نتایج جستجو برای: reflectance

تعداد نتایج: 19705  

2016
Shuai Li Ralph E. Milliken

Radiance measured by the Moon Mineralogy Mapper (M) at wavelengths beyond ~2μm commonly includes both solar reflected and thermally emitted contributions from the lunar surface. Insufficient correction (removal) of the thermal contribution can modify and even mask absorptions at these wavelengths in derived surface reflectance spectra, an effect that precludes accurate identification and analys...

2011
George Zonios Aikaterini Dimou

Diffuse reflectance spectroscopy is one of the simplest and widely used techniques for the non-invasive study of biological tissues but no exact analytical solution exists for the problem of diffuse reflectance from turbid media such as biological tissues. In this work, a general treatment of the problem of diffuse reflectance from a homogeneous semi-infinite turbid medium is presented using Mo...

2004
William Grey Peter North

Atmospheric aerosol properties and land surface reflectance can be retrieved from dual-angle AATSR measurements. In this paper a map of aerosol optical depth at 550 nm covering the Sahel and Southern Sahara region is presented. The map is a composite of thirtytwo 500 km wide AATSR strip-lines acquired throughout March 2003. Verification is performed using the MODIS and MISR global aerosol produ...

1997
A. W. McConnell T. Timusk A. Dabkowski H. A. Dabkowska

The reflectance of single crystal LaSrGaO 4 has been measured from ≈ 50 to 40000 cm −1 along the a andc axis. The optical properties have been calculated from a Kramers-Kronig analysis of the reflectance for both polarization. The reflectance curves have been fit using a product of Lorentzian oscillators.

Journal: :Visual neuroscience 2004
Rigmor C Baraas David H Foster Kinjiro Amano Sérgio M C Nascimento

The ability of color-deficient observers to discriminate between illuminant changes and surface-reflectance changes in a scene was tested with natural and Munsell reflectance spectra. To avoid the confounding effects of spatial structure, stimuli were simulations of Mondrian-like colored patterns, presented on a computer-controlled color monitor. Protanopes performed less well than normal trich...

2003
J. Ronald V. Zaneveld Emmanuel Boss

The reflectance of the bottom is of importance when interpreting optical data in shallow water. Closure studies of radiative transfer, interpretation of laser line scanner data, lidar, and remote sensing in shallow waters require understanding of the bottom reflectance. In the Coastal Benthic Optical Properties experiment (CoBOP), extensive measurements of the material reflectance (reflectance ...

Journal: :Plant physiology 1976
B G Drake

Reflectance of red (656-705 nm) and infrared (776-826 nm) solar radiation and standing crop biomass were measured in three salt marsh communities at intervals of approximately 2 weeks between February and August 1974. Red reflectance declined at the onset of greening in each community and was correlated with standing crop of green biomass. Infrared reflectance increased substantially in the shr...

2010
Victor R. Weidner Patricia Y. Barnes Kenneth L. Eckerle

This work describes the techniques used to prepare and analyze a reflectance wavelength standard composed of three rare-earth oxides. A mixture of dysprosium oxide (DY20.1), erbium oxide (Er203). and holmium oxide (Ho20) provides a pressed powder specimen exhibiting a near infrared reflectance spectrum characterized by many discrete absorption minima in the wavelength range 700 to 2000 urn. The...

1997
Yoichi Sato Imari Sato Katsushi Ikeuchi

Image morphing techniques can create a smooth transition between two images. However, one of the main weaknesses of the image morphing technique is that intermediate images in the transition often have physically incorrect shading such as highlights and shadows. Moreover, we cannot alter viewing and lighting conditions when creating the intermediate images. That is because those images are obta...

Journal: :Remote Sensing 2016
Xi Shao Changyong Cao Tung-Chang Liu

The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard Suomi National Polar Orbiting Partnership (SNPP) uses a solar diffuser (SD) as its radiometric calibrator for the reflective solar band calibration. The SD is made of SpectralonTM (one type of fluoropolymer) and was chosen because of its controlled reflectance in the Visible/Near-Infrared/Shortwave-Infrared region and its near-Lamber...

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