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 132 for “"radiance"”.
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Stratospheric radiance
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1963
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Editing Conditional Radiance Fields
A neural radiance field (NeRF) is a scene model supporting high-quality view synthesis, optimized per scene. In this thesis, we explore enabling user editing of a category-level NeRF – also known as a conditional radiance field – trained on a shape category. Specifically, we introduce a method for …
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Textured Hierarchical Precomputed Radiance Transfer
… and inter-reflections. In contrast, Precomputed Radiance Transfer (PRT) is a real-time computer graphics technique which pre-calculates an object's response to potential incident light. At run time, the actual incident light can be used to quickly illuminate the surface, rendering effects such as …
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Not all views are equal: active neural radiance fields
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Radiance interpolants for interactive scene editing and ray tracing
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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3D damage mapping and segmentation using neural radiance fields and advanced deep learning techniques
… adopts the Nerfacto model from the Neural Radiance Fields (NeRF) within the Nerfstudio framework to enhance 3D reconstruction fidelity and utilizes strategically placed markers to improve camera pose accuracy. Additionally, the integration of the STRNet and Test Time Agumentation (TTA) …
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Diver: real-time and accurate neural radiance fields with deterministic integration for volume rendering
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Atmospheric temperature profile estimation from infrared and microwave spectral radiance observations using principal components analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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The radiance of the gluon spin : constraining the proton spin structure with the direct photon double helicity asymmetry
Although fundamental to the observable universe, the proton is not elementary. Rather the particle is a bound state of three valence quarks and the QCD vacuum that condenses around them, its properties an amalgamation of those underlying degrees of freedom. Naive expectations presume that …
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Development and Application of a Versatile Balloon-Borne DOAS Spectrometer for Skylight Radiance and Atmospheric Trace Gas Profile Measurements
… limb, nadir, and direct sunlight). Skylight radiances in the UV/visible range between 330 and 550 nm are measured, and the recorded spectra are analyzed for column densities of ozone, NO2, BrO, H2O, and O4 along the line of sight by applying the Differential Optical Absorption Spectroscopy …
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A new technique to find both real and imaginary index of refraction of atmospheric aerosols from clear sky radiance measurements.
… has been developed which utilizes polarized sky radiance measurements in the solar principal plane. The technique requires that the aerosol size distribution, Rayleigh optical depth, aerosol optical depth, surface albedo, and preferably the surface anisotropic characteristics be known from …
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A Radiative Analysis of Angular Signatures and Oblique Radiance Retrievals Over the Polar Regions From the Multi-Angle Imaging Spectroradiometer
This dissertation makes the following key contributions to science: (1) With the aid of the MODerate Resolution atmospheric TRANsmission (MODTRAN) radiative transfer model, this dissertation provides the first explanation of the conditions that lead to the brighter or darker appearance of clouds …
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Development of a Water Cloud Radiance Model for Use in Training an Artificial Neural Network to Recover Cloud Properties from Sun Photometer Observations
… of input and output parameter sets. A cloud radiance model is derived that takes into consideration the cloud depth, the mean size of the cloud water particles, and the cloud liquid water content. The cloud radiance model derived here is capable of considering the wavelength of the incident …
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Aerosol optical depth retrievals from high-resolution commercial satellite imagery over areas of high surface reflectance
… as urban areas and deserts, since the upwelling radiance due to scattering by aerosols is small compared to the radiance resulting from surface reflection. The method proposed here uses shadows cast on the surface to exploit the differences between radiance from the adjacent shaded and unshaded …
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Retrieval of cloud-cleared atmospheric temperature profiles from hyperspectral infrared and microwave observations
… infrared and microwave observations of spectral radiance in cloudy conditions. The contributions of the thesis are twofold: improvements in 1) microwave instrumentation and 2) hyperspectral signal processing and estimation algorithms. The NPOESS Aircraft Sounder Testbed-Microwave (NAST-M) passive …
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Inverse Illumination Design with Genetic Programming
… towards problems in illumination design. The Radiance system is used for performing accurate illumination simulations. Radiance accounts for a number of important environmental factors, which we exploit during fitness evaluation. Illumination requirements include local illumination intensity …
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Computer colour matching with fluorescent dyes : The influence of fluorescence on reflectance - concentration relationships for fluorescent dyes, singly and in mixtures, and the effects on the prediction of recipes for use in colour matching.
… Two sets of equations to relate the total radiance factors of dyeings with a fluorescent dye and its concentration were developed respectively for self and compound shades where a non-fluorescent dye is admixed. Finding constants responsible for the compound shades required a number of …
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