Object and movement detection
First Claim
1. A method of tracking an object in the presence of one or more other objects in an imaging field comprising transmitting energy into said imaging field, receiving reflected energy from the imaging field, calculating a series of impulse responses at successive time intervals using said transmitted and received energy wherein the received energy is a convolution of the transmitted energy and the impulse responses, and separately identifying and isolating a subset of said impulse responses corresponding to a continuous motion.
1 Assignment
0 Petitions
Accused Products
Abstract
Motions, positions or configurations off, for example a human hand can be recognized by transmitting a plurality of transmit signals in respective time frames; receiving a plurality of receive signals; determining a plurality of channel impulse responses using the transmit and receive signals; defining a matrix of impulse responses, with impulse responses for adjacent time frames adjacent each other; and analyzing the matrix for patterns (22) corresponding to the motion position or configuration.
18 Citations
31 Claims
- 1. A method of tracking an object in the presence of one or more other objects in an imaging field comprising transmitting energy into said imaging field, receiving reflected energy from the imaging field, calculating a series of impulse responses at successive time intervals using said transmitted and received energy wherein the received energy is a convolution of the transmitted energy and the impulse responses, and separately identifying and isolating a subset of said impulse responses corresponding to a continuous motion.
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17. A method of tracking an object in the presence of one or more other objects in an imaging field comprising transmitting energy into said imaging field, receiving reflected energy from the imaging field, calculating a series of impulse responses at successive time intervals and selecting a subset of said impulse responses corresponding to a continuous motion, further comprising detecting two of a user'"'"'s fingers moving together or apart, wherein said movement together or apart is identified from different direction movements in respective halves or portions of said matrix.
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21. A method of determining movement of one or more objects in an imaging field comprising:
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transmitting a continuous or discontinuous transmit signal; receiving a plurality of receive signals; calculating a plurality of channel impulse responses using said transmit and receive signals, wherein the receive signals are convolutions of the transmit signals and the channel impulse responses; defining a matrix of impulse responses, with impulse responses for respective time intervals adjacent one another; and isolating from said matrix a pattern corresponding to a motion of one of said objects. - View Dependent Claims (22, 23, 24, 25, 26)
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27. Apparatus for tracking an object in the presence of one or more other objects in an imaging field comprising:
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transmission means arranged to transmit energy into said imaging field; receiving means arranged to receive reflected energy from the imaging field; and processing means arranged to calculate a series of impulse responses at successive time intervals using said transmitted and received energy wherein the received energy is a convolution of the transmitted energy and the impulse responses, and to select a subset of said impulse responses corresponding to a continuous motion. - View Dependent Claims (28, 29)
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30. A non-transitory computer readable medium bearing software configured, when run on a computer, to track an object in the presence of one or more other objects in an imaging field, the software having inputs for energy transmission and reflected energy reception and further comprising logic arranged to calculate a series of impulse responses at successive time intervals using said transmitted and received energy wherein the received energy is a convolution of the transmitted energy and the impulse responses, and to separately identify and isolate a subset of said impulse responses corresponding to a continuous motion.
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31. A method of recognising motion of a human hand comprising:
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transmitting a plurality of transmit signals in respective time frames; receiving a plurality of receive signals, at least some of said receive signals being reflected from said hand; determining a plurality of channel impulse responses using said transmit and receive signals wherein the receive signals are convolutions of the transmit signals and the channel impulse responses; removing a contribution of background reflections from the impulse responses; defining a matrix of impulse responses, with impulse responses for adjacent time frames adjacent each other; and analysing said matrix for patterns corresponding to movement of said hand.
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Specification