Conference paper
Data representation and feature selection for colorimetric sensor arrays used as explosives detectors
Within the framework of the strategic research project Xsense at the Technical University of Denmark, we are developing a colorimetric sensor array which can be useful for detection of explosives like DNT, TNT, HMX, RDX and TATP and identification of volatile organic compounds in the presence of water vapor in air.
In order to analyze colorimetric sensors with statistical methods, the sensory output must be put into numerical form suitable for analysis. We present new ways of extracting features from a colorimetric sensor and determine the quality and robustness of these features using machine learning classifiers.
Sensors, and in particular explosive sensors, must not only be able to classify explosives, they must also be able to measure the certainty of the classifier regarding the decision it has made. This means there is a need for classifiers that not only give a decision, but also give a posterior probability about the decision.
We will compare K-nearest neighbor, artificial neural networks and sparse logistic regression for colorimetric sensor data analysis. Using the sparse solutions we perform feature selection and feature ranking and compare to Gram-Schmidt orthogonalization.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2011 |
| Pages: | 1-6 |
| Proceedings: | 2011 IEEE International Workshop on Machine Learning for Signal Processing |
| Series: | Machine Learning for Signal Processing |
| ISBN: | 1457716216 , 1457716224 , 1457716232 , 9781457716218 , 9781457716225 and 9781457716232 |
| ISSN: | 21610363 and 15512541 |
| Types: | Conference paper |
| DOI: | 10.1109/MLSP.2011.6064615 |
| ORCIDs: | Alstrøm, Tommy Sonne , Larsen, Jan , Jakobsen, Mogens Havsteen and Boisen, Anja |
Compounds DNT Data models Explosives Feature extraction Gram-Schmidt orthogonalization Image color analysis K-nearest neighbor (KNN) Principal component analysis Sensor arrays TNT a posterior probability air artificial neural networks (ANN) chemical sensors chemo-selective compounds classification colorimeters colorimetric sensor array colorimetric sensor arrays data analysis data representation data structures explosives explosives detection explosives detectors feature extraction feature ranking feature selection learning (artificial intelligence) machine learning classifiers maximum likelihood estimation organic compounds pattern classification sensor arrays sparse logistic regression (SLR) statistical analysis statistical methods volatile organic compounds water vapor
