title: Development of search prefilters for infrared library searching of clear coat paint smears.
abstract: Search prefilters developed from spectral data collected on two 6700 Thermo-Nicolet FTIR spectrometers were able to identify the respective manufacturing plant and the production line of an automotive vehicle from its clear coat paint smear using IR transmission spectra collected on a Bio-Rad 40A or Bio-Rad 60 FTIR spectrometer. All four spectrometers were equipped with DTGS detectors. An approach based on instrumental line functions was used to transfer the classification model between the Thermo-Nicolet and Bio-Rad instruments. In this study, 209 IR spectra of clear coat paint smears comprising the training set were collected using two Thermo-Nicolet 6700 IR spectrometers, whereas the validation set consisted of 242 IR spectra of clear coats obtained using two Bio-Rad FTIR instruments.
authors.affiliation: Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA. Electronic address: bklab@chem.okstate.edu.
authors.forename: Barry K
authors.initials: BK
authors.lastname: Lavine
authors.affiliation: Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
authors.forename: Ayuba
authors.initials: A
authors.lastname: Fasasi
authors.affiliation: Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
authors.forename: Nikhil
authors.initials: N
authors.lastname: Mirjankar
authors.affiliation: Royal Canadian Mounted Police Forensic Laboratory, 15707-118th Avenue, Edmonton, Alberta, T5V 1B7, Canada.
authors.forename: Mark
authors.initials: M
authors.lastname: Sandercock
keywords: Classification transfer; Feature selection; Forensic analysis; Genetic algorithms; Pattern recognition; Search prefilters