Towards many-class classification of materials
based on their spectral fingerprints
Matthias Richter,
Jürgen Beyerer
Kapitel/Beitrag aus dem Buch: Längle, T et al. 2015. OCM 2015 – 2nd International Conference on Optical Characterization of Materials, March 18th – 19th, 2015, Karlsruhe, Germany : Conference Proceedings.
Hyperspectral sensors are becoming cheaper and more
available to the public. It is reasonable to assume that in the near
future they will become more and more ubiquitous. This gives
rise to many interesting applications, for example identification
of pharmaceutical products and classification of food stuffs. Such
applications require a precise models of the underlying classes,
but hand-crafting these models is not feasible. In this paper, we
propose to instead learn the model from the data using machine
learning techniques. We investigate the use of two popular methods: support vector machines and random forest classifiers. In
contrast to similar approaches, we restrict ourselves to linear support vector machines. Furthermore, we train the classifiers by
solving the primal, instead of dual optimization problem. Our
experiments on a large dataset show that the support vector machine approach is superior to random forest in classification accuracy as well as training time.