Patents Assigned to Axis AB
  • Method of reducing purple fringing in images
    Patent number: 10417752
    Abstract: A method of reducing purple fringing in images captured by a camera, comprises: acquiring a raw image of a scene with an image sensor of the camera, demosaicing the raw image, and applying an adjusted color correction matrix to the demosaiced raw image. The adjusted color correction matrix is deduced by calibrating the spectral response of the image sensor to a color rendition chart to which the color data of a purple fringe has been added, and furthermore the color correction matrix is adjusted such that the image sensor response for color values of the purple fringe is transformed into color values of a predetermined replacement color following application of the color correction matrix.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: September 17, 2019
    Assignee: Axis AB
    Inventors: Sebastian Fors, Johan Jeppsson
  • Camera cover glass unit with water removal function
    Patent number: 10394021
    Abstract: A camera cover glass unit comprises a cover glass, arranged to protect an image capturing unit of a camera and a cover glass frame arranged to hold the cover glass is disclosed. A resilient structure is mounted between the cover glass and the cover glass frame and allows the cover glass to move in relation to the cover glass frame. A first permanent magnet is attached to the cover glass, and a motor is arranged to rotate a second permanent magnet in relation to the first magnet, in order to achieve a time-variant magnetic field, such that the second magnet attracts and repels the first magnet to a varying degree, thereby causing the cover glass to move in relation to the frame.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: August 27, 2019
    Assignee: Axis AB
    Inventors: Jens Pahlitzsch, Sven Svensson
  • Monitoring camera direction control
    Patent number: 10397485
    Abstract: A camera control unit, having “learned” how objects typically move in a monitored scene, provides help to an operator by moving a monitoring camera according to representative movement of the objects in the scene. The representative movement may be derived in a learning procedure using object motion analysis.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: August 27, 2019
    Assignee: Axis AB
    Inventor: Stefan Lundberg
  • IR-filter arrangement
    Patent number: 10386554
    Abstract: An infrared (IR) filter arrangement for a camera having an associated IR illuminator, the arrangement comprising: a fixedly arranged bandpass IR filter filtering out IR frequencies other than those from the IR illuminator; and an IR cut filter at least blocking any IR wavelength transmitted by the fixed band-pass filter, the IR filter being integrated in a diaphragm of the camera, such that closing of the diaphragm aperture entails an increased relative proportion of the diaphragm aperture being covered by the IR cut filter, and opening of the diaphragm aperture entails a decreased relative proportion of the diaphragm aperture being covered by the IR cut filter.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: August 20, 2019
    Assignee: Axis AB
    Inventors: Jonas Hjelmström, Stefan Lundberg
  • Method, a video encoder, and a video camera for encoding a video stream
    Patent number: 10382780
    Abstract: A method of encoding a video stream comprising receiving a frame of a video stream to be encoded, performing motion detection in the frame to identify steady regions, and temporally filtering the frame so as to provide temporally filtered pixel values. For a pixel in the steady regions of the frame, the temporally filtered pixel value is used when encoding the pixel, on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded. On a condition that the pixel instead belongs to a block of pixels of the frame that will be inter-coded, a value that was used when encoding a corresponding pixel of the immediately preceding frame is used when encoding the pixel.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: August 13, 2019
    Assignee: Axis AB
    Inventors: Anton Öhrn, Viktor Edpalm, Henrik Eliasson, Björn Benderius, Niclas Svensson, Xing Danielsson Fan, Fredrik Pihl
  • WIRELESS NETWORK CAMERA SYSTEMS
    Publication number: 20190246072
    Abstract: Apparatus, systems and techniques associated with battery powered wireless camera systems are provided. In an example, a system includes a battery powered wireless camera including an internal battery to provide energy and an image capture module to capture images. Further, the battery powered wireless camera includes a low-bandwidth radio transceiver which may wirelessly communicate with a base station and a micro switch, and may receive commands for operation of the battery powered wireless camera. The battery powered wireless camera also includes a high-bandwidth radio transceiver which may wirelessly communicate with the base station. If the high-bandwidth radio transceiver is powered down, the image capture module may store captured images. If the micro switch triggers activation, the high-bandwidth radio transceiver may power up and transmit the captured images to the base station.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 8, 2019
