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US 8,638,991 B2Granted
Motion detection system and method
AssigneesBar-Ilan University, Universtitat de Valencia
InventorsZeev Zalevsky, Javier Garcia
Life of this patent
Estimating the term…
Abstract
A method is presented for imaging an object. The method comprises imaging a coherent speckle pattern propagating from an object, using an imaging system being focused on a plane displaced from the object.
Claims40
A method for use in motion detection of an object, the method comprising:
- providing a system comprising a source of a beam of coherent light and an imaging system capable of being focused on a plane displaced from an intersection of the beam and a field of view of the imaging system and being in a far field from said intersection;
- operating said system for illuminating an object by the beam of coherent light, and imaging the coherent speckle pattern, originated at and propagating from the object, while focusing the imaging system on a plane being in a far field of the object and being located further than D2/4λ from the object, D and λ being respectively a size and a wavelength of the speckle pattern at the object.
A system for use in motion detection, the system comprising:
- a source of a beam of coherent light and an imaging system, said imaging system being capable of being focused on a plane displaced from an intersection of the beam and a field of view of the imaging system and being in a far field from said intersection;
- and
- a processing unit associated with said imaging system, said processing unit being configured and operable to determine a shift between two images of a speckle pattern originated at the intersection location, said processing unit being configured for communication with a device comprising a memory unit, comprising data indicative of a sequence of images of a stationary coherent speckle pattern originated at a subject, being indicative of the subject's heart beats and/or heart beat structure, said sequence being thereby enabled for use in determination of at least one physiological parameter.
A system for use in for use in motion detection, the system comprising:
- a source of a beam of coherent light and an imaging system, said imaging system being capable of being focused on a plane displaced from an intersection of the beam and a field of view of the imaging system;
- and
- a processing unit associated with said imaging system, said processing unit being configured and operable to determine a shift between two images of a speckle pattern originated at the intersection location, wherein said processing unit is configured for communication with a device comprising a memory unit comprising data indicative of a sequence of images of a stationary speckle pattern originated at a subject, said sequence being indicative of the subject's speech.
A system for use in for use it motion detection, the system comprising:
- a source of a beam of coherent light and an imaging system, said imaging being capable of being focus on a plane displaced from an intersection of the beam and a field of view of the imaging system;
- and
- a processing unit associated with said imaging system, said processing unit being configured and operable to determine a shift between two images of a speckle pattern originated at the intersection location, wherein said processing unit is configured for communication with a device comprising a memory comprising data indicative of a sequence of images of a stationary speckle pattern originated at a vehicle, the images being indicative of vibrations associated with the vehicle and the sequence being indicative of the vehicle operation.
A method for use in motion detection of an object, the method comprising:
- providing a system comprising a source of a beam of coherent light and an imaging system capable of being focused on a plane displaced from an intersection of the beam and a field of view of the imaging system;
- operating said system for illuminating an object by the beam of coherent light, and imaging the coherent speckle pattern, originated at and propagating from the object, by an imaging system being focused on a plane displaced from the object;
- and
- determining at least one shift between regions of the object which appear in at least first and second images of the object, each of said regions including the stationary speckle pattern formed by light originated at the same region of the object and imaged by focusing the imaging system on the plane which is displaced from the object.
1 more element
Dependencies are inferred from the claim text.