Results 41 to 50 of about 830 (208)

Endmember extraction algorithms from hyperspectral images

Annals of Geophysics, 2006
During the last years, several high-resolution sensors have been developed for hyperspectral remote sensing applications. Some of these sensors are already available on space-borne devices.
M. C. Cantero, P. L. Aguilar, A. Plaza, R. M. Pérez, P. J. Martínez, J. Plaza   +5 more
doaj   +1 more source

A New Deep Convolutional Network for Effective Hyperspectral Unmixing

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Hyperspectral unmixing extracts pure spectral constituents (endmembers) and their corresponding abundance fractions from remotely sensed scenes. Most traditional hyperspectral unmixing methods require the results of other endmember extraction algorithms ...
Xuanwen Tao, Mercedes E. Paoletti, Lirong Han, Zhaoyue Wu, Peng Ren, Javier Plaza, Antonio Plaza, Juan M. Haut   +7 more
doaj   +1 more source

Ostracod faunal and geochemical evidence for the impact of Hoxnian (MIS 11c) sea levels in eastern England

Journal of Quaternary Science, EarlyView.
ABSTRACT Marine isotope substage 11c (~426–366 ka) is widely regarded as the most recent Pleistocene interglacial that is broadly analogous to the Holocene. The timing and magnitude of sea‐level changes during MIS 11 have been much debated, particularly concerning whether sea levels were significantly higher than during the Holocene. Empirical evidence
Tom S. White, Jonathan A. Holmes, David J. Horne, David R. Bridgland   +3 more
wiley   +1 more source

Jewelled Byzantine and Medieval Reliquaries of the True Cross: Peridots and Other Gemstones in Material and Symbolic Perspective

Journal of Raman Spectroscopy, EarlyView.
An interdisciplinary in situ study of jewelled reliquaries of the True Cross integrates gemmology and portable analytical techniques, revealing new evidence on the identification and symbolic role of peridots and other gemstones. ABSTRACT Jewelled crosses containing relics of the True Cross occupy a central position in the devotional, artistic and ...
Stefania Martiniello, Stefano Legnaioli, Simona Raneri   +2 more
wiley   +1 more source

Adaptive Endmember Bundle Extraction With a Modified Differential Evolution Algorithm for Addressing Spectral Variability in Geology-1 Hyperspectral Imagery

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
High-precision extraction of alteration mineral information provides crucial guidance for hyperspectral remote sensing mineral exploration. Currently, widely used hyperspectral datasets (such as ZY-1 02D and GF-5) lack targeted design in spectral ...
Linpei Yang, Ruyi Feng, Banxiao Ruan, Kaijun Yang   +3 more
doaj   +1 more source

Comparison of Image Endmember- and Object-Based Classification of Very-High-Spatial-Resolution Unmanned Aircraft System (UAS) Narrow-Band Images for Mapping Riparian Forests and Other Land Covers

Land, 2022
Riparian forests are critical for carbon storage, biodiversity, and river water quality. There has been an increasing use of very-high-spatial-resolution (VHR) unmanned aircraft systems (UAS)-based remote sensing for riparian forest mapping. However, for
Anthony M. Filippi, İnci Güneralp, Cesar R. Castillo, Andong Ma, Gernot Paulus, Karl-Heinrich Anders   +5 more
doaj   +1 more source

Depositional and Hydrological Relationships Between Buried Dead Ice and the Active Layer in the McMurdo Dry Valleys, Antarctica: A Study of Sediment Geochemistry and Cation Concentrations

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The McMurdo Dry Valleys, the largest ice‐free region in Antarctica, are home to a cold‐desert hydrologic system of glaciers, snowbanks, streams, and lakes. Freshwater is also stored as dead glacial ice, which is poorly constrained in terms of ion concentrations and interactions with both in situ and overlying sediments.
Matthew C. Witscheber, Kate M. Swanger
wiley   +1 more source

Subspace-Based Preprocessing Module for Fast Hyperspectral Endmember Selection

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Endmember extraction algorithms (EEAs) play a crucial role in hyperspectral image (HSI) perception, and yet they normally suffer from three flaws: 1) High computational burden, 2) weak noise robustness, and 3) high outlier sensitivity.
Xiangfei Shen, Wenxing Bao, Kewen Qu
doaj   +1 more source

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

Conservation Biology, EarlyView.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams, Fernando Machado‐Stredel, Rowan C. Martindale, Corinne E. Myers   +3 more
wiley   +1 more source

Subpixel Mapping of Surface Water in the Tibetan Plateau with MODIS Data

Remote Sensing, 2020
This article presents a comprehensive subpixel water mapping algorithm to automatically produce routinely open water fraction maps in the Tibetan Plateau (TP) with the Moderate Resolution Imaging Spectroradiometer (MODIS).
Chenzhou Liu, Jiancheng Shi, Xiuying Liu, Zhaoyong Shi, Ji Zhu   +4 more
doaj   +1 more source