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    PTZ masking control
    1.
    发明授权
    PTZ masking control 有权

    公开(公告)号：US12283027B2

    公开(公告)日：2025-04-22

    申请号：US18302362

    申请日：2023-04-18

    Applicant: Axis AB

    Inventor： Song Yuan

    IPC: G06T5/70 ,  G06T5/75 ,  G08B13/196 ,  H04N7/18 ,  H04N23/695

    Abstract: A method of generating an output video stream is provided, including receiving a first input video stream from at least one first camera capturing a scene, receiving a second input video stream from a second camera only partially capturing the scene, and generating an output video stream from the first input video stream, including, in response to determining that a particular area of the output video stream depicts a part of the scene depicted in the second input video stream, refraining from, or at least reducing a level of, a masking of the particular area of the output video stream. A corresponding device, camera monitoring system, computer program and computer program product are also provided.

    Method and system for defining an outline of a region in an image having distorted lines
    3.
    发明授权
    Method and system for defining an outline of a region in an image having distorted lines 有权

    公开(公告)号：US12205235B2

    公开(公告)日：2025-01-21

    申请号：US18355784

    申请日：2023-07-20

    Applicant: Axis AB

    Inventor： Song Yuan

    IPC: G06T3/047 ,  G06T11/20 ,  G06T15/00

    Abstract: A method for defining an outline of a region in an image having distorted lines comprises displaying a first image version having distorted lines, wherein lines in a first image portion of the first version have a reduced distortion, receiving user input defining a first outline portion of the outline of region in the first version, wherein the first outline portion includes one or more lines in the first image portion of the first version, displaying a further version of the image having distorted lines, wherein lines in a further image portion of the further version have a reduced distortion, and receiving user input defining a further outline portion of the outline of the region in the further, wherein the further outline portion includes one or more lines in the further portion of the further version.

    Method and device for image analysis
    4.
    发明授权
    Method and device for image analysis 有权

    公开(公告)号：US11514582B2

    公开(公告)日：2022-11-29

    申请号：US17026321

    申请日：2020-09-21

    Applicant: Axis AB

    Inventor： Stefan Lundberg ,  Song Yuan

    IPC: G06K9/00 ,  G06T7/20 ,  G06T7/194 ,  G06T7/70 ,  G06T5/20

    Abstract: A method includes defining a background model of the video sequence by applying a first algorithm, the background model defining whether that spatial area belongs to a background or a foreground in the video sequence, wherein a detected significant change in image data in a spatial area in an image frame relative image data in said spatial area in a preceding image frame is indicative of said spatial area belonging to the foreground; indicating that an idle area of the defined foreground areas is to be transitioned from foreground to background; and determining whether the idle area is to be transitioned by applying a second algorithm to image data of an image frame of the video sequence, the image data at least partly corresponding to the idle area; wherein if the idle area is not to be transitioned, maintaining the idle area as a foreground area in the background model.

    Method, device, camera and software for performing electronic image stabilization of a high dynamic range image
    5.
    发明授权
    Method, device, camera and software for performing electronic image stabilization of a high dynamic range image 有权

    公开(公告)号：US11223769B2

    公开(公告)日：2022-01-11

    申请号：US17203828

    申请日：2021-03-17

    Applicant: Axis AB

    Inventor： Song Yuan ,  Johan Förberg

    IPC: H04N5/232

    Abstract: A system and method for electronic image stabilization for a high dynamic range image captured by a rolling shutter image sensor and more specifically to an algorithm configured to perform electronic image stabilization on the high dynamic range image, by, for each specific block of pixels among the blocks of pixels in the high dynamic range image, the specific block of pixels spatially corresponding to a pixel region of the rolling shutter image sensor, determining whether the specific block of pixels is copied from pixel data of the first image or the second image, or is a blend of pixel data from both the first image and the second image, and use motion data measured when capturing the first and second images for performing electronic image stabilization based on the origin of the specific block of pixels.

    METHOD, DEVICE, AND CAMERA FOR BLENDING A FIRST AND A SECOND IMAGE HAVING OVERLAPPING FIELDS OF VIEW
    7.
    发明申请
    METHOD, DEVICE, AND CAMERA FOR BLENDING A FIRST AND A SECOND IMAGE HAVING OVERLAPPING FIELDS OF VIEW 审中-公开

    公开(公告)号：US20190147564A1

    公开(公告)日：2019-05-16

    申请号：US16186188

    申请日：2018-11-09

    Applicant: Axis AB

    Inventor： Song Yuan ,  Hampus Linse

    IPC: G06T3/40

    Abstract: There is provided a method for blending a first image and a second image having overlapping fields of view. The first and the second images are blended in a blending region. A width of the blending region is selected based on similarity between a first set of camera parameters used when capturing the first image and a second set of camera parameters used when capturing the second image such that the width decreases with increasing similarity.

    Masking of objects in a video stream
    9.
    发明授权
    Masking of objects in a video stream 有权

    公开(公告)号：US12254751B2

    公开(公告)日：2025-03-18

    申请号：US17831499

    申请日：2022-06-03

    Applicant: Axis AB

    Inventor： Tor Nilsson ,  Song Yuan

    IPC: G08B13/196 ,  G06T7/194 ,  G06V20/52 ,  G11B27/031

    Abstract: A method for masking of objects in a video stream, the method comprising: acquiring a video stream; detecting an object in the video stream; determining whether the detected object belongs to a foreground of the video stream indicative of moving objects or to a background of the video stream indicative of static objects; classifying the detected object to be of a specific type using a first classifier if the detected object is determined to belong to the foreground, and using a second classifier if the detected object is determined to belong to the background, the first classifier being different from the second classifier, and if the detected object is classified as being of the specific type of object, masking the object in the video stream.

    Static privacy masking
    10.
    发明授权
    Static privacy masking 有权

    公开(公告)号：US12118731B2

    公开(公告)日：2024-10-15

    申请号：US18172411

    申请日：2023-02-22

    Applicant: Axis AB

    Inventor： Ludvig Hassbring ,  Jessica Nilsson ,  Song Yuan

    IPC: G06T7/20 ,  G06F21/62 ,  G06V20/52

    CPC classification number: G06T7/20 ,  G06F21/6245 ,  G06V20/52 ,  G06T2207/10016

    Abstract: A method of masking in an output image stream includes receiving an input image stream capturing a scene, processing the input image stream to generate the output image stream, including using a detector to detect objects in the scene and a tracker to track objects in the scene based on information provided by the detector, and further including to generate a particular output image of the output image stream by checking whether there exists a particular area in the scene in which an evaluation of a historical performance of the detector and/or tracker fulfills at least one condition, and to, if confirming that such a particular area exists, mask the particular area of the scene in the particular output image. A corresponding device, computer program, and computer program product are also provided.

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