Results 81 to 90 of about 1,362 (207)

A novel approach for endmember bundle extraction using spectral space splitting [PDF]

, 2015
The traditional endmember extraction methods search for a fixed set of endmembers, each one assigned to a single material. However, in many real applications, the materials of interest may present spectral variability which is related to subtle ...
Müller, Rupert, Rivard, Benoit, Derek Rogge, Rupert Muller, Rogge, Derek, Benoit Rivard, Andreou, Charoula, Charoula Andreou   +7 more
core   +1 more source

A Transformer-Based Framework for Spatiotemporal Unmixing of Land–Water Mixtures in Multispectral Satellite Data [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Spectral unmixing is essential for analyzing mixed pixels in remote sensing, though it has traditionally focused on hyperspectral data. Multispectral Sentinel-2 imagery, despite its wide availability and relevance for environmental monitoring, has seen ...
A. B. Nguyen, A. Schenk, S. Hinz
doaj   +1 more source

Characterization of coesite‐bearing impact melt glass from the Hapcheon crater, Korea: Trimodal phase architecture, shock metamorphism, and implications for 40Ar/39Ar geochronology

Meteoritics &Planetary Science, EarlyView.
Abstract We present the first micrometer‐scale, phase‐resolved compositional characterization of impact melt glass from the Hapcheon crater (~1.4 km apparent diameter), the first confirmed impact structure on the Korean Peninsula, integrating EPMA‐WDS (5 μm spot), confocal Raman spectroscopy (<1 μm spot), XRD, and 40Ar/39Ar step‐heating geochronology ...
Jin‐Young Lee, Jeongmin Kim, Sei‐Sun Hong   +2 more
wiley   +1 more source

Normal Endmember Spectral Unmixing Method for Hyperspectral Imagery [PDF]

, 2015
The normal compositional model (NCM) has been introduced to characterize mixed pixels in hyperspectral images, particularly when endmember variability needs to be considered in the unmixing process.
Li, Jun, Zhang, Bing, Gao, Lianru, Plaza, Antonio, Zhuang, Lina   +4 more
core   +1 more source

Improving Discrimination of Savanna Tree Species Through a Multiple-Endmember Spectral Angle Mapper Approach: Canopy-Level Analysis [PDF]

, 2010
Differences in within-species phenology and structure are controlled by genetic variation, as well as topography, edaphic properties, and climatic variables across the landscape, and present important challenges to species differentiation with remote ...
Mathieu, R., Naidoo, L., Aardt, J., van, Cho, M.A., Debba, P., Asner, G.P.   +5 more
core   +3 more sources

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

CO2 and N2O Emissions From Vehicles in Seoul Megacity, South Korea: Insights From Mixing Ratio and Stable Isotope Ratios

Rapid Communications in Mass Spectrometry, Volume 40, Issue 18, 30 September 2026.
ABSTRACT Rationale Vehicular traffic is a major source of anthropogenic greenhouse gases in megacities; however, real‐world constraints on vehicle‐derived N2O emissions and their isotopic characteristics remain limited. Methods Air samples were collected from three tunnels and urban background sites (a university campus and mountain) in Seoul, South ...
Jeongeun Kim, Jinho Ahn, Sambit Ghosh, Sakae Toyoda, Shinji Morimoto, Hyunsuk Choi, Jaehoen Jung, Hungyu Lee   +7 more
wiley   +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

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

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