公开(公告)号：US20180367789A1

公开(公告)日：2018-12-20

申请号：US16005128

申请日：2018-06-11

Applicant: Axis AB

Inventor： Toivo Henningsson ,  Song Yuan

IPC: H04N13/293 ,  G06T7/00 ,  G06T1/20

Abstract: There is provided a method performed in a multi-sensor video camera having a first and a second sensor with partly overlapping fields of view. A first and a second received video frame being simultaneously captured each has a non-overlapping portion and an overlapping portion. A frame of a first video stream is generated by joining together image data from the non-overlapping portions of the first and the second video frame with image data from the overlapping portion of the first video frame only, and a frame of a second video stream is generated to include image data from the overlapping portion of at least the second video frame. The frame of the first video stream and the frame of the second video stream are processed in parallel, wherein the processing of the frame of the second video stream includes preparing an overlay based on the image data from the overlapping portion of at least the second video frame. The overlay is added to the processed frame of the first video stream at a portion thereof corresponding to the overlapping portion of the first video frame. Image data from the overlapping portion of the first video frame is blended with image data from the overlapping portion of the second video frame in at least one of the steps of preparing the overlay and adding the overlay.

公开(公告)号：US20180190091A1

公开(公告)日：2018-07-05

申请号：US15395856

申请日：2016-12-30

Applicant: Axis AB

Inventor： Song Yuan

IPC: G08B13/196 ,  H04N7/18 ,  H04N21/4402 ,  H04N21/422

CPC classification number: G08B13/19693 ,  G08B13/19682 ,  H04N7/181 ,  H04N19/115 ,  H04N19/132 ,  H04N19/162 ,  H04N19/167 ,  H04N19/17 ,  H04N19/40 ,  H04N21/42222 ,  H04N21/440281

Abstract: A method may include receiving a video stream from a camera and displaying the video stream on a display. The method may further include obtaining, via an eye tracking sensor, information identifying a gaze area for a user watching the display; generating a gradient from the gaze area to edges of the display; and instructing the camera to decrease a bit rate of the video stream outside the gaze area based on the generated gradient.

公开(公告)号：US20180173956A1

公开(公告)日：2018-06-21

申请号：US15851028

申请日：2017-12-21

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Erik Andersson ,  Song Yuan

IPC: G06K9/00 ,  G06K9/62

CPC classification number: G06K9/00718 ,  G06K9/00771 ,  G06K9/4628 ,  G06K9/6256 ,  G06K9/6262 ,  G06K9/6271 ,  G06K9/6293 ,  G06K2009/00738 ,  G06N3/0445 ,  G06N3/084 ,  H04N7/183

Abstract: A method for identifying events in a scene captured by a motion video camera comprises two identification processes, a temporary identification process and a long-term identification process. The temporary process includes: analyzing pixel data from captured image frames and identifying events; registering camera processing data relating to each image frame subjected to the identification of events; and adjusting weights belonging to an event identifying operation, wherein the weights are adjusted for achieving high correlation between the result from the event identifying operation and the result from the identification based on analysis of pixels from captured image frames of the captured scene. The long-term identification process includes: identifying events in the captured scene by inputting registered camera processing data to the event identifying operation. The temporary identification process is then executed during a predetermined time period and the long-term identification process is executed after the predetermined initial time has expired.

公开(公告)号：US12229983B2

公开(公告)日：2025-02-18

申请号：US18244337

申请日：2023-09-11

Applicant: Axis AB

Inventor： Song Yuan ,  Ludvig Hassbring

IPC: G06K9/00 ,  G06T7/12 ,  G06T7/70 ,  G06V10/25 ,  G06V20/52

Abstract: A method includes detecting a first object in a first area of a scene; determining, based on characteristics of the first object, a first probability value indicating a first probability that the detected first object; detecting a second object in a second area of the scene captured in a second stream of image frames by a second camera of the camera system different from the first camera, wherein the second area at least partly overlaps the first area; determining, based on characteristics of the second object, a second probability value indicating a second probability that the detected second object; and when the second probability value is below a second threshold value and the first probability value is above a first threshold value determining an updated second probability value by increasing the second probability value.

