1. A method comprising: establishing a plurality of selection regions formed by neighboring thresholds in a plurality of thresholds, each selection region in the plurality of selection regions being associated with an individual combination in a plurality of individual combinations of a set of input signals generated by two or more sensor elements, each individual combination in the plurality of individual combinations of the set of input signals corresponding to a different set of values for a set of weighting factors; determining whether one or more characteristics in the input signals fall in a particular selection region formed by two neighboring thresholds in the plurality of thresholds; in response to determining that the one or more characteristics in the input signals fall in a particular selection region formed by two neighboring thresholds in the plurality of thresholds, selecting the particular selection region associated with a particular combination in the plurality of individual combinations of the set of input signals, the particular combination corresponding to a particular set of values for the set of the weighting factors; and applying the particular set of values for the set of weighting factors to the set of input signals to generate one or more output signals; wherein the method is performed by one or more computing devices.