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US 11,630,190 B2Granted
Electronic device, method and computer program
AssigneeSony Semiconductor Solutions Corporation
InventorsJeroen Hermans, Victor Belokonskiy, Fabian Krome
Life of this patent
Estimating the term…
Abstract
An electronic device comprising circuitry configured to sample, in a calibration phase using a known time-of-flight τD, a first set of differential mode measurements μcal (nΔτE,τD) according to a first sampling strategy tEcal, and to determine Fourier coefficients Mk of the first set of differential mode measurements μcal(τE,n,τD) based on the known time-of-flight (τD) used in the calibration phase, and to determine a cyclic error (fCE(θ1,μ(τD);x)) based on the Fourier coefficients (Mk).
Claims22
An electronic device comprising:
- circuitry configured to:
- sample, in a calibration phase using a known time-of-flight, a first set of differential mode measurements according to a first sampling strategy,
- determine Fourier coefficients of the first set of differential mode measurements based on the known time-of-flight used in the calibration phase,
- determine a cyclic error based on the Fourier coefficients, and
- perform a runtime calibration of image data obtained by a time-of-flight camera to remove the cyclic error, the image data having an unknown time-of-flight,
- wherein the circuitry is configured to determine the Fourier coefficients according to
- M
- k
- ≈
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- j
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-
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-
- kf
- M
-
- τ
- D
-
- ∑
- n
- =
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- N
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- cal
- -
- 1
- μ
- c
-
- a
-
- l
- (
- n
-
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-
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- ,
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- j
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-
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-
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- N
- D
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- with NDcal being a number of samples used according to the first sampling strategy, μcal(nΔτE,τD) being differential mode measurements of the first set of differential mode measurements, k indicating harmonics, fM being a modulation frequency, and τD being the known time-of-flight used in the calibration phase.
65 more elements
An electronic device comprising:
- circuitry configured to:
- determine, at runtime, a cyclic error based on Fourier coefficients, aliasing weights, which compensate for at least one of phase offset and phase shift, and a known time-of-flight used in a calibration phase, and
- perform a runtime calibration of image data obtained by a time-of-flight camera to remove the cyclic error, the image data having an unknown time-of-flight,
- wherein the circuitry is configured to determine the Fourier coefficients according to
- M
- k
- ≈
- e
- j
-
- 2
-
- π
-
- k
-
- f
- M
-
- τ
- D
-
- ∑
- n
- =
- 0
- N
- D
- cal
- -
- 1
- μ
- c
-
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-
- l
- (
- n
-
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- τ
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- N
- D
- c
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- a
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- with NDcal being a number of samples used according to a first sampling strategy, μcal(nΔτE,τD) being differential mode measurements of a first set of differential mode measurements, k indicating harmonics, fM being a modulation frequency, and τD being the known time-of-flight used in the calibration phase.
65 more elements
Dependencies are inferred from the claim text.