Application of a likelihood ratio approach insolving a comparison problem of Raman spectrarecorded for blue automotive paints
PBN-AR
Instytucja
Wydział Matematyki, Fizyki i Chemii (Uniwersytet Śląski w Katowicach)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
JOURNAL OF RAMAN SPECTROSCOPY
ISSN
0377-0486
EISSN
1097-4555
Wydawca
WILEY-BLACKWELL
DOI
URL
Rok publikacji
2015
Numer zeszytu
9
Strony od-do
772-783
Numer tomu
46
Identyfikator DOI
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Autorzy
(liczba autorów: 4)
Pozostali autorzy
+ 3
Słowa kluczowe
EN
blue car paints
Comparison problem
forensic science
Likelihood ratio
Raman spectroscopy
Streszczenia
Język
EN
Treść
Evidential values of Raman spectra recorded for solid and metallic blue car paints were evaluated using visual comparison as wellas a statistical approach, i.e. likelihood ratio (LR) test supported by Empirical Cross Entropy (ECE) results. Raman spectra were ob-tained using a Renishaw inVia spectrometer equipped with a confocal Leica microscope and a near infrared semiconductor laser(785 nm) as an excitation source.When a visual comparison was performed for solid paints, in 17.7% of comparisons (53 pairs out of 300) the samples were in-distinguishable, whereas for metallic paints this value was 8.5% of such comparisons (37 pairs out of 435). Comparing the spectrausing an LR approach was based on variables being the areas under the most significant Raman spectra bands of pigments pres-ent in the analysed samples. Proposed LR models delivered low false positive and false negative rates (for many models lower than10%), and the ECE plots confirmed that their performance was much better than visual comparison.
Inne
System-identifier
0192800140192
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