scholarly journals Search prefilters for mid-infrared absorbance spectra of clear coat automotive paint smears using stacked and linear classifiers

2014 ◽  
Vol 28 (5) ◽  
pp. 385-394 ◽  
Author(s):  
Barry K. Lavine ◽  
Ayuba Fasasi ◽  
Nikhil Mirjankar ◽  
Mark Sandercock ◽  
Steven D. Brown
Keyword(s):  
Clear Coat ◽  
Mid Infrared ◽  
Linear Classifiers ◽  
Automotive Paint ◽  
Absorbance Spectra

scholarly journals Library Search Prefilters for Vehicle Manufacturers to Assist in the Forensic Examination of Automotive Paints

2017 ◽  
Vol 72 (3) ◽  
pp. 476-488 ◽  
Author(s):  
Barry K. Lavine ◽  
Collin G. White ◽  
Tao Ding
Keyword(s):  
Pattern Recognition ◽  
Ir Spectra ◽  
General Motors ◽  
Discrete Wavelet ◽  
Vehicle Manufacturer ◽  
Clear Coat ◽  
Discrimination Power ◽  
Paint Systems ◽  
Automotive Paint ◽  
Spectral Libraries

Pattern recognition techniques have been applied to the infrared (IR) spectral libraries of the Paint Data Query (PDQ) database to differentiate between nonidentical but similar IR spectra of automotive paints. To tackle the problem of library searching, search prefilters were developed to identify the vehicle make from IR spectra of the clear coat, surfacer–primer, and e-coat layers. To develop these search prefilters with the appropriate degree of accuracy, IR spectra from the PDQ database were preprocessed using the discrete wavelet transform to enhance subtle but significant features in the IR spectral data. Wavelet coefficients characteristic of vehicle make were identified using a genetic algorithm for pattern recognition and feature selection. Search prefilters to identify automotive manufacturer through IR spectra obtained from a paint chip recovered at a crime scene were developed using 1596 original manufacturer’s paint systems spanning six makes (General Motors, Chrysler, Ford, Honda, Nissan, and Toyota) within a limited production year range (2000–2006). Search prefilters for vehicle manufacturer that were developed as part of this study were successfully validated using IR spectra obtained directly from the PDQ database. Information obtained from these search prefilters can serve to quantify the discrimination power of original automotive paint encountered in casework and further efforts to succinctly communicate trace evidential significance to the courts.

Discrimination of 1990s Original Automotive Paint Systems: A Collaborative Study of Black Nonmetallic Base Coat/Clear Coat Finishes Using Infrared Spectroscopy

2001 ◽  
Vol 46 (1) ◽  
pp. 14908J ◽  
Author(s):  
Scott Ryland ◽  
Gregory Bishea ◽  
Leanora Brun-Conti ◽  
Michael Eyring ◽  
Beth Flanagan ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Collaborative Study ◽  
Clear Coat ◽  
Paint Systems ◽  
Automotive Paint

Powder Clear Coat -- A Quantum Leap in Automotive Paint Technology

2000 ◽  
Author(s):  
Walter Wimmer
Keyword(s):  
Clear Coat ◽  
Automotive Paint ◽  
Quantum Leap

Simulation of Attenuated Total Reflection Infrared Absorbance Spectra: Applications to Automotive Clear Coat Forensic Analysis

2014 ◽  
Vol 68 (5) ◽  
pp. 608-615 ◽  
Author(s):  
Barry K. Lavine ◽  
Ayuba Fasasi ◽  
Nikhil Mirjankar ◽  
Koichi Nishikida ◽  
Jay Campbell
Keyword(s):  
Forensic Analysis ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Clear Coat ◽  
Absorbance Spectra

AMICA: the Antarctic Mid-Infrared CAmera for the IRAIT telescope

2005 ◽  
Vol 14 ◽  
pp. 337-342 ◽  
Author(s):  
M. Dolci ◽  
G. Valentini ◽  
O. Straniero ◽  
G. Di Rico ◽  
M. Ragni ◽  
...  
Keyword(s):  
Infrared Camera ◽  
Mid Infrared ◽  
The Antarctic

New developments in mid-infrared Sb-based lasers

1999 ◽  
Vol 09 (PR2) ◽  
pp. Pr2-79 ◽  
Author(s):  
A. Joullié
Keyword(s):  
Mid Infrared ◽  
New Developments

Linear and Nonlinear Optical Properties of Natural Dyes Freestanding Films and Application in Optical Limiting

2020 ◽  
pp. 139-143
Keyword(s):  
Absorption Coefficient ◽  
Water Solution ◽  
Optical Limiting ◽  
Refraction Index ◽  
Laser Wavelength ◽  
Solid State Laser ◽  
Natural Dyes ◽  
Linear And Nonlinear ◽  
532 Nm ◽  
Absorbance Spectra

Natural dyes were followed and prepared from a pomegranate, purple carrot, and eggplant peel. The absorbance spectra was measured in the wavelength range 300-800 nm. The linear properties measurements of the prepared natural dye freestanding films were determined include absorption coefficient (α0), extinction coefficient (κ), and linear refraction index (n). The nonlinear refractive index n2 and nonlinear absorption coefficient β2 of the natural dyes in the water solution were measured by the optical z-scan technique under a pumped solid state laser at a laser wavelength of 532 nm. The results indicated that the pomegranate dye can be promising candidates for optical limiting applications with significantly low optical limiting of 3.5 mW.

SIMULATION OF ELECTROSTATIC ROTARY BELL SPRAY PAINTING IN AUTOMOTIVE PAINT SHOPS

2013 ◽  
Vol 23 (1) ◽  
pp. 25-45 ◽  
Author(s):  
A. Mark ◽  
Bjorn Andersson ◽  
S. Tafuri ◽  
K. Engstrom ◽  
H. Sorod ◽  
...  
Keyword(s):  
Spray Painting ◽  
Automotive Paint

MID-INFRARED BROADBAND ABSORPTION BASED ON HBN/METAL HETEROSTRUCTURES

2018 ◽  
Author(s):  
Y. H. Kan ◽  
Changying Zhao ◽  
Zhuomin M. Zhang
Keyword(s):  
Mid Infrared ◽  
Broadband Absorption

Examination of quantum-well infrared detectors using mid-infrared free-electron laser

2004 ◽  
Author(s):  
L. B. Lin ◽  
W. Xu ◽  
J. L. Nie ◽  
J. Z. Liao ◽  
M. Zhang ◽  
...  
Keyword(s):  
Quantum Well ◽  
Free Electron ◽  
Free Electron Laser ◽  
Infrared Detectors ◽  
Mid Infrared
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