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11.发明公开公开(公告)号：US20230177661A1
公开(公告)日：2023-06-08
申请号：US17993243
申请日：2022-11-23
Applicant: Axis AB
Inventor： Joakim ERICSON , Song YUAN
CPC classification number: G06T5/20 , G06T5/003 , H04N23/80 , G06T5/002 , G06T2207/10016 , G06T2207/20004 , G06T2207/30232
Abstract: The present disclosure generally relates to the field of camera surveillance, and in particular to a method and control unit for controlling a bitrate of a video stream captured with an image acquisition device.
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12.发明公开公开(公告)号：US20230171409A1
公开(公告)日：2023-06-01
申请号：US17980156
申请日：2022-11-03
Applicant: Axis AB
Inventor： Viktor EDPALM , Song YUAN , Toivo HENNINGSSON , Johan PALMAEUS
IPC: H04N19/159 , G06T7/11 , G06T9/00 , G06V10/25
CPC classification number: H04N19/159 , G06T7/11 , G06T9/00 , G06V10/25
Abstract: A and method encode a view area within a current image frame of a video into an encoded video area frame. The view area is a respective subarea of each image frame, each image frame comprising first and second image portions, and between previous and current image frames, the view area moves across a boundary between the first and second image portions. First and second encoders are encode image data of the first and second image portions, respectively. First, second and third portions of the view area are identified based on their respective location in the previous and current image frames. Image data of the first and third portions are inter-coded as first and third encoded slices/tiles. Image data of the second portion of the view area in the current image frame are intra-coded as a second encoded slice/tile. The encoded slices/tiles are merged into the encoded video area frame.
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公开(公告)号：US20220138468A1
公开(公告)日：2022-05-05
申请号：US17498764
申请日：2021-10-12
Applicant: Axis AB
Inventor： Viktor EDPALM , Song YUAN , Raphael TELLER
IPC: G06K9/00 , H04N19/85 , H04N19/105 , H04N19/46 , H04N19/172
Abstract: A method for controlling video processing. A stream of images emanating from an image sensor is received. The contents of an image in the stream is evaluated. A part of the image stream, which part is antecedent the image being evaluated, is forwarded to a video encoder. Until the evaluation is complete, one or more empty frames are added at the end of an encoded image stream corresponding to the forwarded image stream.
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公开(公告)号：US20170269927A1
公开(公告)日：2017-09-21
申请号：US15448176
申请日：2017-03-02
Applicant: Axis AB
Inventor： Song YUAN
CPC classification number: G06F8/656 , G06F8/654 , G06F9/4411 , G06F9/45541 , G06F9/45558 , G06F21/572 , G06F2009/45579 , G06F2009/45583
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：US20250133226A1
公开(公告)日：2025-04-24
申请号：US18918422
申请日：2024-10-17
Applicant: Axis AB
Inventor： Song YUAN , Viktor EDPALM
IPC: H04N19/33 , H04N19/105 , H04N19/167 , H04N19/172
Abstract: A method for encoding a video stream includes obtaining images of a scene captured by a camera at a first resolution; identifying regions of interest (ROIs) in an image; adding, as part of an encoded video stream, a first video frame encoding at least part of the image at a second resolution lower than the first resolution; adding a second video frame marked as a no-display frame, and being an inter-frame referencing the first video frame with motion vectors for upscaling of the ROIs; adding a third video frame encoding the ROIs at a third resolution higher than the second resolution, and being an inter-frame referencing the second video frame.
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Patent Agency Ranking
公开(公告)号：US20240404014A1
公开(公告)日：2024-12-05
申请号：US18678551
申请日：2024-05-30
Applicant: Axis AB
Inventor： Ludvig HASSBRING , Song YUAN
IPC: G06T5/50 , G06T7/194 , G06T7/20 , G06V10/762 , H04N5/272
Abstract: The present disclosure relates to a method of background modelling for a video stream acquired by a camera having movement capabilities. The method comprises: acquiring a video stream; repeatedly updating a background model for the video stream by analyzing changes in the sequence of image frames and categorizing image areas in the image frames which do not change over time as background; detecting camera movement; performing a reset of the background model by: applying an image segmentation and/or object detection algorithm to identify at least foreground objects; after having performed the reset of the background model, returning to repeatedly updating the background model for the video stream by analyzing changes in the sequence of image frames and categorizing image areas in the image frames which do not change over time as background. The disclosure further relates to an image processing system.
