公开(公告)号：US20240422362A1

公开(公告)日：2024-12-19

申请号：US18734460

申请日：2024-06-05

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Viktor EDPALM

IPC: H04N19/91 ,  H04N19/156 ,  H04N19/70

Abstract: A method of processing digital video data comprises continuously capturing digital video data representing image frames. While capturing the digital video data, the digital video data is encoded into a sequence of encoded image frames, the sequence comprising key frames and delta frames, and storing the sequence of encoded image frames. It is then determined that the stored sequence of encoded image frames is to be entropy coded and, as a consequence, entropy coding the sequence of encoded image frames into an entropy coded sequence of image frames and storing the entropy coded sequence of image frames.

公开(公告)号：US20240331161A1

公开(公告)日：2024-10-03

申请号：US18613890

申请日：2024-03-22

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Song YUAN ,  Viktor EDPALM

IPC: G06T7/11 ,  G06T7/136 ,  G06T7/194

CPC classification number: G06T7/11 ,  G06T7/136 ,  G06T7/194 ,  G06T2207/10016

Abstract: A device and a method mask an object in a video stream. The camera is arranged in a system including the camera and another device. A location and field of view is known for the device and the camera. Furthermore, the field of view of the device and the camera are non-overlapping. Information indicating that an object is approaching the field of view of the camera is obtained. The obtained information is determined from the device indicating a location and a direction of movement of the object and the known locations and fields of view of the camera and the device. In response to the information, a threshold for detecting objects to be masked in the video stream captured by the camera is reduced. An object to be masked in the video stream is detected using the reduced threshold, and masking of the object in the video stream is inserted.

公开(公告)号：US20230412815A1

公开(公告)日：2023-12-21

申请号：US18327341

申请日：2023-06-01

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Song YUAN ,  Viktor EDPALM

IPC: H04N19/136 ,  H04N19/176 ,  H04N19/172 ,  H04N19/167 ,  H04N23/80

CPC classification number: H04N19/136 ,  H04N19/176 ,  H04N19/172 ,  H04N19/167 ,  H04N23/80

Abstract: An image processing device, a camera system, a non-transitory computer-readable storage medium, and methods for encoding two video image frames captured by one of two image sensors, wherein each of the video image frames depicts a respective portion of a scene. A respective overlapping area is identified in each of the video image frames, which overlapping areas both depict a same sub-portion of the scene, and a video image frame of the video image frames is selected. Compression levels are then set for the image frames, wherein respective compression levels are set for pixel blocks in the selected video image frame based on a given principle. Respective compression levels for pixel blocks in the overlapping area in the selected video image frame are selectively set higher or lower than respective compression levels that would have been set based on the given principle. The video image frames are then encoded.

公开(公告)号：US20230134104A1

公开(公告)日：2023-05-04

申请号：US17968329

申请日：2022-10-18

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Martin NILSSON

IPC: G06F21/55 ,  G06F21/60

Abstract: Upon detecting an event indicating enabling of security sensitive functionality of an electronic device, a value previously unknown to the electronic device is obtained and the current content of the data storage to a new current content of the data storage is updated according to an updating function based on the current content of the data storage and the value, wherein, without privileged access, the current content of the data storage can only be updated using the updating function. The value is further obtained in a management module and an expected new current content of the data storage is determined in the management module according to the updating function based on known original content of the data storage and the value. Upon determining that the new current content of the data storage differs from the expected new current content of the data storage, a validation module generates a security notification.

公开(公告)号：US20230328260A1

公开(公告)日：2023-10-12

申请号：US18295556

申请日：2023-04-04

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Viktor Edpalm

IPC: H04N19/167 ,  G06T7/70 ,  G06V10/25 ,  H04N19/159

CPC classification number: H04N19/167 ,  G06T7/70 ,  G06V10/25 ,  H04N19/159 ,  G06V2201/07 ,  G06T2207/20084

Abstract: A method of encoding an image comprises establishing whether objects constituting one or more predefined object types or performing one or more predefined event types are visible in the image; in response to establishing that the objects are visible, encoding at least one region-of-interest of the image using a non-generative image model, thereby obtaining first image data; and encoding any remainder of the image using a generative image model, thereby obtaining second image data, wherein use of the non-generative image model enables decoding of the first image data without relying on information derived from images other than the encoded image or, if the image is a frame in a video sequence, enables decoding of the first image data without relying on information derived from images outside the video sequence.

