Patents Assigned to Axis AB
  • Image stabilization of a video stream captured by a panable and/or tiltable video camera
    Patent number: 11765459
    Abstract: A method for image stabilization of a video stream captured by a panable and/or tiltable video camera the method comprising: generating a motor position signal, Y1, of a pan/tilt motor of the video camera; generating a gyro signal, Y2, of a gyroscopic sensor of the video camera; generating a reference signal from a predetermined movement curve of the pan/tilt motor of the video camera, the reference signal is a reference on how a pan/tilt operation of the video camera is made without shaking of the video camera; from the motor position signal, Y1, and the gyro signal, Y2, generating a combined signal, Y, according to: Y=F1*Y1+F2*Y2, wherein F1 is a low pass filter and F2 is a high pass filter; and performing image stabilization on the video stream based on a difference between the combined signal, Y, and the reference signal.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: September 19, 2023
    Assignee: Axis AB
    Inventors: Tor Nilsson, Johan Förberg, Toivo Henningsson, Johan Nyström
  • Training of an object recognition neural network
    Patent number: 11756303
    Abstract: A method of transfer learning an object recognition neural network comprises acquiring a set of image frames; determining, by a first object recognition algorithm implementing an object recognition neural network, a plurality of object recognitions in the set of image frames; determining verified object recognitions by evaluating the plurality of object recognitions by a second, different from the first, object recognition algorithm, wherein an object recognition with a positive outcome in said evaluating forms a verified object recognition; forming a training set of annotated images comprising image frames associated with the verified object recognitions; performing transfer learning of the object recognition neural network based on the training set of annotated images.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: September 12, 2023
    Assignee: Axis AB
    Inventor: Adam Schill Collberg
  • Video delivery systems using wireless cameras
    Patent number: 11758094
    Abstract: A wearable form factor wireless camera may include an image sensor, coupled to an infrared detection module, which captures infrared video. The wearable form factor wireless camera may attach to clothing worn on a user and be ruggedized. A storage device may store the captured infrared video at a first fidelity. The stored infrared video may be capable of being transmitted at the first fidelity and at a second fidelity, with the first fidelity providing a higher frame rate than the second fidelity. A burst transmission unit may transmit the stored infrared video at the second fidelity via a cellular network. The infrared detection module, the image sensor, the storage device and the burst transmission unit may be powered by a battery. The image sensor, the infrared detection module, the battery, the storage device and the burst transmission unit may be internal to the wearable form factor wireless camera.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: September 12, 2023
    Assignee: AXIS AB
    Inventors: Jon Siann, Bradford S. Wallace
  • Image processing device and a method for encoding images captured by a camera
    Patent number: 11750798
    Abstract: The present invention relates to the field of video encoding. In particular, it relates to a method 300 of encoding images captured by a camera and to an image processing device. An image sequence captured with an image sensor of the camera is obtained S310, and an oscillation frequency of a periodic movement of the camera during capturing of the image sequence is determined S320. A base subset of images of the image sequence corresponding to the oscillation frequency is identified S330 and the base subset of images are encoded S340 into an encoded video stream comprising intra frames and inter frames.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: September 5, 2023
    Assignee: AXIS AB
    Inventors: Fredrik Pihl, Mattias Pettersson
  • ENCODING OF A VIDEO STREAM INCLUDING AN OVERLAY
    Publication number: 20230262238
    Abstract: A method of encoding a video stream including an overlay is provided, including: capturing a first image; adding an overlay to the first image at a first position, and encoding the first image in a first frame of a video stream; capturing a second image of the scene; determining a desired position of the overlay in the second image; encoding the second image in a second frame marked as a no-display frame, and generating and encoding a third frame including temporally predicted macroblocks at the desired position of the overlay referencing the first frame with motion vectors based on a difference between the desired position and the first position, and skip-macroblocks outside of the desired position of the overlay referencing the first frame. A corresponding device, computer program and computer program product are also provided.
    Type: Application
    Filed: February 3, 2023
    Publication date: August 17, 2023
    Applicant: Axis AB
    Inventors: Viktor EDPALM, Song YUAN
  • DIFFERENTIAL FRAME RATE SETTINGS
    Publication number: 20230262335
    Abstract: There is provided techniques for setting frame rates of a camera. The camera comprises a plurality of image sensors arranged to capture images to be stitched into a panorama image of a scene. Information of a respective angle between the optical axis of each of the plurality of image sensors and a direction along which a straight path structure, to be monitored by the camera, extends through the scene is obtained. The plurality of image sensors are divided into at least two groups as a function of the angles. All the angles of the image sensors within each of the at least two groups are part of its own continuous angle interval. One frame rate is set per each of the at least two groups. The frame rate decreases from the group with highest continuous angle interval towards the group with lowest continuous angle interval.
    Type: Application
    Filed: January 27, 2023
    Publication date: August 17, 2023
    Applicant: Axis AB
    Inventor: Björn ARDÖ
  • IR-CUT FILTER SWITCH CONTROL
    Publication number: 20230254598
    Abstract: A method of performing better controlled switching between day mode and night mode imaging in a camera, where those illuminants contributing to the ambient light in day mode are considered when determining the visible light during night mode. Characteristic values of those illuminants are mixed with several levels of IR light to simulate the presence of an IR illuminator, and these characteristic values are compared to corresponding values derived from the color components of the ambient light in night mode in order to determine the IR proportion, and from that the amount of visible light.
