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公开(公告)号：US11967002B2
公开(公告)日：2024-04-23
申请号：US17349939
申请日：2021-06-17
Applicant: Axis AB
Inventor： Carl-Axel Alm , Håkan Ardö , Raphael Teller , Song Yuan , Tim Borglund
CPC classification number: G06T11/001 , G06T5/40 , G06T5/50
Abstract: A method for anonymizing a digital colour image comprising obtaining the digital colour image, and applying a linear random function to a respective colour vector representing colour components of a respective pixel of the digital colour image to obtain a monochrome image. The linear random function varies over the pixels of the digital colour image, and is further dependent on at least one random parameter.
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公开(公告)号：US11272119B2
公开(公告)日：2022-03-08
申请号：US17086575
申请日：2020-11-02
Applicant: Axis AB
Inventor： Song Yuan , Martin Santesson
Abstract: High dynamic range imaging includes first image data captured using a first image sensor and a first exposure time, using a rolling shutter such that different lines within the first image data are captured at different times. Two or more instances of second image data are captured using second image sensors and second exposure times that are shorter than the first exposure time. The second image data are captured using a rolling shutter, and overlap at least in part with the first image data. A line of the first image data has a corresponding line in each instance of second image data, and the corresponding instances of second image data are captured at different second capture times. For a line in the first image data, the corresponding line from the instance of second image data is selected to be merged with the line in the first image data.
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公开(公告)号：US20210092387A1
公开(公告)日：2021-03-25
申请号：US16947648
申请日：2020-08-11
Applicant: Axis AB
Inventor： Viktor Edpalm , Song Yuan
IPC: H04N19/132 , H04N7/18 , G06K9/00 , G06T5/00 , H04N19/46 , H04N19/176
Abstract: Methods and apparatus, including computer program products, implementing and using techniques providing privacy masks on a video stream. In a video received from a monitoring camera, at least one image region is selected, to which region a privacy mask should be applied. For any image frame in the video that contains the at least one image region, a flag is set to indicate a non-displayed image frame. A forward-predicted image frame referencing the non-displayed image frame is inserted, wherein coding units representing the at least one image region in the forward-predicted image frame collectively provide the privacy mask by obfuscating the at least one image region.
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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.
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公开(公告)号：US20200035075A1
公开(公告)日：2020-01-30
申请号：US16525096
申请日：2019-07-29
Applicant: Axis AB
Inventor： Johan Stening , Hampus Linse , Song Yuan
IPC: G08B13/196 , H04N5/232
Abstract: A method and a camera system for stitching video data from two image sensors arranged to each capture video data of overlapping camera views comprises detecting motion in an area in the camera views corresponding to the overlapping camera views,determining an activity distance, being the distance from a position at the location of the two image sensors to an activity position including the detected motion, positioning in a three-dimensional coordinate system a predefined projection surface at a position having a distance between the position at the location of the image sensors and a position of the projection of the activity onto the projection surface that corresponds to the determined activity distance, projecting the video data from each of the image sensors onto the predefined projection surface that have been positioned at the activity distance, and outputting a two-dimensional video corresponding to the projection onto the projection surface.
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Patent Agency Ranking
公开(公告)号：US20190149714A1
公开(公告)日：2019-05-16
申请号：US16178595
申请日：2018-11-02
Applicant: Axis AB
Inventor： Song Yuan
Abstract: The present invention relates to allowing control of a monitoring camera, typically outside of what is supported by a video management system, to which the camera is connected. The camera overlays a pattern on the video stream representing a link to an action in a control interface for controlling the camera and an operator uses an operator controlled device, such as a mobile phone, to scan the pattern and perform the action to control the camera.
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公开(公告)号：US10261779B2
公开(公告)日：2019-04-16
申请号：US15448176
申请日：2017-03-02
Applicant: Axis AB
Inventor： Song Yuan
Abstract: There is provided a device (100) having hardware (102) and a first, upgradable, firmware (106) for controlling the hardware. The device further has a hypervisor (104) which links the first firmware to the hardware so as to control access of the first firmware to the hardware. In preparation for an upgrade of the first firmware, the hypervisor is configured to deny access of the first firmware to the hardware, access a second firmware, and control the hardware by the second firmware.
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公开(公告)号：US20190104317A1
公开(公告)日：2019-04-04
申请号：US16150226
申请日：2018-10-02
Applicant: Axis AB
Inventor： Viktor Edpalm , Song Yuan
IPC: H04N19/167 , H04N19/146 , H04N19/115 , H04N19/114
Abstract: A method and a video encoding system for encoding a video stream include video data representing sequentially related image frames, wherein the image frames include a predefined first subarea and a predefined second subarea. The method comprises defining a first bitrate budget, defining a second bitrate budget, encoding the video stream including applying the first bitrate budget to video data of the first subarea and applying the second bitrate budget to video data of the second subarea. The video encoding system comprises an image processor for processing the image stream, a memory including values defining a first bitrate budget and a second bitrate budget, respectively, and a first subarea and a second subarea of the image frames of the image stream and an encoder arranged to encode the image stream, the encoding including applying the first bitrate budget to video data of the first subarea and applying the second bitrate budget to video data of the second subarea.
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19.发明申请公开(公告)号：US20180338084A1
公开(公告)日：2018-11-22
申请号：US15980392
申请日：2018-05-15
Applicant: Axis AB
Inventor： Viktor Edpalm , Song Yuan , Alexandre Martins
Abstract: A system comprising a video camera and a client device and a method performed therein. The video camera captures a plurality of images concurrently using a plurality of image sensors having partly overlapping fields of views. Overlapping portions of the images are identified, and the images are joined to generate a panorama image. When joining the images, image data is included from only one of the images in overlapping portions, and image data from the other images in the overlapping portions is ignored. The panorama image and the ignored image data is encoded and transmitted to the client device in an encoded video stream. The client device decodes the video stream and, if the client device is customized, it updates the panorama image in portions corresponding to overlapping portions of the plurality of images using the image data that was ignored by the video camera when generating the panorama image.
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公开(公告)号：US09756274B2
公开(公告)日：2017-09-05
申请号：US14956519
申请日：2015-12-02
Applicant: Axis AB
Inventor： Bjorn Ardo , Song Yuan
CPC classification number: H04N5/44504 , G06T7/20 , G06T13/80 , G06T2207/10016 , H04N5/265 , H04N21/4312
Abstract: The present invention relates generally to video communication systems, and more specifically to a method and device for determining a degree of animation of a graphical overlay for a video stream based on a degree of movement in the video stream.
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