公开(公告)号：US20230360235A1

公开(公告)日：2023-11-09

申请号：US18307503

申请日：2023-04-26

Applicant: Axis AB

Inventor： Niclas Danielsson ,  Axel Keskikangas ,  Håkan Ardö

IPC: G06T7/246 ,  G08B13/196

CPC classification number: G06T7/248 ,  G08B13/19602 ,  G06T2207/10016 ,  G06T2207/20081 ,  G06T2207/20076 ,  G06T2207/20084 ,  G06T2207/30232

Abstract: A plurality of feature vectors for moveable objects are received in a sequence of image frames captured during a first period. The feature vectors are received from a machine learning module trained to extract similar feature vectors in different image frames. An initial value is assigned to a first feature vector , or to a cluster of feature vectors identified in a second sequence of image frames preceding the first image frame. The indicator indicates whether vector is alive. For each subsequent image frame , the indicator is updated by: updating the value based on a similarity between the feature vector and the first feature vector or the cluster of feature vectors. If the value of the indicator indicates that the vector is alive, determining that there is a moveable object that is located in the captured scene at least the predetermined portion of the given period of time.

公开(公告)号：US20210337158A1

公开(公告)日：2021-10-28

申请号：US17301102

申请日：2021-03-25

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Song Yuan ,  John Rehn

IPC: H04N5/45 ,  H04N5/232 ,  H04N5/262 ,  H04N19/159 ,  H04N19/177 ,  H04N7/01 ,  H04N19/16 ,  H04N5/272

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.

公开(公告)号：US11770538B2

公开(公告)日：2023-09-26

申请号：US17398658

申请日：2021-08-10

Applicant: Axis AB

Inventor： Sebastian Hultqvist ,  Viktor Edpalm ,  Axel Keskikangas ,  Anton Eliasson

IPC: H04N19/137 ,  G06V20/52 ,  H04N19/114 ,  H04N19/159 ,  H04N19/52 ,  G06V20/40

CPC classification number: H04N19/137 ,  G06V20/40 ,  G06V20/52 ,  H04N19/114 ,  H04N19/159 ,  H04N19/52 ,  G06V20/44

Abstract: A method for encoding a video stream for the provision of prunable video data, comprising identifying, in the video stream, a first event-generating occurrence in one or more frames of the video stream, and, in an encoder, using the event-generating occurrence to initiate a hierarchical branch extending from a base-layer when encoding the video stream.

公开(公告)号：US10783646B2

公开(公告)日：2020-09-22

申请号：US16351042

申请日：2019-03-12

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Song Yuan

IPC: G06T7/246 ,  G06T3/40 ,  G06T5/00 ,  G06T5/50

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.

公开(公告)号：US20190149747A1

公开(公告)日：2019-05-16

申请号：US16186137

申请日：2018-11-09

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Song Yuan

IPC: H04N5/262 ,  G08B13/196 ,  G06T3/00 ,  G06T7/70 ,  G06T7/20 ,  G06T7/11 ,  G06T7/80 ,  H04N5/232

Abstract: A method for splitting a wide angle view of a scene into a plurality of display views is provided. The wide angle view is captured by a wide angle lens camera. The method comprises detecting, over time, objects in the scene; determining positions of the detected objects; determining one or more areas of interest within the scene based on the determined positions of the objects; and determining splitting boundaries for the plurality of display views in the wide angle view such that the splitting boundaries avoids the one or more areas of interest. A monitoring camera having a wide angle lens is also provided.

公开(公告)号：US11995477B2

公开(公告)日：2024-05-28

申请号：US17877066

申请日：2022-07-29

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Georgios Efstathiou

IPC: G06F9/50

CPC classification number: G06F9/5044 ,  G06F9/505 ,  G06F9/5027

Abstract: A method for evaluating an updated analytical procedure in a monitoring system, comprising a plurality of monitoring device arranged to monitor similar environments, is provided. The method comprises identifying available processing resources, selecting a first monitoring device for which available processing resources have been identified, selecting a second monitoring device, acquiring monitoring data by the second monitoring device, and performing a current analytical procedure on the monitoring data. The method further comprises sending the monitoring data to the first monitoring device, performing, in the first monitoring device, an updated analytical procedure on the monitoring data, and evaluating the updated analytical procedure based on the outcome of the current analytical procedure and the updated analytical procedure.

