Optical expression detection
AssigneeEmteq Limited
InventorsCharles Nduka, Andrew Cleal, James Archer, Mohsen Fatoorechi
Life of this patent
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Abstract
Some embodiments are directed to a biometric authentication system including headwear having a plurality of biosensors each configured to sample muscle activity so as to obtain a respective time-varying signal, a data store for storing a data set representing characteristic muscle activity for one or more users, and a processor configured to process the time-varying signals from the biosensors in dependence on the stored data set so as to determine a correspondence between a time-varying signal and characteristic muscle activity of one of the one or more users, and in dependence on the determined correspondence, authenticate the time-varying signals as being associated with that user.
Claims20
A system for detecting facial muscle activity comprising:
- wearable apparatus comprising an optical flow sensors located so as to, in use when the apparatus is worn, image an area of skin associated with one or more facial muscles, the optical flow sensor being configured to capture time-varying data describing movement of the respective area of skin substantially in the plane of the imaged area of skin, wherein the optical flow sensor is configured to receive light from a plurality of areas of skin over one or more optical fibres;
- and
- wherein the wearable apparatus further comprises an optical switch configured to alternately provide light received from each of at least two of the plurality of areas of skin to the optical flow sensor, the optical switch being synchronised with the sampling rate of the optical flow sensor such that the optical flow sensor is configured to alternately sample different areas of skin.
A wearable apparatus for detecting facial skin movement comprising an optical flow sensor located so as to, in use when the apparatus is worn, image an area of skin associated with one or more facial muscles, the optical flow sensor being configured to capture time-varying data describing movement of the respective area of skin substantially in the plane of the imaged area of skin;
- and
- wherein the optical flow sensor is configured to receive light from a plurality of areas of skin over one or more optical fibres;
- and
- wherein the wearable apparatus further comprises an optical switch configured to alternately provide light received from each of at least two of the plurality of areas of skin to the optical flow sensor, the optical switch being synchronised with the sampling rate of the optical flow sensor such that the optical flow sensor is configured to alternately sample different areas of skin.
Dependencies are inferred from the claim text.