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Patent Agency Ranking
公开(公告)号：US11165965B2
公开(公告)日：2021-11-02
申请号：US16709407
申请日：2019-12-10
Applicant: Axis AB
Inventor： Thomas Winzell , Hongping Zhao , Anthony Hawkins
Abstract: A method of assisting tilt angle adjustment of a thermal camera comprises arranging the thermal camera at an initial tilt angle, acquiring at least one thermal image by the thermal camera, determining, from the at least one thermal image, a series of sharpness indicators of image parts corresponding to vertically spaced parts of the camera view, identifying a maximum in the series of sharpness indicators, based on the identified maximum, determining a target sharpness indicator as a predetermined fraction of the identified maximum, during tilt angle adjustment, assisting by providing a target signal for indicating a target tilt angle of the thermal camera in which a sharpness indicator of a lower part of the camera's field of view equals the determined target sharpness indicator.
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公开(公告)号：US10699577B2
公开(公告)日：2020-06-30
申请号：US16567775
申请日：2019-09-11
Applicant: Axis AB
Inventor： Thomas Winzell , Anthony Hawkins
Abstract: A method and an alert discriminator for converting alerts in a video monitoring operation. The method comprises: triggering a candidate alert, in response to detecting, in a stream of thermal images of a scene, a stationary foreground object in the scene; evaluating an intensity of the detected stationary foreground object in relation to a background intensity; and in response to the intensity of the detected stationary foreground object being above the background intensity, converting the candidate alert to an actual alert.
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公开(公告)号：US20200082513A1
公开(公告)日：2020-03-12
申请号：US16563570
申请日：2019-09-06
Applicant: Axis AB
Inventor： Thomas Winzell , Jesper Bengtsson , Anthony Hawkins
Abstract: A method and a system for filtering thermal image data. The method comprises: capturing thermal image data by a thermal image detector; forming a signal distribution of intensity values; identifying a first part in the signal distribution of intensity values, the first part being a peak having an intensity width equal to or smaller than a predetermined intensity span being based on a resolution parameter of the thermal image detector; identifying a second part having an intensity width larger than the predetermined intensity span; determining an intensity range between the first part and the second part; and filtering, if the intensity range is larger than a predetermined minimum intensity range, the thermal image data by excluding thermal image data forming part of the first part.
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4.发明授权公开(公告)号：US12264970B2
公开(公告)日：2025-04-01
申请号：US17192927
申请日：2021-03-05
Applicant: Axis AB
Inventor： Thomas Winzell , Anthony Hawkins
Abstract: A method for temperature calibration and determination of a temperature in a scene. At each time point out of a plurality of time points in a first period of time, collecting an ambient temperature representing a temperature at a first part of the scene and collecting thermal image sensor signal values corresponding to the collected ambient temperatures and relating to the first part. Determine a calibration function based on the collected ambient temperatures and the thermal image sensor signal values corresponding to each of the collected ambient temperatures. In a second period of time, capturing a thermal image of the scene comprising thermal image sensor signal values relating to a second part of the scene and determine a temperature at the second part of the scene based on the calibration function and based on thermal image sensor signal values comprised in the thermal image.
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公开(公告)号：US20200098268A1
公开(公告)日：2020-03-26
申请号：US16567775
申请日：2019-09-11
Applicant: Axis AB
Inventor： Thomas Winzell , Anthony Hawkins
Abstract: A method and an alert discriminator for converting alerts in a video monitoring operation. The method comprises: triggering a candidate alert, in response to detecting, in a stream of thermal images of a scene, a stationary foreground object in the scene; evaluating an intensity of the detected stationary foreground object in relation to a background intensity; and in response to the intensity of the detected stationary foreground object being above the background intensity, converting the candidate alert to an actual alert.
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