公开(公告)号：US11934164B2

公开(公告)日：2024-03-19

申请号：US17336992

申请日：2021-06-02

Applicant: Axis AB

Inventor： Sebastian Hultqvist ,  Axel Keskikangas

IPC: G05B19/042 ,  H04L9/32

CPC classification number: G05B19/042 ,  H04L9/3271 ,  G05B2219/23193

Abstract: A method, implemented in a device, for remote resetting of the device to factory default settings, the device comprising an electric circuit adapted to carry out the factory default reset and a secure processing and storage environment, SPSE, the method comprising: receiving, at the SPSE, a request to reset the device to factory default settings and a challenge associated with the request, wherein the request and the challenge are received via a network; initiating, by the SPSE, a reset to factory default settings of the device by communicating with the electric circuit via a communication channel; and sending, by the SPSE, a confirmation via the network, wherein the confirmation includes a response to the challenge as produced by the SPSE and an attestation report, the attestation report being a declaration by the SPSE that the reset to factory default settings is initiated or carried out.

公开(公告)号：US11770545B2

公开(公告)日：2023-09-26

申请号：US17398665

申请日：2021-08-10

Applicant: Axis AB

Inventor： Sebastian Hultqvist ,  Viktor Edpalm ,  Axel Keskikangas ,  Anton Eliasson

IPC: H04N19/30 ,  H04N23/80 ,  H04N19/119 ,  H04N19/137 ,  H04N19/142 ,  G06F16/71 ,  G06F21/64 ,  H04N5/91

CPC classification number: H04N19/30 ,  G06F16/71 ,  G06F21/64 ,  H04N5/91 ,  H04N19/119 ,  H04N19/137 ,  H04N19/142 ,  H04N23/80

Abstract: A method of encoding a video stream for the provision of prunable video data, comprising: receiving, in an encoder, a video stream in which each image frame of the video stream is divided into a number of subviews, providing each subview with an assigned category based on a content of the particular subview, monitoring the evolution of category assigned for each subview, and encoding the video stream using a hierarchical P-frame encoding structure, in such manner that each change in category for a subview starts a new hierarchical P-frame structure.

公开(公告)号：US10778909B2

公开(公告)日：2020-09-15

申请号：US16186137

申请日：2018-11-09

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Song Yuan

IPC: H04N5/262 ,  G08B13/196 ,  G06T3/00 ,  G06T7/70 ,  G06T7/11 ,  G06T7/80 ,  H04N5/232 ,  G06T7/20 ,  H04N7/18 ,  G06K9/00

Abstract: A method for splitting a wide angle view of a scene into a plurality of display views is provided. The wide angle view is captured by a wide angle lens camera. The method comprises detecting, over time, objects in the scene; determining positions of the detected objects; determining one or more areas of interest within the scene based on the determined positions of the objects; and determining splitting boundaries for the plurality of display views in the wide angle view such that the splitting boundaries avoids the one or more areas of interest. A monitoring camera having a wide angle lens is also provided.

公开(公告)号：US12277219B2

公开(公告)日：2025-04-15

申请号：US17968329

申请日：2022-10-18

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Martin Nilsson

IPC: G06F21/55 ,  G06F21/60

Abstract: Upon detecting an event indicating enabling of security sensitive functionality of an electronic device, a value previously unknown to the electronic device is obtained and the current content of the data storage to a new current content of the data storage is updated according to an updating function based on the current content of the data storage and the value, wherein, without privileged access, the current content of the data storage can only be updated using the updating function. The value is further obtained in a management module and an expected new current content of the data storage is determined in the management module according to the updating function based on known original content of the data storage and the value. Upon determining that the new current content of the data storage differs from the expected new current content of the data storage, a validation module generates a security notification.