    Applicant: AXIS AB
    Inventors: Jon Siann, Dennis James Espey
  • Method and system for determining spatial characteristics of a camera
    Patent number: 10373035
    Abstract: A method and system for determining a position of a camera is disclosed. The method and system includes determining and registering geographical coordinates of a mobile device in the mobile device itself, presenting on a display of the mobile device a pattern representing the geographical coordinates of the mobile device, capturing by the camera an image of the display of the mobile device when presenting the geographical coordinates, translating in the camera the pattern in the captured image of the display of the mobile device into geographical coordinates, and determining in the camera the position of the camera based on the geographical coordinates translated from the pattern in the captured image.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: August 6, 2019
    Assignee: Axis AB
    Inventors: Markus Skans, Björn Ardö, Igor Gurovski
  • CAMERA WITH HEATING ARRANGEMENT, AND METHOD OF HEATING A CAMERA VIEWING WINDOW
    Publication number: 20190227304
    Abstract: A camera comprising a movable camera head, a transparent viewing window through which the camera head is arranged to capture images, and a heating arrangement for heating the viewing window is disclosed. The viewing window comprises an electrical conductor. The heating arrangement comprises an electrical contact device for contacting the conductor and applying an electric current to the conductor in a portion of the viewing window, thereby heating the conductor in the portion of the viewing window, and a movement device for movement of the heating arrangement in coordination with a movement of the camera head. A method of heating a viewing window of a camera is also disclosed.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 25, 2019
    Applicant: Axis AB
    Inventors: Helen Eftekhari, Linn Egelberg, Mikael Persson, Göran Lindfors
  • FASTENING ARRANGEMENT, A FASTENING ARRANGEMENT KIT AND USE OF A FASTENING ARRANGEMENT KIT
    Publication number: 20190222724
    Abstract: A fastening arrangement (100), a fastening arrangement kit comprising such a fastening arrangement, in addition to an electronic device, and use of such a fastening arrangement for mounting the electronic device. The fastening arrangement comprises a mounting support (200) for attachment to a mounting surface. The electronic device is attached to the mounting support using a fastener portion. The fastener portion forms part of a connector (400), which is attached to the mounting support by securing an H-shaped attachment portion in an elongated opening. The H-shaped structure is rotated in place in the elongated opening and fixed using at least two stops positioned on either side of the of the attachment portion. The mounting support comprises one of the H-shaped attachment portion and the elongated opening, and the connector comprises the other.
    Type: Application
    Filed: December 21, 2018
    Publication date: July 18, 2019
    Applicant: Axis AB
    Inventor: Tommy Vestergren
  • METHOD OF FOCUSING A CAMERA
    Publication number: 20190215439
    Abstract: A method of focusing a camera with a movable field of view includes obtaining a current field of view setting corresponding to a current field of view of the camera, retrieving, based on the obtained current field of view setting, focusing data pertaining to the focusing method that was previously used to focus the camera for a previous field of view, at least partly overlapping the obtained current field of view, by accessing a focusing assisting database comprising a plurality of camera focusing entries, wherein each camera focusing entry includes a respective previous field of view setting, corresponding to a respective previous field of view and thereto associated focusing data pertaining to the focusing method that was previously used to focus the camera for the respective previous field of view.
    Type: Application
    Filed: June 15, 2018
    Publication date: July 11, 2019
    Applicant: Axis AB
    Inventors: Björn Ardö, Sebastian Hultqvist
  • WIRELESS NETWORK CAMERA SYSTEMS
    Publication number: 20190213854
    Abstract: Apparatus, systems and techniques associated with battery powered wireless camera systems. One aspect of the subject matter described in this specification can be embodied in a system that includes a battery powered wireless camera including an internal battery to provide energy and a burst transmission unit to transmit information during burst periods. The system includes a base station, separated from the battery powered wireless camera, in wireless communication with the battery powered wireless camera to receive information from the battery powered wireless camera. The base station is configured to process the received information and includes a web server to transmit the processed information to a client. Other embodiments of this aspect include corresponding systems, apparatus, and computer program products.
