Application of Graph Theory to unsupervised classification of materials by Laser-Induced Breakdown Spectroscopy

Grifoni, Emanuela; Legnaioli, Stefano; Lorenzetti, Giulia; Pagnotta, Stefano; Palleschi, Vincenzo

doi:10.1016/j.sab.2016.02.003

Cited by 21 publications

(11 citation statements)

References 34 publications

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“…The toners' classification was obtained using a new statistical method, the graph clustering method proposed by Grifoni et al 38 The technique was recently used for the classification of LIBS spectra of sedimentary and igneous rocks 39 . According to their similarity, the graph clustering method classifies the LIBS spectra by defining a distance between the spectra.…”

Section: Methodsmentioning

confidence: 99%

Laser‐induced breakdown spectroscopy and chemometric analysis of black toners for forensic applications

Ahmed

Abdel‐Hamid

Abdel‐Salam

et al. 2021

Journal of Chemometrics

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In the present work, laser‐induced breakdown spectroscopy (LIBS) was used to differentiate between different black toners of printers and photocopiers based on their elemental composition. Measurements were performed on 23 toner samples of different printers and six different photocopiers (of different brands and models). The LIBS spectra were compared to characterize each toner type. Multivariate statistical analysis based on PCA and graph clustering was used to develop a discrimination model between the toners in questioned documents. Good discrimination of both brand and model toners was obtained. The results may be beneficial for forensic applications in the investigations of questioned documents.

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Section: Methodsmentioning

confidence: 99%

Laser‐induced breakdown spectroscopy and chemometric analysis of black toners for forensic applications

Ahmed

Abdel‐Hamid

Abdel‐Salam

et al. 2021

Journal of Chemometrics

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“…Common supervised machine learning algorithms that have been used in LIBS studies comprise Principal Component Analysis (PCA) [ 31 ] and k-Means Clustering [ 32 ], while there have been some works that employ some neural network architectures for unsupervised learning, such as Self-Organizing Maps (SOMs) [ 33 ] and Restricted Boltzmann Machines (RBMs) [ 34 ]. Less commonly, graph theory-based algorithms have been also used for the treatment of LIBS spectra in an unsupervised manner, with impressive results [ 35 ].…”

Section: Chemometrics and Machine/deep Learning For Libsmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy: An Efficient Tool for Food Science and Technology (from the Analysis of Martian Rocks to the Analysis of Olive Oil, Honey, Milk, and Other Natural Earth Products)

et al. 2021

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Laser-Induced Breakdown Spectroscopy (LIBS), having reached a level of maturity during the last few years, is generally considered as a very powerful and efficient analytical tool, and it has been proposed for a broad range of applications, extending from space exploration down to terrestrial applications, from cultural heritage to food science and security. Over the last decade, there has been a rapidly growing sub-field concerning the application of LIBS for food analysis, safety, and security, which along with the implementation of machine learning and chemometric algorithms opens new perspectives and possibilities. The present review intends to provide a short overview of the current state-of-the-art research activities concerning the application of LIBS for the analysis of foodstuffs, with the emphasis given to olive oil, honey, and milk.

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“…BC) in Sardinia (see figure 8). A blind clustering analysis of the LIBS spectra based on Graph Theory [122] helped in determining the provenance of raw materials employed for the artefacts, indicating the compatibility of all analysed statue samples with geological outcrops from Santa Caterina di Pittinuri area. The potential of LIBS for underwater analysis of marbles has been demonstrated in 2005 by Lazic et al [123] and by Guirado et al in [124].…”

Section: Libs Analysis Of Geological Materialsmentioning

confidence: 99%

Applications of laser-induced breakdown spectroscopy in cultural heritage and archaeology: a critical review

Botto

Campanella

Legnaioli

et al. 2019

J. Anal. At. Spectrom.

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129

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Application of Graph Theory to unsupervised classification of materials by Laser-Induced Breakdown Spectroscopy

Cited by 21 publications

References 34 publications

Laser‐induced breakdown spectroscopy and chemometric analysis of black toners for forensic applications

Laser‐induced breakdown spectroscopy and chemometric analysis of black toners for forensic applications

Laser-Induced Breakdown Spectroscopy: An Efficient Tool for Food Science and Technology (from the Analysis of Martian Rocks to the Analysis of Olive Oil, Honey, Milk, and Other Natural Earth Products)

Applications of laser-induced breakdown spectroscopy in cultural heritage and archaeology: a critical review

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