公开(公告)号：US20220132030A1

公开(公告)日：2022-04-28

申请号：US17498251

申请日：2021-10-11

Applicant: Axis AB

Inventor： Viktor EDPALM ,  Song YUAN ,  Raphael TELLER

IPC: H04N5/232 ,  H04N19/52 ,  H04N19/85

Abstract: Methods and apparatus, including computer program products, for processing a stream of image frames captured by a camera system. When an image frame from the stream of image frames is dropped, a current camera movement is determined. A substitute image frame for the dropped image frame is generated. The substitute image frame comprises a reference to a previous image frame and includes one or more motion vectors estimated solely based on the determined current camera movement. Remaining image frames in the stream of image frames are encoded and the substitute image frame is inserted at the place of the dropped image frame in the stream of encoded image frames.

公开(公告)号：US20220124339A1

公开(公告)日：2022-04-21

申请号：US17499887

申请日：2021-10-13

Applicant: Axis AB

Inventor： Fredrik PIHL ,  Mattias PETTERSSON

IPC: H04N19/132 ,  H04N19/146 ,  H04N19/59 ,  H04N19/172

Abstract: An image processing device 300, a non-transitory computer readable storage medium, a monitoring camera 200 and a method 100 of pre-processing images of a video stream before encoding the video stream are disclosed. The images are obtained S110, wherein the obtained images have a first resolution. The obtained images are subsampled S120 to intermediate images having a second resolution lower than the first resolution and lower than a third resolution. The intermediate images are upsampled S130 to output images having the third resolution, wherein the third resolution is the same for all images of the video stream.

公开(公告)号：USD948369S1

公开(公告)日：2022-04-12

申请号：US29740783

申请日：2020-07-07

Applicant: Axis AB

Designer： Theodor Wahlgren ,  Felix Carlsson ,  Jonas Sjögren ,  Sebastian Engwall ,  Mariano Vozzi ,  Mathias Walter ,  Oskar Odén

公开(公告)号：US20220078412A1

公开(公告)日：2022-03-10

申请号：US17366129

申请日：2021-07-02

Applicant: Axis AB

Inventor： Fredrik PIHL ,  Malte JOHANSSON

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/182 ,  H04N19/176

Abstract: There is provided an image pipeline and a method therein for intra-coding an image frame. The image pipeline comprises a processing part followed by an encoding part supporting a plurality of intra-prediction modes used for intra-coding image frames. The method comprises receiving an image frame and for at least one block of pixel values in the image frame: predicting pixel values of the at least one block of pixel values using an intra-prediction mode supported by the encoding part and updating the image frame by adjusting at least one pixel value within the at least one block of pixel values so as to reduce a residual between the at least one pixel value and a corresponding predicted pixel value. Further, the method comprises intra-coding the updated image frame using at least one out of the plurality of intra-prediction modes.

公开(公告)号：USD943630S1

公开(公告)日：2022-02-15

申请号：US29789537

申请日：2021-09-29

Applicant: AXIS AB

Designer： Johan Forberg

公开(公告)号：US11232664B2

公开(公告)日：2022-01-25

申请号：US17231013

申请日：2021-04-15

Applicant: Axis AB

Inventor： Daniel Andersson ,  Ingemar Larsson

IPC: G07C9/27

Abstract: The present application concerns access control for controlling unlocking of a door (102) at the presentation of credentials (108) at the door. A credentials relay unit (112) and a lock controller (114) are mounted in the vicinity of the door. The credentials relay unit transmits received credentials to a pre-configured, first network address, and in addition transmits a wake-up signal (122) to the lock controller, which upon receipt of the wake-up signal will transmit a request (126) for instructions to a pre-configured, second network address. In response to the request, the lock controller receives unlocking or no-action instructions (128a, 128b), and in case unlocking instructions are received, the lock controller transmits an unlocking signal (132).

公开(公告)号：US20220020159A1

公开(公告)日：2022-01-20

申请号：US17333368

申请日：2021-05-28

Applicant: Axis AB

Inventor： Daniel FALK ,  Filip JARDBY

IPC: G06T7/246 ,  G06T7/70

Abstract: A method for counting a number of moving objects that cross at least one predefined curve in a scene comprises making detections of positions of one or more moving objects in the scene, tracking the positions of the moving objects over time based on the detections to produce one or more corresponding tracks, wherein each track is described by a time dependent probability density function, calculating, for each moving object, a success probability pi that the moving object succeeded to cross the at least one predefined curve in the scene, wherein the success probability is calculated by using the time dependent probability density function describing the track of the moving object, and calculating an expected value and a variance of a number of moving objects that crossed the at least one predefined curve by summing success probabilities pi and summing products pi(1−pi) of success and corresponding failure probabilities, respectively.

公开(公告)号：US20210409573A1

公开(公告)日：2021-12-30

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

IPC: H04N1/44 ,  G06T11/00 ,  H04N1/58 ,  H04N1/40

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.

公开(公告)号：US11196661B2

公开(公告)日：2021-12-07

申请号：US16731895

申请日：2019-12-31

Applicant: Axis AB

Inventor： Jon Malmquist ,  Johan Rönnåker ,  Emil Selinder ,  Mathias Bruce ,  Marcus Johansson

IPC: H04L12/733 ,  H04W76/12 ,  H04W76/11 ,  G07C9/27 ,  H04L12/46 ,  H04L12/709 ,  H04L29/06 ,  H04L29/08 ,  H04W4/021 ,  H04W88/04 ,  G07C9/00

Abstract: A device may include a memory storing instructions and a processor configured to execute the instructions to identify a communication link between a first domain object and a second domain object; identify a first endpoint associated with the first domain object and a second endpoint associated with the second domain object; and determine a location relationship between the first endpoint and the second endpoint. The processor may be further configured to select a communication mechanism based on the determined location relationship; instruct the first endpoint to communicate with the second endpoint using the selected communication mechanism; and instruct the second endpoint to communicate with the first endpoint using the selected communication mechanism.

公开(公告)号：US20210366218A1

公开(公告)日：2021-11-25

申请号：US17231013

申请日：2021-04-15

Applicant: Axis AB

Inventor： Daniel ANDERSSON ,  Ingemar LARSSON

IPC: G07C9/27

Abstract: The present application concerns access control for controlling unlocking of a door (102) at the presentation of credentials (108) at the door. A credentials relay unit (112) and a lock controller (114) are mounted in the vicinity of the door. The credentials relay unit transmits received credentials to a pre-configured, first network address, and in addition transmits a wake-up signal (122) to the lock controller, which upon receipt of the wake-up signal will transmit a request (126) for instructions to a pre-configured, second network address. In response to the request, the lock controller receives unlocking or no-action instructions (128a, 128b), and in case unlocking instructions are received, the lock controller transmits an unlocking signal (132).