Rapid Localization of Bone Fragments on Surfaces using Back-Projection and Hyperspectral Imaging†
Corresponding Author
Bjørn K. Alsberg Ph.D.
Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway
Additional information and reprint requests:
Bjørn K. Alsberg, Ph.D.
Department of Chemistry
Norwegian University of Science and Technology (NTNU)
P.B. 7491, Trondheim
Norway
E-mail: [email protected]
Search for more papers by this authorJørgen Rosvold Ph.D.
Section of Natural History, NTNU University Museum, N-7491, Trondheim, Norway
Search for more papers by this authorCorresponding Author
Bjørn K. Alsberg Ph.D.
Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway
Additional information and reprint requests:
Bjørn K. Alsberg, Ph.D.
Department of Chemistry
Norwegian University of Science and Technology (NTNU)
P.B. 7491, Trondheim
Norway
E-mail: [email protected]
Search for more papers by this authorJørgen Rosvold Ph.D.
Section of Natural History, NTNU University Museum, N-7491, Trondheim, Norway
Search for more papers by this authorAbstract
Manual localization of bone fragments on the ground or on complex surfaces in relation to accidents or criminal activity may be time-consuming and challenging. It is here investigated whether combining a near-infrared hyperspectral camera and chemometric modeling with false color back-projection can be used for rapid localization of bone fragments. The approach is noninvasive and highlights the spatial distribution of various compounds/properties to facilitate manual inspection of surfaces. Discriminant partial least squares regression is used to classify between bone and nonbone spectra from the hyperspectral camera. A predictive model (>95% prediction ability) is constructed from raw chicken bones mixed with stone, sand, leaves, moss, and wood. The model uses features in the near-infrared spectrum which may be selective for bones in general and is able to identify a wide variety of bones from different animals and contexts, including aged and weathered bone.
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