Pattern-Based Linear Unmixing for Efficient and Reliable Analysis of Multicomponent TCSPC Data

Spectral unmixing has proven to be a great tool for the analysis of hyperspectral data, with linear mixing models (LMMs) being the most used in the literature. Nevertheless, due to the limitations of the LMMs to accurately describe the multiple light scattering effects in multi and hyperspectral imaging, new mixing models have emerged to describe nonlinear interactions. In this paper, we propose a new nonlinear unmixing algorithm based on a multilinear mixture model called Non-linear Extended Blind Endmember and Abundance Extraction (NEBEAE), which is based on a linear unmixing method established in the literature. The results of this study show that proposed method decreases the estimation errors of the spectral signatures and abundance maps, as well as the execution time with respect the state of the art methods.

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Using a Linear Unmixing Method to Improve Passive Microwave Snow Depth Retrievals

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing ◽

10.1109/jstars.2018.2870752 ◽

2018 ◽

Vol 11 (11) ◽

pp. 4414-4429 ◽

Cited By ~ 5

Author(s):

Xiaojing Liu ◽

Lingmei Jiang ◽

Gongxue Wang ◽

Shirui Hao ◽

Zhizhong Chen

Keyword(s):

Snow Depth ◽

Passive Microwave ◽

Linear Unmixing

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Minimizing the impact of Joule heating as a prerequisite for the reliable analysis of metal‐protein complexes by capillary electrophoresis

Journal of Chromatography A ◽

10.1016/j.chroma.2017.03.028 ◽

2017 ◽

Vol 1495 ◽

pp. 83-87 ◽

Cited By ~ 3

Author(s):

Paweł Mateusz Nowak ◽

Klaudyna Śpiewak ◽

Michał Woźniakiewicz ◽

Paweł Kościelniak

Keyword(s):

Capillary Electrophoresis ◽

Joule Heating ◽

Protein Complexes ◽

Reliable Analysis ◽

The Impact

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Multispectral Bathymetry via Linear Unmixing of the Benthic Reflectance

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing ◽

10.1109/jstars.2018.2874684 ◽

2018 ◽

Vol 11 (11) ◽

pp. 4349-4363 ◽

Cited By ~ 5

Author(s):

Yongming Liu ◽

Ruru Deng ◽

Jun Li ◽

Yan Qin ◽

Longhai Xiong ◽

...

Keyword(s):

Linear Unmixing

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ExEm-FRET two-hybrid assay: FRET two-hybrid assay based on linear unmixing of excitation-emission spectra

Optics Express ◽

10.1364/oe.27.018282 ◽

2019 ◽

Vol 27 (13) ◽

pp. 18282

Author(s):

Chenshuang Zhang ◽

Yangpei Liu ◽

Wenfeng Qu ◽

Wenhua Su ◽

Mengyan Du ◽

...

Keyword(s):

Emission Spectra ◽

Linear Unmixing ◽

Two Hybrid

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Identification and mapping of ancient pigments in a Roman Egyptian funerary portrait by application of reflectance and luminescence imaging spectroscopy

Heritage Science ◽

10.1186/s40494-021-00639-5 ◽

2022 ◽

Vol 10 (1) ◽

Author(s):

Roxanne Radpour ◽

Glenn A. Gates ◽

Ioanna Kakoulli ◽

John K. Delaney

Keyword(s):

Molecular Spectroscopy ◽

Imaging Spectroscopy ◽

Chemical Mapping ◽

Spectral Signatures ◽

Egyptian Blue ◽

Non Invasive ◽

Analytical Protocol ◽

Linear Unmixing ◽

New Applications ◽

Madder Lake

AbstractImaging spectroscopy (IS) is an important tool in the comprehensive technical analysis required of archaeological paintings. The complexity of pigment mixtures, diverse artistic practices and painting technologies, and the often-fragile and weathered nature of these objects render macroscale, non-invasive chemical mapping an essential component of the analytical protocol. Furthermore, the use of pigments such as Egyptian blue and madder lake, featuring diagnostic photoluminescence emission, provides motivation to perform photoluminescence mapping on the macroscale. This work demonstrates and advances new applications of dual-mode imaging spectroscopy and data analysis approaches for ancient painting. Both reflectance (RIS) and luminescence (LIS) modes were utilized for the study of a Roman Egyptian funerary portrait from second century CE Egypt. The first derivative of the RIS image cube was analyzed and found to significantly improve materials separation, identification, and the extent of mapping. Egyptian blue and madder lake were mapped across a decorated surface using their luminescence spectral signatures in the region of 540–1000 nm as endmembers in LIS analyses. Linear unmixing of the LIS endmembers and subsequent derivative analyses resulted in an improved separation and mapping of the luminescence pigments. RIS and LIS studies, combined with complementary, single-spot collection elemental and molecular spectroscopy, were able to successfully characterize the portrait’s painting materials and binding media used by the ancient artist, providing key insight into their material use, stylistic practices, and technological choices.

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