectively represent objects around the vehicle on a 2D plane. Top-view images are therefore widely used to detect lines in ADAS applications such as lane-keeping assistance and…
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Study of the Influence of Specularity on the Efficiency of Solar Reflectors Open
One of the critical aspects characterizing the behavior of the solar mirrors is their specularity [1], which characterizes its capability to focus all the reflected light into the solar collector. Specularity is highly dependent on the rou…
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Effects of Different Phonon Scattering Factors on the Heat Transport Properties of Graphene Ribbons Open
Understanding the effect of phonon scattering is of primary significance in the study of the thermal transport properties of graphene. While phonon scattering negatively affects the thermal conductivity, the exact effect of microscopic pho…
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Interactive Photo Editing on Smartphones via Intrinsic Decomposition Open
Intrinsic decomposition refers to the problem of estimating scene characteristics, such as albedo and shading, when one view or multiple views of a scene are provided. The inverse problem setting, where multiple unknowns are solved given a…
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Optical Test of the DS1 Prototype Concentrating Surface Open
This paper describes the optical test of the DS1 prototype concentrating surface carried out by CTAER. The DS1 is a parabolic Stirling dish developed under the framework of "SOLARDIS" project. The aim of this investigation was to character…
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The Effect of Material Properties on the Perceived Shape of Three-Dimensional Objects Open
Perceiving the shape of three-dimensional objects is essential for interacting with them in daily life. If objects are constructed from different materials, can the human visual system accurately estimate their three-dimensional shape? We …
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Voxel‐wise UV parameterization and view‐dependent texture synthesis for immersive rendering of truncated signed distance field scene model Open
In this paper, we introduced a novel voxel-wise UV parameterization and view-dependent texture synthesis for the immersive rendering of a truncated signed distance field (TSDF) scene model. The proposed UV parameterization delegates a prec…
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Numerical Analysis of Effects of Specularity Coefficient and Restitution Coefficient on the Hydrodynamics of Particles in a Rotating Drum Open
Various simulations have been conducted to understand the macroscopic behavior of particles in the solid-gas flow in rotating drums in the past. In these studies, the no-slip wall boundary condition and fixed restitution coefficient betwee…
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Effect of boundary roughness on the attenuation of specular phonon reflection in graphene Open
The reduced phonon specularity $p$ from boundary roughness scattering plays a major role in the lower thermal conductivity in semiconducting and insulating nanowires and films. Although the well-known Ziman formula $p=\exp(-4\sigma^{2}q_{x…