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公开(公告)号：US12120421B2
公开(公告)日：2024-10-15
申请号：US17570774
申请日：2022-01-07
Applicant: Axis AB
Inventor： Axel Keskikangas , Viktor Edpalm , Mattias Pettersson
IPC: H04N23/65 , G06T5/00 , G06V20/40 , G11B20/10 , G11B27/028
CPC classification number: H04N23/651 , G06T5/00 , G06V20/44 , G11B20/10527 , G11B27/028 , G11B2020/10712
Abstract: A method of providing an event-initiated video sequence, comprises a pre-event video sequence and a post-event video sequence. The pre-event image frames are stored in a non-processed format until such time that an event is taking place. By postponing the image processing of the pre-event video sequence, power savings are accomplished.
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12.发明授权公开(公告)号：US11831789B2
公开(公告)日：2023-11-28
申请号：US17530721
申请日：2021-11-19
Applicant: Axis AB
Inventor： Axel Keskikangas , Johnny Wahnström , Ola Mårtensson , Pernilla Allansson
IPC: H04L9/32
CPC classification number: H04L9/3268 , H04L9/3271 , H04L9/321
Abstract: Systems and methods of managing a certificate associated with a component located at a remote location from a certificate authority system are provided. A certificate request is received, wherein the certificate request comprises a key associated with the component. A certificate is generated corresponding to the key received in the certificate request, and a validity status of the certificate is caused to be set to invalid. The certificate is provided to the component and it is determined whether the component matches the certificate. Upon determining that the component matches the certificate, the validity status is caused to be set to valid.
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公开(公告)号：US11704435B2
公开(公告)日：2023-07-18
申请号：US17313137
申请日：2021-05-06
Applicant: Axis AB
Inventor： Axel Keskikangas , David Hjerpe
IPC: G06F21/62 , G08B13/196
CPC classification number: G06F21/6245 , G06F21/6209 , G08B13/19671 , G08B13/19686 , G06F2221/2113 , G06F2221/2141
Abstract: A method for partially unmasking an object in a video stream comprises: displaying a first video stream in which objects are covered by privacy masks; receiving user input regarding a selection of an object being covered by a privacy mask, wherein the object has a first portion being associated with a first privacy level and a second portion being associated with a second, higher, privacy level; checking that a permission associated with the user input grants access to video data depicting object portions being associated with the first privacy level; giving access to video data depicting the first portion of the object; and displaying a second video stream which differs from the first video stream in that it includes the video data depicting the first portion of the object, while the second portion of the object is still covered by a privacy mask.
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公开(公告)号：US11457179B2
公开(公告)日：2022-09-27
申请号：US16552830
申请日：2019-08-27
Applicant: Axis AB
Inventor： Mazdak Farzone , Axel Keskikangas
Abstract: A video capturing device configured to capture video data, the image capturing device comprising: an image processing pipeline configured to generate a video stream from the captured video data; an encryption key activating module configured to, upon request, activate an encryption key and deactivate any previously activated encryption key used for encrypting the video stream, such that only one encryption key is activated to be used for encryption of the video stream at each instance in time; an encryption scheduler module configured to, at a predetermined time interval, instruct the encryption key activating module to activate an encryption key; an event handling module configured to, as a response to receiving indications of a detected event, instruct the encryption key activating module to activate an encryption key; an encryption module configured to encrypt the video stream using the one activated encryption key.
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Patent Agency Ranking
公开(公告)号：US12136224B2
公开(公告)日：2024-11-05
申请号：US17864400
申请日：2022-07-14
Applicant: Axis AB
Inventor： Niclas Danielsson , Xing Danielsson Fan , Axel Keskikangas
Abstract: A method of generating a segmentation outcome which indicates individual instances of one or more object classes for an image in a sequence of images is disclosed. The method comprises: determining (501) a coherent region of the image; processing (502) the image to determine a tensor representing pixel-specific confidence scores; generating (503) a series of temporary segmentation masks for the coherent region, wherein each temporary segmentation mask is generated by interpreting the tensor with respect to a single object class using a different temporary confidence score threshold; evaluating (504) the series of temporary segmentation masks to determine if an object mask condition is met; depending on the outcome of the evaluation, setting (505) the temporary confidence score threshold as a final confidence score threshold for the pixels of the temporary segmentation mask, or setting (505) a default confidence score threshold as a final confidence score threshold for the coherent region; and generating (506) a final segmentation outcome for the image.
