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Showing 1 to 20 of 821 for “"Reflectance"”.
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Special Reflectance of Hydrophytes
… of wetlands on remotely sensed imagery. Spectral reflectance measurements of 10 species of hydrophytes were made with an Exotach radiometer during three phenological stages, flowering and early seed, senescence, and early emergent. Reflectance data were analyzed to determine significant (≥.95) …
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A data-driven reflectance model
… a data-driven model for isotropic bidirectional reflectance distribution functions (BRDFs) based on acquired reflectance data. Instead of using analytic reflectance models, each BRDF is represented as a dense set of measurements. This representation allows interpolation and extrapolation in the …
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Surface Roughness Effects on Bidirectional Reflectance
Made available in DSpace on 2014-12-10T22:48:19Z (GMT). No. of bitstreams: 1 7317428.pdf: 4305340 bytes, checksum: 8e833be46ed968f799b263c9cc9027fb (MD5) Previous issue date: 1972
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Surface reflectance characteristics of Langjökull, Iceland
ATM, ETM+ and MODIS radiance data collected for the surface of Langjokull during August 2007. Radiance data from the three different instruments was then converted to surface broadband albedo using a number of different methods. The differences between the methods used to derive the surface albedo …
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Shape, Reflectance, and Illumination From Appearance
… by recovering three-dimensional (3D) shape, reflectance, illumination, or everything jointly under different setups. The input in these different setups varies from single images to multi-view images lit by multiple known lighting conditions, then to multi-view images under one unknown …
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Shape Estimation under General Reflectance and Transparency
… develop a reconstruction system for scenes with reflectance properties ranging from diffuse to specular. We capture images of the scene as it is illuminated by a planar, spatially non-uniform light source. Then we show that if the source is translated to a parallel position away from the scene, a …
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Fractal analysis of topography and reflectance surfaces
The definition of a fractal has been successfully deduced from constructing the Koch curve and the Cantor set. Principles of seven methods (the ruler, box-counting, spectral structure function, intersection methods, cube-counting, and triangular prism methods) for determining the fractal dimensions …
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Near-infrared reflectance soil organic matter sensor
In-field sensing of soil organic matter content would be desirable to provide a control input for the variation of soil-applied herbicide application rates. Control based on organic matter content could eliminate overapplication on less productive areas within a field, thereby improving …
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Diffuse reflectance spectroscopy of human colon tissue
Diffuse reflectance spectroscopy can provide quantitative biochemical and morphological information for the analysis of biological tissue epithelium and the detection of precancerous lesions. To investigate this, diffuse reflectance spectra were collected from adenomatous colon polyps (cancer …
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Surface Prior Information Reflectance Estimation (SPIRE) algorithms
… the problem of estimating changes in surface reflectance in hyperspectral image cubes, under unknown multiplicative and additive illumination noise. Rather than using the Empirical Line Method (ELM) or physics-based approaches, we assumed the presence of a prior reflectance image cube and …
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Spectral reflectance curves of the planet Mercury.
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Forging asteroid-meteorite relationships through reflectance spectroscopy
… samples due to their significantly higher reflectance values with increasing wavelength. The only laboratory-simulated "weathering" process that reddens the spectra but does not significantly suppress the bands is alteration by laser irradiation, which is hoped to duplicate the effects of …
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Determining shape and reflectance using multiple images
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Spatially-resolved reflectance spectroscopy with variable fiber geometry
… in tissue. Many optical modalities, including reflectance spectroscopy, use fiber optics as the means of light delivery and detection. However, the influence of fiber geometry on sampled optical spectra is not well understood. Since various configurations of fiber-optic probes may produce …
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Physically based geometry and reflectance recovery from images
… resolve ambiguities in the recovery of shape and reflectance in the inverse rendering problem. Our results show that the complementary nature of RGB and depth is highly beneficial for a practical relighting system. Lastly, in the third problem, we exploit the use of geometric constraints relating …
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Characterizing middle ear reflectance via pole-zero fitting
… thesis characterizes middle ear complex acoustic reflectance (CAR) and impedance by fitting poles and zeros to real-ear measurements. The goal of this work is to establish a quantitative connection between pole-zero locations and the underlying physical properties of CAR data. Most previous …
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Reflectance spectra of the Galilean satellites of Jupiter
Thesis: B.S., Massachusetts Institute of Technology, Department of Physics, 1994
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Recovering shading and reflectance from a single image
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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