公开(公告)号：US20220286621A1

公开(公告)日：2022-09-08

申请号：US17570774

申请日：2022-01-07

Applicant: Axis AB

Inventor： Axel KESKIKANGAS ,  Viktor EDPALM ,  Mattias PETTERSSON

IPC: H04N5/232 ,  G06V20/40 ,  G11B20/10 ,  G06T5/00 ,  G11B27/028

Abstract: A method of providing an event-initiated video sequence, comprises a pre-event video sequence and a post-event video sequence. The pre-event image frames are stored in a non-processed format until such time that an event is taking place. By postponing the image processing of the pre-event video sequence, power savings are accomplished.

公开(公告)号：US20220086450A1

公开(公告)日：2022-03-17

申请号：US17398658

申请日：2021-08-10

Applicant: Axis AB

Inventor： Sebastian HULTQVIST ,  Viktor EDPALM ,  Axel KESKIKANGAS ,  Anton ELIASSON

IPC: H04N19/137 ,  H04N19/114 ,  H04N19/159 ,  G06K9/00 ,  H04N19/52

Abstract: A method for encoding a video stream for the provision of prunable video data, comprising identifying, in the video stream, a first event-generating occurrence in one or more frames of the video stream, and, in an encoder, using the event-generating occurrence to initiate a hierarchical branch extending from a base-layer when encoding the video stream.

公开(公告)号：US20210405601A1

公开(公告)日：2021-12-30

申请号：US17336992

申请日：2021-06-02

Applicant: Axis AB

Inventor： Sebastian HULTQVIST ,  Axel KESKIKANGAS

IPC: G05B19/042

Abstract: A method, implemented in a device, for remote resetting of the device to factory default settings, the device comprising an electric circuit adapted to carry out the factory default reset and a secure processing and storage environment, SPSE, the method comprising: receiving, at the SPSE, a request to reset the device to factory default settings and a challenge associated with the request, wherein the request and the challenge are received via a network; initiating, by the SPSE, a reset to factory default settings of the device by communicating with the electric circuit via a communication channel; and sending, by the SPSE, a confirmation via the network, wherein the confirmation includes a response to the challenge as produced by the SPSE and an attestation report, the attestation report being a declaration by the SPSE that the reset to factory default settings is initiated or carried out.

公开(公告)号：US20230199195A1

公开(公告)日：2023-06-22

申请号：US18080251

申请日：2022-12-13

Applicant: Axis AB

Inventor： Mattias X. PETTERSSON ,  Viktor EDPALM ,  Axel KESKIKANGAS

IPC: H04N19/146 ,  H04N7/18 ,  H04N19/107 ,  H04N19/172 ,  H04N19/593

CPC classification number: H04N19/146 ,  H04N7/185 ,  H04N19/107 ,  H04N19/172 ,  H04N19/593

Abstract: A method and image processing device for encoding a video comprising a sequence of image frames captured between a first and a second time is disclosed. The method comprises encoding a subset of the image frames, wherein the image frames of the subset are distributed over the sequence and storing the remaining image frames of the sequence. After the second time, the encoded subset is decoded and the stored remaining image frames as well as the decoded encoded subset are encoded to generate the encoded video. Alternatively, the stored remaining image frames are encoded and the encoded subset added to generate the encoded video.

公开(公告)号：US20230086993A1

公开(公告)日：2023-03-23

申请号：US17864400

申请日：2022-07-14

Applicant: Axis AB

Inventor： Niclas DANIELSSON ,  Xing Danielsson FAN ,  Axel KESKIKANGAS

IPC: G06T7/136 ,  G06T7/11 ,  G06V10/82

Abstract: A method of generating a segmentation outcome which indicates individual instances of one or more object classes for an image in a sequence of images is disclosed. The method comprises: determining (501) a coherent region of the image; processing (502) the image to determine a tensor representing pixel-specific confidence scores; generating (503) a series of temporary segmentation masks for the coherent region, wherein each temporary segmentation mask is generated by interpreting the tensor with respect to a single object class using a different temporary confidence score threshold; evaluating (504) the series of temporary segmentation masks to determine if an object mask condition is met; depending on the outcome of the evaluation, setting (505) the temporary confidence score threshold as a final confidence score threshold for the pixels of the temporary segmentation mask, or setting (505) a default confidence score threshold as a final confidence score threshold for the coherent region; and generating (506) a final segmentation outcome for the image.