Patents by Inventor Stefan Lundberg

Stefan Lundberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220141388
    Abstract: A method of activating an object-specific action comprises obtaining, based on image analysis of acquired images, a plurality of values of a movement characteristic, each value representing a moving object detected in the acquired images; receiving an input signal from a user input device, wherein the input signal represents a value of the movement characteristic for the user input device; comparing the value of the movement characteristic for the user input device with each value of the movement characteristics for the moving objects, and determining the moving object corresponding to the closest value of movement characteristic as a selected moving object; and activating the object-specific action for the selected moving object.
    Type: Application
    Filed: October 11, 2021
    Publication date: May 5, 2022
    Applicant: Axis AB
    Inventors: Stefan LUNDBERG, Jonas HJELMSTRÖM
  • Publication number: 20210358088
    Abstract: The present disclosure relates to a method performed by a background blurring system (1) for provision of a video compression stream from a video camera (2) adapted for capturing a scene. The background blurring system identifies (1001) in a first image of the scene, at a first point in time, at least a first pixel comprised in a background of the first image. The background blurring system further determines (1002) a blurred pixel value for the at least first pixel. Moreover, the background blurring system provides (1003), subsequent the first point in time, the blurred pixel value in the video compression stream. The background blurring system furthermore identifies (1004) in a second image of the scene, at a subsequent second point in time, that the at least first pixel has altered to be comprised in a foreground of the second image.
    Type: Application
    Filed: April 28, 2021
    Publication date: November 18, 2021
    Applicant: Axis AB
    Inventors: Stefan LUNDBERG, Song YUAN, Tim BORGLUND
  • Publication number: 20210195075
    Abstract: A camera for introducing light pulses in an image stream, comprising an image sensor arranged to capture an image stream, the image sensor comprising a plurality of pixels arranged to capture light of a first wavelength range. The at least one of the plurality of pixels is covered by a first material which is arranged to transform light of a second wavelength range to light of the first wavelength range. Further the camera comprises a first light source arranged to emit light pulses of light of the second wavelength range onto the first material, thereby causing the image sensor to register light pulses in the at least one pixel covered by the first material.
    Type: Application
    Filed: October 28, 2020
    Publication date: June 24, 2021
    Applicant: Axis AB
    Inventors: Stefan LUNDBERG, Jonas HJELMSTRÖM
  • Publication number: 20210181122
    Abstract: Methods and apparatus, including computer program products, for determining a presence of an object located close to a lens (301) of a camera monitoring a scene. A first infrared illumination source (302) arranged to illuminate the scene from a first angle is activated. A first image (304) is acquired by the image capturing device (300). The first infrared illumination source (302) is deactivated, and a second infrared illumination source (306) arranged to illuminate the scene from a second angle is activated. A second image (308) is acquired by the image capturing device (300). Intensity information of the first image (304) and the second image (308) is compared to determine the presence of an object located close to the lens (301).
    Type: Application
    Filed: November 18, 2020
    Publication date: June 17, 2021
    Applicant: Axis AB
    Inventors: Stefan LUNDBERG, Jonas HJELMSTRÖM
  • Patent number: 10972659
    Abstract: A method, device, and computer program product related to the field of image encoding. In particular, the method, device, and computer program product uses multiple image sensors and multiple encoders for outputting a single encoded image, where image data captured by a first image sensor is added to the encoded image as a first tile or slice, and where image data captured by a second image sensor is added to the encoded image as a second tile or slice.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: April 6, 2021
    Assignee: Axis AB
    Inventors: Björn Ardö, Stefan Lundberg, Stefan Sandström
  • Publication number: 20210097695
    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.
