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公开(公告)号：US11670074B2
公开(公告)日：2023-06-06
申请号：US17679114
申请日：2022-02-24
Applicant: Axis AB
Inventor： Björn Ardö
IPC: G06V10/60 , G06T7/571 , G06T3/00 , H04N23/52 , H04N23/80 , H04N23/695 , H04N23/959
CPC classification number: G06V10/60 , G06T3/0056 , G06T7/571 , H04N23/52 , H04N23/695 , H04N23/80 , H04N23/959 , G06T2207/10144 , G06T2207/10148 , G06T2207/30232 , G06T2207/30244
Abstract: A method for determining whether or not a transparent protective cover of a video camera comprising a lens-based optical imaging system is partly covered by a foreign object is disclosed. The method comprises:
obtaining (402) a first captured image frame captured by the video camera with a first depth of field;
obtaining (404) a second captured image frame captured by the video camera with a second depth of field which differs from the first depth of field; and
determining (406) whether or not the protective cover is partly covered by the foreign object by analysing whether or not the first and second captured image frames are affected by presence of the foreign object on the protective cover such that the difference between the first depth of field and the second depth of field results in a difference in a luminance pattern of corresponding pixels of a first image frame and a second image frame. The first image frame is based on the first captured image frame and the second image frame is based on the second captured image frame.-
2.发明申请公开(公告)号：US20190340731A1
公开(公告)日：2019-11-07
申请号：US16393916
申请日：2019-04-24
Applicant: Axis AB
Inventor： Johan Nyström , Song Yuan , Björn Ardö
Abstract: Methods and devices for protecting personal privacy in captured image data by controlling privacy masking of an image, where the degree of blurring to be applied to a privacy area of the image depends on a threshold distance from the image capturing device, and the spatial resolution of content of the scene at this distance in the image.
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公开(公告)号：US20190215439A9
公开(公告)日：2019-07-11
申请号：US16009693
申请日：2018-06-15
Applicant: Axis AB
Inventor： Björn Ardö , Sebastian Hultqvist
CPC classification number: H04N5/23212 , G02B7/28 , H04N5/2257 , H04N5/232123 , H04N5/23245 , H04N5/23299 , H04N7/183
Abstract: A method of focusing a camera with a movable field of view includes obtaining a current field of view setting corresponding to a current field of view of the camera, retrieving, based on the obtained current field of view setting, focusing data pertaining to the focusing method that was previously used to focus the camera for a previous field of view, at least partly overlapping the obtained current field of view, by accessing a focusing assisting database comprising a plurality of camera focusing entries, wherein each camera focusing entry includes a respective previous field of view setting, corresponding to a respective previous field of view and thereto associated focusing data pertaining to the focusing method that was previously used to focus the camera for the respective previous field of view.
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公开(公告)号：US20180376052A1
公开(公告)日：2018-12-27
申请号：US16009693
申请日：2018-06-15
Applicant: Axis AB
Inventor： Björn Ardö , Sebastian Hultqvist
CPC classification number: H04N5/23212 , G02B7/28 , H04N5/2257 , H04N5/232123 , H04N5/23245 , H04N5/23299 , H04N7/183
Abstract: A method of focusing a camera with a movable field of view includes obtaining a current field of view setting corresponding to a current field of view of the camera, retrieving, based on the obtained current field of view setting, focusing data pertaining to the focusing method that was previously used to focus the camera for a previous field of view, at least partly overlapping the obtained current field of view, by accessing a focusing assisting database comprising a plurality of camera focusing entries, wherein each camera focusing entry includes a respective previous field of view setting, corresponding to a respective previous field of view and thereto associated focusing data pertaining to the focusing method that was previously used to focus the camera for the respective previous field of view.
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公开(公告)号：US12148216B2
公开(公告)日：2024-11-19
申请号：US17669403
申请日：2022-02-11
Applicant: Axis AB
Inventor： Björn Ardö
Abstract: The present disclosure relates to a method performed by a monitoring camera (100) for handling a first and a second video stream (201a, 201b). The monitoring camera (100) obtains a first video stream (201a) from a first image sensor (103a) and a second video stream (201b) from a second image sensor (103b). A field of view of the first video stream (201a) partly overlaps with the second video stream (201b). The monitoring camera (100) identifies a moving object (205) in the overlap area (203). The monitoring camera (100) divides the moving object (205) into a plurality of sub objects (210). The monitoring camera (100) performs a hard handover of the sub objects (210) from the first to the second video stream (201a, 201b) when the sub object (210) is within the overlap area (203) and when a point of the sub object (210) passes a border (208).