    Type: Application
    Filed: January 6, 2017
    Publication date: July 11, 2019
    Applicant: AXIS AB
    Inventors: Jon Siann, Dennis James Espey
  • Method and device for real-time encoding
    Patent number: 10349081
    Abstract: The present invention relates to a method, an encoder, a computer program product, and a system for real-time encoding. The encoder is arranged to receive movement information about a movement of a camera, the encoder being arranged to encode, in real-time, a video stream acquired by the camera during the movement of the camera, wherein the encoder is arranged to encode based on said movement information. The movement information may be stored in a memory.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: July 9, 2019
    Assignee: Axis AB
    Inventor: Johan Nystrom
  • Camera and method for controlled dew formation inside a camera
    Patent number: 10338455
    Abstract: A camera comprising an at least partly transparent housing and an imaging device arranged inside the at least partly transparent housing, wherein the imaging device is configured to capture images through the at least partly transparent housing. The camera further comprising a casing at least partly enclosing the imaging device and arranged between the housing and the imaging device, the casing defining at least one cavity forming an intermediate space being in fluid communication with an inner space present between the casing and the imaging device and an outer space present between the housing and the casing. A method for controlled dew formation inside the camera.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: July 2, 2019
    Assignee: Axis AB
    Inventor: Daisuke Sasaki
  • Video encoding method and video encoder system
    Patent number: 10341675
    Abstract: A method of encoding digital video data corresponding to a sequence of input video frames is disclosed. The input video frames are encoded into a sequence of output video frames. The method comprises encoding a first input video frame in a first encoder instance using intra-frame encoding to produce a first intra-frame, decoding the first intra-frame to produce a first decoded frame, encoding the first decoded frame in a second encoder instance to produce a first output video frame. A digital video encoding system is also disclosed, as well as a camera comprising such a system, and a computer program product for performing the method.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 2, 2019
    Assignee: AXIS AB
    Inventors: Fredrik Pihl, Mats Lund
  • SETTING OF A MOTION TRIGGER LEVEL
    Publication number: 20190197702
    Abstract: A method for setting a motion trigger level is used in detection of motion in a video stream depicting a scene which includes receiving data pertaining to a video stream depicting the scene; dividing the scene into a plurality of specific portions; wherein each image frame of the video stream comprises multiple blocks of pixels, wherein each specific portion of the scene is associated with one or more block of pixels; and for each specific portion of the scene: evaluating, over time, statistical features of bitrate associated with an encoding of block of pixels pertaining to the specific portion of the scene; determining a motion base level based on the evaluated statistical features of bitrate associated with the encoding of block of pixels pertaining to the specific portion of the scene; and setting a motion trigger level based on the motion base level.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 27, 2019
    Applicant: Axis AB
    Inventors: Viktor Edpalm, Axel Keskikangas
  • DETERMINATION OF A CONTRAST VALUE FOR A DIGITAL IMAGE
    Publication number: 20190199933
    Abstract: A method for determining a local contrast value for a digital image captured by an image sensor in a camera comprising: applying an edge detection algorithm to image data of the digital image, thereby obtaining a data set pertaining to edges in the digital image; calculating, based on said data set, an edge occurrence value for the digital image; estimating, based on image data of the digital image and a noise model of the image sensor, an estimated image sensor noise for the digital image; and computing the local contrast value as a relationship between the edge occurrence value of the digital image and the expected edge occurrence value for the digital image. A method for adjusting a focus setting of a camera using the local contrast value for images captured by the camera.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 27, 2019
    Applicant: Axis AB
    Inventors: Dennis Nilsson, Björn Benderius, Johan Jeppsson, Johan Nyström
  • Monitoring camera
    Patent number: D856397
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: August 13, 2019
    Assignee: AXIS AB
    Inventors: Daniel Ahman, Mathias Walter, Nina Bergius, Kristoffer Barnekow, Maiko Karlsson, Peter Betmark
  • Monitoring camera
    Patent number: D857079
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: August 20, 2019
    Assignee: AXIS AB
    Inventors: Samir Helaoui, Johan Bergsten, Mikael Persson, Jens Pahlitzsch, Rafael Portela, Daniel Ahman, Morten Bergstrom, Henrik Svedberg, Christian Jacobsson, Niclas Lewin
  • Housing for a peripheral data processing device
    Patent number: D860198
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 17, 2019
    Assignee: Axis AB
    Inventors: Sebastian Engwall, Mathias Walter, Mariano Vozzi, Jens Pahlitzsch, Daniel Åhman
  • Housing for a data processing device
    Patent number: D860991
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 24, 2019
    Assignee: Axis AB
    Inventors: Sebastian Engwall, Mathias Walter, Mariano Vozzi, Jens Pahlitzsch, Daniel Åhman