    Type: Application
    Filed: September 21, 2020
    Publication date: April 1, 2021
    Applicant: Axis AB
    Inventors: Stefan LUNDBERG, Song YUAN
  • Patent number: 10834093
    Abstract: A method for restoring a setting on a network connected device achieves increased security. The method includes receiving an initiation signal representing a request to restore the setting on the device; transmitting a request for authorization to restore the setting to an authorization device arranged as an adjacent node on the network by transmitting the request for authorization over a link layer protocol, wherein the request is transmitted in response to the received initiation signal; receiving an encrypted restore authorization response from the authorization device in response to the request for authorization; decrypting, if encrypted, the received restore authorization message; verifying the restore authorization message; and restoring the settings on the network connected device if the restore authorization message was verified.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: November 10, 2020
    Assignee: AXIS
    Inventors: Fredrik Hugosson, Stefan Lundberg
  • Patent number: 10779003
    Abstract: A method, system, and non-transitory computer readable storage medium having instructions for generating an event video sequence. The method comprises receiving input image frames encoded into a sequence of image frames arranged in groups of pictures, each group of pictures having a GOP structure. The method further comprises storing a pre-event sequence of image frames in a first-in-first-out buffer, said pre-event sequence having a first predetermined GOP structure, upon receiving an event notification, retrieving the pre-event sequence from the buffer, and generating the event video sequence by combining the pre-event sequence and a post-event sequence of image frames, said post-event sequence having a second GOP structure, which is different from said first GOP structure. The system may be included in a camera.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: September 15, 2020
    Assignee: Axis AB
    Inventors: Viktor Edpalm, Bjarne Rosengren, Jonas Holmberg, Stefan Lundberg
  • Publication number: 20200068124
    Abstract: A method, device, and computer program product related to the field of image encoding. In particular, the method, device, and computer program product uses multiple image sensors and multiple encoders for outputting a single encoded image, where image data captured by a first image sensor is added to the encoded image as a first tile or slice, and where image data captured by a second image sensor is added to the encoded image as a second tile or slice.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 27, 2020
    Applicant: Axis AB
    Inventors: Björn Ardö, Stefan Lundberg, Stefan Sandström
  • Patent number: 10567713
    Abstract: A camera comprising: an aperture; an image sensor comprising a plurality of pairs of pixels where in each pair: a first pixel is configured such that it detects radiation which has entered the camera through the aperture to the image sensor via a first radiation path, and a second pixel is configured such that it detects radiation which has entered the camera through the aperture to the image sensor via a second radiation path, the second radiation path being different from the first radiation path; and a filter arranged in the vicinity of the aperture, wherein the filter comprises a first portion configured to block IR-radiation or visible light and a second portion configured to be transparent to wavelengths that are blocked by the first portion, wherein radiation passing the first portion travels to the first pixels, and radiation passing the second portion travels to the second pixels.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 18, 2020
    Assignee: Axis AB
    Inventors: Stefan Lundberg, Jonas Hjelmström
  • Patent number: 10554488
    Abstract: A device and method for providing additional functionality to an apparatus having a network connector by which the apparatus is configured to be connected to a network and to be allocated an identifier in the network, wherein the device is adapted to be connected between the network and the apparatus, wherein the device is configured to communicate with the network using a first network portion, wherein the device is configured to communicate with the apparatus using a second network portion, wherein logic circuitry of the device is accessible in the network via the apparatus using the second network portion. The device may be found in a system.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: February 4, 2020
    Assignee: Axis AB
    Inventors: Anil Kumar Metla, Carl-Axel Alm, Stefan Lundberg
  • Patent number: 10531058
    Abstract: A method and assembly produce color images of a scene captured by an image sensor exposed to visible light as well as IR radiation. A first image is captured with a first proportion of an iris aperture covered by an IR-cut filter. A first amount of radiation captured in the first image is determined and a second image captured with a second proportion of the iris covered by the IR-cut filter. A second amount of radiation captured in the second image is determined and a proportion of IR radiation is calculated in the scene based on the first amount of light, the second amount of light, the first IR-cut filter proportion, and the second IR-cut filter proportion. An IR contribution is removed from an image by using the calculated proportion of IR radiation.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: January 7, 2020
    Assignee: AXIS AB
    Inventors: Jonas Hjelmström, Stefan Lundberg, Ingemar Larsson
  • 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
  • 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
  • Patent number: 10235972
    Abstract: The present invention relates to a bit rate controller comprising: a light determination block configured to determine a light level in images of a captured scene; and a maximum bit rate setting block. The maximum bit rate setting block is configured to: upon the light level being determined to be a low light level, set a low-light maximum bit rate; upon the light level being determined to be an intermediate light level, set an intermediate-light maximum bit rate; or upon the light level being determined to be a high light level, set a high-light maximum bit rate. The low-light maximum bit rate is lower than the intermediate-light maximum bit rate. The high-light maximum bit rate is lower than the intermediate-light maximum bit rate.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: March 19, 2019
    Assignee: Axis AB
    Inventor: Stefan Lundberg
  • Publication number: 20190043445
    Abstract: The present invention relates to a bit rate controller comprising: a light determination block configured to determine a light level in images of a captured scene; and a maximum bit rate setting block. The maximum bit rate setting block is configured to: upon the light level being determined to be a low light level, set a low-light maximum bit rate; upon the light level being determined to be an intermediate light level, set an intermediate-light maximum bit rate; or upon the light level being determined to be a high light level, set a high-light maximum bit rate. The low-light maximum bit rate is lower than the intermediate-light maximum bit rate. The high-light maximum bit rate is lower than the intermediate-light maximum bit rate.
