FEATURE EXTRACTION AND PROCESSING FROM SIGNALS OF SENSOR ARRAYS

Feature extraction includes extracting features from signals of a plurality of sensors of a sensor array, including, for each sensor, obtaining a signal of the sensor corresponding to responses of the sensor during one or more exposures to samples, computing a baseline function from the signal, and computing the features based on the baseline function and values corresponding to responses of the sensor during each exposure. Feature vectors are formed from the features of the sensors. The features in each feature vector correspond to the same exposure. At least one of computing the baseline function by interpolating baseline values corresponding to responses of the sensor prior to each exposure, and forming the feature vectors by combining features of at least one sensor with features of at least one redundant sensor of the sensor array in the feature vectors is performed.