The evidential value of microspectrophotometry measurements made for pen inks

Martyna, Agnieszka and Lucy, David and Zadora, Grzegorz and Trzcinska, Beata and Ramos, Daniel and Parczewski, Andrzej (2013) The evidential value of microspectrophotometry measurements made for pen inks. Analytical Methods, 2013 (23). pp. 6788-6795. ISSN 1759-9660

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Abstract

Three colour systems, defined by the International Commission on Illumination (CIE), have been used to parametrise spectra from microspectrophotometry in the visible range for ten replicates of each of forty inks. The parametrised spectra were used to calculate a likelihood ratio (LR) for pairwise comparisons under the propositions implying that any ink from some suspect document came from the same pen, as that from a control document, versus, the converse proposition which implies the ink from the suspect document came from some other pen. Both univariate and bivariate likelihood ratios for each colour system were calculated. Empirical cross-entropy was selected as an appropriate measure of performance for each system. The bivariate combinations of the CIE-xyz colour system achieve the best results as well as a bivariate combination of a and b variables within the CIE-Lab colour system.

Item Type:
Journal Article
Journal or Publication Title:
Analytical Methods
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1602
Subjects:
ID Code:
69005
Deposited By:
Deposited On:
27 Mar 2014 00:03
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:08