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公开(公告)号：US20200097752A1
公开(公告)日：2020-03-26
申请号：US16142544
申请日：2018-09-26
Inventor： Francois De Salivet de Fouchecour , Stuart McLeod , Donald Baxter , Olivier Pothier , Thierry Lebihen
Abstract: An embodiment device includes: a plurality of optical emitters configured to emit incident radiation within a field of view of the device; a plurality of optical detectors configured to receive reflected radiation and to generate a histogram based on the incident radiation and the reflected radiation, the histogram being indicative of a number of photon events detected by the plurality of optical detectors over a plurality of time bins, the plurality of time bins being indicative of a plurality of time differences between emission of the incident radiation and reception of the reflected radiation; and a processor configured to iteratively process the histogram by executing an expectation-maximization algorithm to detect a presence of objects located in the field of view of the device.
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公开(公告)号：US10796191B2
公开(公告)日：2020-10-06
申请号：US16142544
申请日：2018-09-26
Inventor： Francois De Salivet de Fouchecour , Stuart McLeod , Donald Baxter , Olivier Pothier , Thierry Lebihen
Abstract: An example device has optical emitters for emitting incident radiation within a field of view and optical detectors for receiving reflected radiation. Based on the incident radiation and the reflected radiation, a histogram indicative of a number of photon events that are detected by the optical detectors over time bins is generated. The time bins is indicative of time differences between emission of the incident radiation and reception of the reflected radiation. The device further includes; a processor programmed to iteratively process the histogram by executing an expectation-maximization algorithm to detect a presence of objects located in the field of view of the device.
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公开(公告)号：US20220308173A1
公开(公告)日：2022-09-29
申请号：US17655727
申请日：2022-03-21
Applicant: STMICROELECTRONICS SA
Inventor： Olivier Pothier , Victor Macela , Thierry Lebihen , Arnaud Bourge
Abstract: Method, having detecting from a first histogram signal delivered by a sensor device, successive sets of targets at respective successive instants, determining for a current set of current detected targets, a current histogram output, the current histogram output having for each current detected target of the current set, a current group of parameters stored in a memory including a confidence indicator, performing a matching operation between the current set of detected targets and previous sets of detected targets stored in the memory, and performing a filtering operation of at least one parameter of the current group of parameters of at least some of the current detected targets of the current set, on the basis of the result of the matching operation, the filtering operation being weighted on the basis of at least the confidence indicators of current and previous sets of detected targets.
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