    Type: Application
    Filed: October 1, 2018
    Publication date: February 7, 2019
    Inventor: Stefan Lundberg
  • Publication number: 20190007665
    Abstract: A method and assembly produce color images of a scene captured by an image sensor exposed to visible light as well as IR radiation. A first image is captured with a first proportion of an iris aperture covered by an IR-cut filter. A first amount of radiation captured in the first image is determined and a second image captured with a second proportion of the iris covered by the IR-cut filter. A second amount of radiation captured in the second image is determined and a proportion of IR radiation is calculated in the scene based on the first amount of light, the second amount of light, the first IR-cut filter proportion, and the second IR-cut filter proportion. An IR contribution is removed from an image by using the calculated proportion of IR radiation.
    Type: Application
    Filed: June 15, 2018
    Publication date: January 3, 2019
    Applicant: Axis AB
    Inventors: Jonas HJELMSTRÖM, Stefan LUNDBERG, Ingemar LARSSON
  • Patent number: 10165290
    Abstract: The present invention relates to a method for encoding digital video data corresponding to a sequence of digital source images using a cache memory, each of the digital source images having an equal source image width corresponding to a first number of blocks, the cache memory having a cache width corresponding to a second number of blocks, wherein the second number of blocks is smaller than the first number of blocks.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: December 25, 2018
    Assignee: Axis AB
    Inventor: Stefan Lundberg
  • Patent number: 10146101
    Abstract: A method for sequential control of a diaphragm arrangement of a camera, the arrangement comprising a diaphragm, and an integrated IR cut filter always covering at least a portion of an aperture opening of the diaphragm, comprising: initiating closing or opening of the diaphragm; detecting an amount of incident radiation when the diaphragm has an initial aperture opening; shifting the aperture opening to an intermediate aperture opening to alter the ratio between visible light and infrared radiation passing the diaphragm; detecting an amount of incident radiation following the shift; calculating a composition of visual light and infrared radiation in the scene from the detected amounts of incident radiation and a calculated ratio between visible light and infrared radiation when having the initial aperture opening and the intermediate aperture opening, respectively; and shifting the aperture opening of the diaphragm to a new position.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: December 4, 2018
    Assignee: Axis AB
    Inventors: Stefan Lundberg, Jonas Hjelmström
  • Publication number: 20180343163
    Abstract: A device and method for providing additional functionality to an apparatus having a network connector by which the apparatus is configured to be connected to a network and to be allocated an identifier in the network, wherein the device is adapted to be connected between the network and the apparatus, wherein the device is configured to communicate with the network using a first network portion, wherein the device is configured to communicate with the apparatus using a second network portion, wherein logic circuitry of the device is accessible in the network via the apparatus using the second network portion. The device may be found in a system.
    Type: Application
    Filed: May 23, 2018
    Publication date: November 29, 2018
    Applicant: Axis AB
    Inventors: Anil Kumar Metla, Carl-Axel Alm, Stefan Lundberg