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公开(公告)号：US11539909B2
公开(公告)日：2022-12-27
申请号：US17301102
申请日：2021-03-25
Applicant: Axis AB
Inventor： Axel Keskikangas , Song Yuan , John Rehn
IPC: H04N5/45 , H04N19/159 , H04N19/16 , H04N19/177 , H04N5/232 , H04N5/262 , H04N5/272 , H04N7/01
Abstract: Methods and apparatus, including computer program products, for controlling a Pan-Tilt-Zoom (PTZ) camera. A video stream is provided by the PTZ camera. The video stream includes a main image and a smaller picture-in-picture overlay. The main image and the overlay show the same view. The overlay has both a higher frame rate and a lower resolution compared to the main image. A movement control instruction is received, by the PTZ camera, in response to an evaluation of at least one of the main image and the overlay.
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公开(公告)号：US10593047B2
公开(公告)日：2020-03-17
申请号：US16224270
申请日：2018-12-18
Applicant: Axis AB
Inventor： Viktor Edpalm , Axel Keskikangas
Abstract: A method for setting a motion trigger level is used in detection of motion in a video stream depicting a scene which includes receiving data pertaining to a video stream depicting the scene; dividing the scene into a plurality of specific portions; wherein each image frame of the video stream comprises multiple blocks of pixels, wherein each specific portion of the scene is associated with one or more block of pixels; and for each specific portion of the scene: evaluating, over time, statistical features of bitrate associated with an encoding of block of pixels pertaining to the specific portion of the scene; determining a motion base level based on the evaluated statistical features of bitrate associated with the encoding of block of pixels pertaining to the specific portion of the scene; and setting a motion trigger level based on the motion base level.
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公开(公告)号：US20190340771A1
公开(公告)日：2019-11-07
申请号：US16351042
申请日：2019-03-12
Applicant: Axis AB
Inventor： Axel Keskikangas , Song Yuan
Abstract: A method for detecting motion in a video sequence comprising distorted image frames is provided. The method comprises determining (101) a spatial resolution distribution for the distorted image frames; determining (102) a motion detection sensitivity map for the distorted image frames, the motion detection sensitivity map comprising areas having different motion detection sensitivity levels, wherein the motion detection sensitivity map is determined based on the spatial resolution distribution; and detecting (103) motion in the video sequence based on the motion detection sensitivity map. A motion detecting component and a camera including such a component is also disclosed.
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公开(公告)号：US20190197702A1
公开(公告)日：2019-06-27
申请号：US16224270
申请日：2018-12-18
Applicant: Axis AB
Inventor： Viktor Edpalm , Axel Keskikangas
CPC classification number: G06T7/246 , G06T7/20 , G06T2207/10016 , G06T2207/20021 , G06T2207/30232 , H04L65/607
Abstract: A method for setting a motion trigger level is used in detection of motion in a video stream depicting a scene which includes receiving data pertaining to a video stream depicting the scene; dividing the scene into a plurality of specific portions; wherein each image frame of the video stream comprises multiple blocks of pixels, wherein each specific portion of the scene is associated with one or more block of pixels; and for each specific portion of the scene: evaluating, over time, statistical features of bitrate associated with an encoding of block of pixels pertaining to the specific portion of the scene; determining a motion base level based on the evaluated statistical features of bitrate associated with the encoding of block of pixels pertaining to the specific portion of the scene; and setting a motion trigger level based on the motion base level.
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