Results 71 to 80 of about 1,373 (228)

Region-Based Estimate of Endmember Variances for Hyperspectral Image Unmixing

, 2016
Endmember variability is receiving growing attention in the hyperspectral image (HSI) unmixing field. As an extension of linear mixing model (LMM), normal compositional model (NCM) assumes that the pixels of the HSI are linear combinations of random ...
Zhang, Bing, Gao, Lianru, Zhuang, Lina
core   +1 more source

Spectral unmixing approach in hyperspectral remote sensing: a tool for oil palm mapping

TecnoLógicas, 2019
Oil palm plantations typically span large areas; therefore, remote sensing has become a useful tool for advanced oil palm monitoring. This work reviews and evaluates two approaches to analyze oil palm plantations based on hyperspectral remote sensing ...
Hector Vargas, Ariolfo Camacho Velasco, Henry Arguello   +2 more
doaj   +1 more source

Stardust Mine: A 2024 gabbroic shergottite from Arizona, USA

Meteoritics &Planetary Science, EarlyView.
Abstract This study provides an initial characterization of Stardust Mine, a fresh gabbroic enriched shergottite collected in Arizona, USA, in September 2024 and is the first Martian meteorite to be unequivocably collected on US soil. Analysis was conducted on the type specimen and finds that Stardust Mine is composed of equal proportions of pyroxene ...
Jennifer T. Mitchell, Natasha R. Stephen, Zsuzsanna P. Allerton, Weiming Ding, Xin‐Yuan Zheng   +4 more
wiley   +1 more source

MODIS-Based Fractional Crop Mapping in the U.S. Midwest with Spatially Constrained Phenological Mixture Analysis

Remote Sensing, 2015
Since the 2000s, bioenergy land use has been rapidly expanded in U.S. agricultural lands. Monitoring this change with limited acquisition of remote sensing imagery is difficult because of the similar spectral properties of crops. While phenology-assisted
Cheng Zhong, Cuizhen Wang, Changshan Wu
doaj   +1 more source

Mineralogy, mineral chemistry, and redox equilibria in ten aggregate particles from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract Examination of 10 Bennu aggregate particles has revealed the presence of many phases which taken together can provide constraints on the oxygen fugacity (fO2) of Bennu samples. Phyllosilicates (saponite and serpentine), carbonates, oxides (magnetite, chromite), sulfides (pyrrhotite, pentlandite), phosphate (hydroxyapatite, Na‐Mg‐phosphate ...
K. Righter, J. Gorce, L. Le, K. Thomas‐Keprta, Z.E. Wilbur, L.P. Keller, Z. Gainsforth, T.J. McCoy, T.J. Zega, S.S. Russell, H.C. Connolly Jr., D.S. Lauretta   +11 more
wiley   +1 more source

Deep Generative Model for Spatial-spectral Unmixing with Multiple Endmember Priors

, 2022
Spectral unmixing is an effective tool to mine information at the subpixel level from complex hyperspectral images. To consider the spatially correlated materials distributions in the scene, many algorithms unmix the data in a spatial-spectral fashion ...
Altmann, Yoann; id_orcid, Zhang, Lijun, Shi, Shuaikai, Chen, Jie   +3 more
core   +1 more source

Unmixing urban hyperspectral imagery with a Gaussian mixture model on endmember variability

CoRR, 2018
In this paper, we model a pixel as a linear combination of endmembers sampled from probability distributions of Gaussian mixture models (GMM). The parameters of the GMM distributions are estimated using spectral libraries. Abundances are estimated based on the distribution parameters.
Yuan Zhou 0004, Erin B. Wetherley, Paul D. Gader   +2 more
openaire   +2 more sources

A review of the supercritical state of eruption‐fed volcanic density currents in subaerial and subaqueous settings

Sedimentology, EarlyView.
ABSTRACT Subaerial Pyroclastic Density Currents (PDCs) and Subaqueous Eruption‐Fed Density Currents (SEFDCs) produced during volcanic eruptions can present major hazards to surrounding communities and ecosystems. The bedforms deposited by these volcanic density currents can provide insights into the nature of transport and depositional processes, which
Shannon E. Frey, Martin Jutzeler, Rebecca J. Carey   +2 more
wiley   +1 more source

Optimal endmember-based super-resolution land cover mapping [PDF]

, 2019
Super-resolution mapping (SRM) aims to determine the spatial distribution of the land cover classes contained in the area represented by mixed pixels to obtain a more appropriate and accurate map at a finer spatial resolution than the input remotely ...
Du, Yun, Ling, Feng, Li, Xinyan, Li, Xiaodong, Yang, Xiaohong, Foody, Giles, Zhang, Yihang   +6 more
core   +1 more source

An Improved Spatial and Temporal Reflectance Unmixing Model to Synthesize Time Series of Landsat-Like Images

Remote Sensing, 2018
The trade-off between spatial and temporal resolution limits the acquisition of dense time series of Landsat images, and limits the ability to properly monitor land surface dynamics in time.
Jianhang Ma, Wenjuan Zhang, Andrea Marinoni, Lianru Gao, Bing Zhang   +4 more
doaj   +1 more source