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Optical unmixing using programmable spectral source based on DMD

: Luo, D.; Bauer, S.; Taphanel, M.; Längle, Thomas; Puente Leon, F.; Beyerer, Jürgen


Druy, Mark A. (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Next-Generation Spectroscopic Technologies IX : 18-19 April 2016, Baltimore, Maryland, United States
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9855)
ISBN: 978-1-5106-0096-6
Paper 98550P, 9 S.
Conference "Next-Generation Spectroscopic Technologies" <9, 2016, Baltimore/Md.>
Fraunhofer IOSB ()
spectral unmixing; hyperspectral imaging; DMD; tunable light source

Traditional spectral unmixing involves intense signal processing applied on multispectral or hyperspectral data captured from an imaging device, which is highly time-consuming. In this article, a novel method, namely "optical unmixing", is proposed to alleviate the post processing effort by replacing the heavy computation with a spectrally tunable light source. By choosing spectral features of the light source intelligently, the abundance map of each material can be retrieved with minimum computation from gray value images captured by a normal camera. For n unknown endmembers, 3n + 1 measurements are required to retrieve the abundance maps with proposed algorithms.