System and method for recognition of a three-dimensional target
AssigneesUniversity of Connecticut Center for Science & Technology Commercialization, The United States of America as represented by the Secretary of the Air Force, University of Connecticut
InventorsBahram Javidi, Seokwon Yeom, Edward Alan Watson
Life of this patent
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Abstract
A system for recognition of a target three-dimensional object is disclosed. The system may include a photon-counting detector and a three-dimensional integral imaging system. The three-dimensional integral imaging system may be positioned between the photon-counting detector and the target three-dimensional object.
Claims18
A system for recognition of a target three-dimensional object, the system comprising:
- a photon-counting detector;
- a three-dimensional integral imaging system positioned between the photon-counting detector and the target three-dimensional object, and structured to generate a photon-limited elemental image of the target three-dimensional object;
- and
- a signal analyzer structured to correlate the photon-limited elemental images with a reference image and generate a correlation value Crs(xi, v), wherein v is the power of a photon-limited image intensity, and x is a position vector;
- wherein the correlation value is given by:
- C
- rs
-
- (
- x
- j
- ;
- v
- )
- =
- ∑
- i
- =
- 1
- N
- T
-
- R
-
- (
- x
- i
- +
- x
- j
- )
-
- S
- ^
-
- (
- x
- i
- )
- (
- ∑
- i
- =
- 1
- N
- T
-
- R
- 2
-
- (
- x
- i
- )
- )
- 1
- 2
-
- (
- ∑
- i
- =
- 1
- N
- T
-
- S
- ^
-
- (
- x
- i
- )
- )
- v
- =
- ∑
- k
- =
- 1
- N
-
- R
-
- (
- x
- k
- +
- x
- j
- )
- A
-
- (
- ∑
- i
- =
- 1
- N
- T
-
- S
- ^
-
- (
- x
- i
- )
- )
- v
- ,
-
- wherein
-
-
- A
- =
- (
- ∑
- i
- =
- 1
- N
- T
-
- R
- 2
-
- (
- x
- i
- )
- )
- 1
- 2
- ;
- and
- N is the a total number of photons detected R is a radiance of the reference image, Ŝ is a photon-limited image, NT is a total number of pixels, v is the power of a photon-limited image intensity, and x is a position vector.
A method for recognizing a target three-dimensional object, the method comprising:
- generating a photon limited image of the target three-dimensional object;
- recording the photon-limited image with a photon-counting detector;
- using the recorded photon-limited image to determine whether the target three-dimensional object matches a reference object by correlating the photon-limited elemental images with a reference image and generating a correlation value Crs(xj, v);
- wherein the correlation value Crs(xj, v) is defined as:
- C
- rs
-
- (
- x
- j
- ;
- v
- )
- =
- ∑
- i
- =
- 1
- N
- T
-
- R
-
- (
- x
- i
- +
- x
- j
- )
-
- S
- ^
-
- (
- x
- i
- )
- (
- ∑
- i
- =
- 1
- N
- T
-
- R
- 2
-
- (
- x
- i
- )
- )
- 1
- 2
-
- (
- ∑
- i
- =
- 1
- N
- T
-
- S
- ^
-
- (
- x
- i
- )
- )
- v
- =
- ∑
- k
- =
- 1
- N
-
- R
-
- (
- x
- k
- +
- x
- j
- )
- A
-
- (
- ∑
- i
- =
- 1
- N
- T
-
- S
- ^
-
- (
- x
- i
- )
- )
- v
- ,
-
- wherein
-
-
- A
- =
- (
- ∑
- i
- =
- 1
- N
- T
-
- R
- 2
-
- (
- x
- i
- )
- )
- 1
- 2
- ;
- and
- N is the a total number of photons detected, R is a radiance of the reference image, S is a photon-limited image, NT is a total number of pixels, v is the power of a photon-limited image intensity, and x is a position vector.
A system for recognition of a target three-dimensional object, the system comprising:
- at least one photon-counting detector;
- and
- a three-dimensional integral imaging system positioned between the photon-counting detector and the target three-dimensional object;
- wherein a mean of photon-counts np(x) for a photon-counting detector of the at least one photon-counting detector, centered on a position vector x, for all x, during a time interval τ, satisfies the following relationship:
- n
- p
-
- (
- x
- )
- =
- η
-
-
- E
-
- (
- x
- )
- h
-
- v
- _
-
- τ
- ⪡
- 1
- ,
- wherein η is a quantum efficiency of the detection process, E(x) is a power incident on the photon-counting detector centered on a position vector x, h is Plank's constant, and ν is a mean frequency of a quasi-monochromatic light source.
A method for recognizing a target three-dimensional object, the method comprising:
- generating a photon limited image of the target three-dimensional object;
- recording the photon-limited image with at least one photon-counting detector;
- and
- using the recorded photon-limited image to determine whether the target three-dimensional object matches a reference object;
- and
- wherein a mean of photon-counts np(x) for a photon-counting detector of the at least one photon-counting detector, centered on a position vector x, for all x, during a time interval τ, satisfies the following relationship:
- n
- p
-
- (
- x
- )
- =
- η
-
-
- E
-
- (
- x
- )
- h
-
- v
- _
-
- τ
- ⪡
- 1
- ,
- wherein η is a quantum efficiency of the detection process, E(x) is a power incident on the photon-counting detector centered on a position vector x, h is Plank's constant, and ν is a mean frequency of a quasi-monochromatic light source.
Dependencies are inferred from the claim text.