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公开(公告)号：US20240205491A1
公开(公告)日：2024-06-20
申请号：US18536270
申请日：2023-12-12
Applicant: Axis AB
Inventor： Johan NYSTRÖM , Johan FÖRBERG , Song YUAN
IPC: H04N21/431 , G06V20/52 , H04N19/00
CPC classification number: H04N21/4316 , G06V20/52 , H04N19/00
Abstract: A method for adding an overlay to a video sequence includes determining whether a content of the overlay is updated within a time period; then determining whether to provide a second representation of the overlay in a compressed format, wherein it is determined to provide the second representation in response to determining that the content of the overlay is not updated within the time period, and wherein it is determined to not provide the second representation of the overlay in response to determining that the content of the overlay is updated within the time period; and when the second representation of the overlay has been provided, adding the second representation of the overlay to a video frame of the video sequence if a compression ratio of the second representation of the overlay with respect to a first representation of the overlay in an uncompressed format is above a threshold.
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公开(公告)号：US20240114115A1
公开(公告)日：2024-04-04
申请号：US18464313
申请日：2023-09-11
Applicant: Axis AB
Inventor： Axel KESKIKANGAS , Song YUAN , Victor EDPLAM
Abstract: A system and method trigger a second camera in a camera system to perform an action prior to an object appearing in the field of view of the second camera. The camera system includes the second camera for which a location and a field of view is known, and at least a first device for which a location is known. The method comprises receiving, in the second camera, information indicating that the object is approaching the field of view of the second camera. The received information indicates a location and a direction of movement of the object, and, in response to the received information, triggers the second camera to action prior to the object appearing in the field of view of the second camera by: generating an intra frame or initiating an intra refresh procedure, adjusting one or more image processing parameters, or adjusting an exposure time.
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公开(公告)号：US20240104760A1
公开(公告)日：2024-03-28
申请号：US18244337
申请日：2023-09-11
Applicant: Axis AB
Inventor： Song YUAN , Ludvig HASSBRING
CPC classification number: G06T7/70 , G06T7/12 , G06V10/25 , G06V20/52 , G06T2207/30242 , G06V2201/07
Abstract: A method includes detecting a first object in a first area of a scene; determining, based on characteristics of the first object, a first probability value indicating a first probability that the detected first object; detecting a second object in a second area of the scene captured in a second stream of image frames by a second camera of the camera system different from the first camera, wherein the second area at least partly overlaps the first area; determining, based on characteristics of the second object, a second probability value indicating a second probability that the detected second object; and when the second probability value is below a second threshold value and the first probability value is above a first threshold value determining an updated second probability value by increasing the second probability value.
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公开(公告)号：US20230394824A1
公开(公告)日：2023-12-07
申请号：US18322789
申请日：2023-05-24
Applicant: Axis AB
Inventor： Ludvig HASSBRING , Song YUAN
CPC classification number: G06V20/41 , G06T7/248 , G06T7/74 , G06V20/52 , G06T2207/10016 , G06T2207/30232
Abstract: A system and techniques for detecting a reflection of an object in a sequence of image frames. Objects of a given type are detected in the sequence of image frames, and a detection score is determined for each detected object. Distance ratios between unfiltered object position indicators identified for each detected object are determined. A displacement factor is determined for each detected object between a current location of the detected object and a previous location of the detected object. One of the two detected objects which has a lower detection score is a reflection of the other of the two detected objects is determined in response to finding a match between normalized sizes and normalized movements of the detected objects.
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