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Patent Agency Ranking
6.发明授权公开(公告)号：US10972659B2
公开(公告)日：2021-04-06
申请号：US16546926
申请日：2019-08-21
Applicant: Axis AB
Inventor： Björn Ardö , Stefan Lundberg , Stefan Sandström
IPC: H04N5/232 , H04N5/225 , H04N19/46 , H04N5/04 , H04N19/136 , H04N5/262 , H04N19/174 , H04N5/247 , H04N19/14 , H04N19/115 , H04N19/184 , H04N19/176 , H04N21/236 , H04N5/265 , H04N7/18 , H04N5/235 , H04N19/436
Abstract: A method, device, and computer program product related to the field of image encoding. In particular, the method, device, and computer program product uses multiple image sensors and multiple encoders for outputting a single encoded image, where image data captured by a first image sensor is added to the encoded image as a first tile or slice, and where image data captured by a second image sensor is added to the encoded image as a second tile or slice.
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公开(公告)号：US10373035B2
公开(公告)日：2019-08-06
申请号：US15157096
申请日：2016-05-17
Applicant: Axis AB
Inventor： Markus Skans , Björn Ardö , Igor Gurovski
Abstract: A method and system for determining a position of a camera is disclosed. The method and system includes determining and registering geographical coordinates of a mobile device in the mobile device itself, presenting on a display of the mobile device a pattern representing the geographical coordinates of the mobile device, capturing by the camera an image of the display of the mobile device when presenting the geographical coordinates, translating in the camera the pattern in the captured image of the display of the mobile device into geographical coordinates, and determining in the camera the position of the camera based on the geographical coordinates translated from the pattern in the captured image.
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公开(公告)号：US20180310022A1
公开(公告)日：2018-10-25
申请号：US15961426
申请日：2018-04-24
Applicant: Axis AB
Inventor： Viktor Edpalm , Björn Ardö
IPC: H04N19/58 , H04N19/176
CPC classification number: H04N19/58 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/527 , H04N19/59
Abstract: A method and an apparatus for forming a video stream based on images of a scene captured by a camera. The method comprises: encoding image frames based on images captured by the camera, forming an encoded portion; determining a length of motion for a sample image frame, the length of motion being indicative of the amount of relative motion between the camera and the scene in the sample image frame relative a temporally preceding image frame; setting a motion length threshold based on a motion vector search range of the encoder; comparing the determined length of motion with the set motion length threshold; based on the outcome of the comparison, adjusting a chosen temporal frame distance of at least an adjustment portion (PA) of the video stream, wherein the adjustment portion is comprised in the encoded portion or in a temporally later encoded portion.
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公开(公告)号：US09712747B2
公开(公告)日：2017-07-18
申请号：US15132843
申请日：2016-04-19
Applicant: AXIS AB
Inventor： Björn Ardö
CPC classification number: H04N5/23267 , G06T2210/22 , H04N5/23248 , H04N5/23258 , H04N5/23274 , H04N5/2328 , H04N5/3572 , H04N5/77
Abstract: The present invention relates to a method for enabling an image stabilized video. The method comprises providing data defining a vignetting effect for digital image frames captured by a video camera; determining a dislocation value for a digital image frame captured by the video camera; determining, based on the dislocation value, a region of the digital image frame to be displayed in the image stabilized video; applying a vignetting removal process at least on pixels of the digital image frame corresponding to the region to be displayed in the image stabilized video, wherein said applying being based on the data defining the vignetting effect; and reintroducing vignetting on the region of the digital image frame to be displayed in the video based on the data defining the vignetting effect and the dislocation value.
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10.发明授权公开(公告)号：US12125273B2
公开(公告)日：2024-10-22
申请号：US17510407
申请日：2021-10-26
Applicant: Axis AB
Inventor： Björn Ardö , Anton Jakobsson
CPC classification number: G06V10/95 , G06V10/147 , G06V10/25 , G06V10/462
Abstract: A method (100), a device (600;700) and a system (800) for processing image data representing a scene for extracting features related to objects in the scene using a convolutional neural network are disclosed. Two or more portions of the image data representing a respective one of two or more portions of the scene are processed (S110), by means of a respective one of two or more circuitries, through a first number of layers of the convolutional neural network to form two or more outputs, wherein the two or more portions of the scene are partially overlapping. The two or more outputs are combined (S120) to form a combined output, and the combined output is processed (S130) through a second number of layers of the convolutional neural network by means of one of the two or more circuitries for extracting features related to objects in the scene.
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