    Type: Application
    Filed: January 12, 2023
    Publication date: August 10, 2023
    Applicant: Axis AB
    Inventors: Axel Thuresson, Ola Synnergren
  • Dual-head dome camera
    Patent number: 11722755
    Abstract: A dome camera has a base, two camera heads and a dome cover. The base is configured for mounting the dome camera to a surface. The two camera heads are arranged on the base. The dome cover is arranged over the camera heads and the base. The dome cover includes at least two dome-shaped sections, wherein each dome-shaped section covers a camera head, and a center section joining the dome-shaped sections. The dome cover is formed in a single piece.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: August 8, 2023
    Assignee: Axis AB
    Inventors: Andreas Hertzman, Åke Södergård, Magnus Ainetoft
  • Method and digital video camera for forming a combined image frame of a combined video stream
    Patent number: 11722697
    Abstract: A method for forming a combined image frame of a combined video stream comprises: capturing image frames of first and second video streams; encoding image data of the image frames of the first and second video streams, wherein each image frame of the first and second video streams are respectively encoded into first and second encoded data comprising a plurality of rows wherein each row has a height of a single coding unit and a width equal to a width of the image frame and is encoded as one or more slices; and combining the first and second encoded data into combined encoded data by interleaving rows of the first and second encoded data. The combined encoded data representing the combined image frame of the combined video stream.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: August 8, 2023
    Assignee: Axis AB
    Inventors: Viktor Edpalm, Alexander Toresson, Johan Palmaeus, Jonas Cremon
  • Image processing device and method of pre-processing images of a video stream before encoding
    Patent number: 11716475
    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.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: August 1, 2023
    Assignee: AXIS AB
    Inventors: Fredrik Pihl, Mattias Pettersson
  • Arrangement for assessing ambient light in a video camera
    Patent number: 11711622
    Abstract: An arrangement for determining an amount of light reaching an image sensor of a video camera is disclosed. The video camera comprises an imaging lens system guiding a beam path towards an image sensor and has an aperture plane where a variable aperture is arranged. The inventive arrangement comprises a light sensor arranged to probe light intensity continuously from a portion of the beam path, which portion is located in or near the aperture plane of the imaging lens system.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: July 25, 2023
    Assignee: Axis AB
    Inventors: Jonas Hjelmström, Ola Håkansson
  • Method and device for partially unmasking an object in a video stream
    Patent number: 11704435
    Abstract: A method for partially unmasking an object in a video stream comprises: displaying a first video stream in which objects are covered by privacy masks; receiving user input regarding a selection of an object being covered by a privacy mask, wherein the object has a first portion being associated with a first privacy level and a second portion being associated with a second, higher, privacy level; checking that a permission associated with the user input grants access to video data depicting object portions being associated with the first privacy level; giving access to video data depicting the first portion of the object; and displaying a second video stream which differs from the first video stream in that it includes the video data depicting the first portion of the object, while the second portion of the object is still covered by a privacy mask.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: July 18, 2023
    Assignee: AXIS AB
    Inventors: Axel Keskikangas, David Hjerpe
  • Monitoring camera
    Patent number: D992625
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: July 18, 2023
    Assignee: AXIS AB
    Inventors: Simon Herrlander, Jonna Lagerblad, Jonas Sjögren, Mathias Walter, Mariano Vozzi, Maiko Karlsson, John Schlager, Isabelle Veraeus, Tobias Karenil
  • Monitoring camera
    Patent number: D992626
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: July 18, 2023
    Assignee: AXIS AB
    Inventors: Simon Herrlander, Jonna Lagerblad, Jonas Sjögren, Mathias Walter, Mariano Vozzi, Maiko Karlsson, John Schlager, Isabelle Veraeus, Tobias Karenil
  • Monitoring camera
    Patent number: D992627
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: July 18, 2023
    Assignee: AXIS AB
    Inventors: Simon Herrlander, Jonna Lagerblad, Jonas Sjogren, Mathias Walter, Mariano Vozzi, Maiko Karlsson, John Schlager, Isabelle Veraeus, Tobias Karenil
  • Camera system component
    Patent number: D993305
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: July 25, 2023
    Assignee: AXIS AB
    Inventors: Jonas Sjogren, Sebastian Lundblad, Mariano Vozzi, Mathias Walter, Jons Danelius, Warren Bates, Malte Bokvist, Linus Lindblom
  • Monitoring camera
    Patent number: D995605
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: August 15, 2023
    Assignee: AXIS AB
    Inventors: Jonas Sjögren, Maiko Karlsson, Julia Giver, Olaf Hoyer, Henrik Svedberg
  • Monitoring camera
    Patent number: D995610
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: August 15, 2023
    Assignee: AXIS AB
    Inventors: Jonas Sjögren, Mathias Walter, Mariano Vozzi, Agnes Rusz, Henrik Persson, Mattias Uttke, Rasmus Axenram
  • Monitoring camera
    Patent number: D996499
    Type: Grant
    Filed: March 27, 2023
    Date of Patent: August 22, 2023
    Assignee: AXIS AB
    Inventors: Ola Andersson, Kim Nordkvist, Johan Bergsten, Johan Widerdal, Jakob Holmquist, Jonas Sjögren, Sebastian Engwall, Mariano Vozzi, Christian Jacobsson, Mikael Persson
  • Monitoring camera
    Patent number: D996500
    Type: Grant
    Filed: March 27, 2023
    Date of Patent: August 22, 2023
    Assignee: AXIS AB
    Inventors: Ola Andersson, Kim Nordkvist, Johan Bergsten, Johan Widerdal, Jakob Holmquist, Jonas Sjögren, Sebastian Engwall, Mariano Vozzi, Christian Jacobsson, Mikael Persson