Indirect monitoring of device usage and activities
First Claim
1. A monitoring apparatus to monitor a region of interest for activity, the apparatus comprising:
- a plurality of sensor channels to produce numerical sequences proportional to energy of at least two energy modalities transferred to respective sensors thereof during commission of an activity; and
a processor to determine whether a known activity is committed by matching dimensionally-reduced representations of the numerical sequences with dimensionally-reduced representations of known numerical sequences containing signal characteristics defined by energy transference in the commission of the known activity, and to provide an indication of the known activity upon positive determination that the match is within a similarity criterion.
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Accused Products
Abstract
Signal characteristics, or signatures, defined by one or more forms of energy being transferred during the commission of an activity are captured in dimensionally-reduced numerical sequences. Dimensionality reduction is achieved such that reduced data acquired during a detection phase can be directly compared with such reduced data produced during system training. Activities, events, human identities and so on can be identified through such direct comparison. Dimensionality reduction, such as through sparse approximation or simultaneous sparse approximation, may produce combinations of scaled prototype functions. Such combinations or their parametric representations compactly describe the signal characteristics for purposes of discovering new activity signatures, of extracting test signals from a set of measurements and of comparing sets for purposes of detection and classification.
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Citations
41 Claims
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1. A monitoring apparatus to monitor a region of interest for activity, the apparatus comprising:
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a plurality of sensor channels to produce numerical sequences proportional to energy of at least two energy modalities transferred to respective sensors thereof during commission of an activity; and a processor to determine whether a known activity is committed by matching dimensionally-reduced representations of the numerical sequences with dimensionally-reduced representations of known numerical sequences containing signal characteristics defined by energy transference in the commission of the known activity, and to provide an indication of the known activity upon positive determination that the match is within a similarity criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A machine-implemented method for monitoring a region of interest for activity, the method comprising:
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forming at least one signature representation containing signature signal characteristics defined by energy transference in committing a known activity; converting energy transferred during commission of an activity into signals having activity signal characteristics; comparing at least one representation of the activity signal characteristics with the signature representations to obtain a similarity measure between the activity signal characteristics and the signature signal characteristics, where at least one of the signature representation and the activity signal representation is dimensionally-reduced from an original signal representation domain prior to the comparison; and reporting the activity as the known activity upon a positive determination that the similarity measure meets a predetermined criterion. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A machine-implemented method of monitoring a region of interest for activity, the method comprising:
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generating training signals to include signal characteristics indicative of commission of a known activity; collecting sensor signals by each of a plurality of sensors in the region of interest, the sensors being constructed to respond to energy transference in a plurality of energy modalities; generating representations of the sensor signals of the energy modalities by which similarities thereof to representations of the signal characteristics in the training signals are comparable; determining whether the signal characteristics are present in the sensor signals from a similarity measure obtained from the representation of the sensor signals and the representation of the signal characteristics of the training signals corresponding to the energy modalities, where at least one of the representations of the signal characteristics of the training signals and of the sensor signals are dimensionally-reduced from that of an original signal representation domain thereof prior to the similarity measure being applied; and indicating commission of the activity in the region of interest upon a positive determination that the similarity measure meets a similarity criterion. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification