MULTIPATH SIGNAL REMOVAL IN TIME-OF-FLIGHT CAMERA APPARATUS
First Claim
1. A time-of-flight camera apparatus configured to facilitate removal of multipath signal interference from light data, the apparatus comprising:
- an illumination unit for illuminating a target with a light source, wherein;
the illumination unit is configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies;
a sensor unit for acquiring reflected light data reflected from the target, wherein the reflected light data comprises an array of spatial domain information received from light reflected by the target; and
a processing unit for processing the reflected light data, wherein;
the processing unit applies a transformation that isolates a subset of high spatial frequencies in one or more directions within the reflected light data.
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Abstract
A method for facilitating removal of multipath signal interference from light data can comprise illuminating, with an illumination unit, a target with a light source. The illumination unit can be configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies. The method can also comprise acquiring, with a sensor unit, reflected light data reflected from the target. The reflected light data can comprise an array of spatial domain information received from light reflected by the target. Further, the method can comprise processing, with the one or more processors, the reflected light data. The processing applies a high-pass filter within the spatial domain to the reflected light data.
8 Citations
20 Claims
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1. A time-of-flight camera apparatus configured to facilitate removal of multipath signal interference from light data, the apparatus comprising:
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an illumination unit for illuminating a target with a light source, wherein; the illumination unit is configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies; a sensor unit for acquiring reflected light data reflected from the target, wherein the reflected light data comprises an array of spatial domain information received from light reflected by the target; and a processing unit for processing the reflected light data, wherein; the processing unit applies a transformation that isolates a subset of high spatial frequencies in one or more directions within the reflected light data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer system for facilitating removal of multipath signal interference from light data, comprising:
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one or more processors; and one or more computer-readable media having stored thereon executable instructions that when executed by the one or more processors configure the computer system to perform at least the following; illuminate, with an illumination unit, a target with a light source, wherein the illumination unit is configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies; acquire, with a sensor unit, reflected light data reflected from the target, wherein the reflected light data comprises; an array of spatial domain information received from light reflected by the target, and time-of-flight data for light that illuminated the target; generate multipath-compensated light data by processing, with the one or more processors, the reflected light data, wherein the processing applies a high-pass filter within the spatial domain to the reflected light data; and determine, with the one or more processors and based upon the multipath-compensated light data, one or more distances that extend between the sensor unit and one or more portions of the target. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method, implemented at a computer system that includes one or more processors, for facilitating removal of multipath signal interference from light data, the method comprising:
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illuminating, with an illumination unit, a target with a light source, wherein the illumination unit is configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies; acquiring, with a sensor unit, reflected light data reflected from the target, wherein the reflected light data comprises an array of spatial domain information received from light reflected by the target; and processing, with the one or more processors, the reflected light data, wherein the processing applies a high-pass filter within the spatial domain to the reflected light data.
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Specification