公开(公告)号：US12056926B2

公开(公告)日：2024-08-06

申请号：US17498764

申请日：2021-10-12

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Song Yuan ,  Raphael Teller

IPC: G06V20/40 ,  G06V20/52 ,  H04N19/105 ,  H04N19/172 ,  H04N19/46 ,  H04N19/85

CPC classification number: G06V20/40 ,  G06V20/52 ,  H04N19/105 ,  H04N19/172 ,  H04N19/46 ,  H04N19/85

Abstract: A method for controlling video processing. A stream of images emanating from an image sensor is received. The contents of an image in the stream is evaluated. A part of the image stream, which part is antecedent the image being evaluated, is forwarded to a video encoder. Until the evaluation is complete, one or more empty frames are added at the end of an encoded image stream corresponding to the forwarded image stream.

公开(公告)号：US12047690B2

公开(公告)日：2024-07-23

申请号：US17498251

申请日：2021-10-11

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Song Yuan ,  Raphael Teller

IPC: H04N23/951 ,  H04N19/176 ,  H04N19/52 ,  H04N19/85

CPC classification number: H04N23/951 ,  H04N19/52 ,  H04N19/85 ,  H04N19/176

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：US11943453B2

公开(公告)日：2024-03-26

申请号：US17963707

申请日：2022-10-11

Applicant: Axis AB

Inventor： Song Yuan ,  Viktor Edpalm

IPC: H04N19/167 ,  H04N19/105 ,  H04N19/17 ,  H04N19/182 ,  H04N19/30 ,  H04N19/436 ,  H04N19/85

CPC classification number: H04N19/167 ,  H04N19/105 ,  H04N19/17 ,  H04N19/182 ,  H04N19/30 ,  H04N19/436 ,  H04N19/85

Abstract: The present disclosure relates to a method for encoding a video stream. The method comprising: acquiring pixel data of the video stream having a first resolution; extracting a crop corresponding to a region of interest from the pixel data of the video stream, the crop having the first resolution; down-scaling the pixel data of the video stream into a down-scaled video stream having a second resolution lower than the first resolution; processing the down-scaled video stream through one or more video processing operations; processing the crop through the one or more video processing operations; up-scaling the processed down-scaled video stream into an up-scaled video stream having the first resolution; merging the processed crop and the up-scaled video stream into a merged video stream; and encoding the merged video stream. The present disclosure further related to a video encoding device.

公开(公告)号：US11847765B2

公开(公告)日：2023-12-19

申请号：US17210555

申请日：2021-03-24

Applicant: Axis AB

Inventor： Song Yuan

IPC: G06T5/00 ,  G06T5/10 ,  G06T5/50 ,  H04N5/14 ,  H04N23/81

CPC classification number: G06T5/002 ,  G06T5/10 ,  G06T5/50 ,  H04N5/145 ,  H04N23/81

Abstract: The present disclosure relates to cameras and in particular methods for noise reduction in images captured by a camera, wherein a same perspective transform may be reused for performing temporal noise filtering on a plurality of images.

公开(公告)号：US11818367B2

公开(公告)日：2023-11-14

申请号：US17963707

申请日：2022-10-11

Applicant: Axis AB

Inventor： Song Yuan ,  Viktor Edpalm

IPC: H04N19/167 ,  H04N19/105 ,  H04N19/17 ,  H04N19/182 ,  H04N19/30 ,  H04N19/436 ,  H04N19/85

CPC classification number: H04N19/167 ,  H04N19/105 ,  H04N19/17 ,  H04N19/182 ,  H04N19/30 ,  H04N19/436 ,  H04N19/85

Abstract: The present disclosure relates to a method for encoding a video stream. The method comprising: acquiring pixel data of the video stream having a first resolution; extracting a crop corresponding to a region of interest from the pixel data of the video stream, the crop having the first resolution; down-scaling the pixel data of the video stream into a down-scaled video stream having a second resolution lower than the first resolution; processing the down-scaled video stream through one or more video processing operations; processing the crop through the one or more video processing operations; up-scaling the processed down-scaled video stream into an up-scaled video stream having the first resolution; merging the processed crop and the up-scaled video stream into a merged video stream; and encoding the merged video stream. The present disclosure further related to a video encoding device.

公开(公告)号：US20230298185A1

公开(公告)日：2023-09-21

申请号：US18172411

申请日：2023-02-22

Applicant: Axis AB

Inventor： Ludvig HASSBRING ,  Jessica Nilsson ,  Song Yuan

IPC: G06T7/20 ,  G06V20/52 ,  G06F21/62

CPC classification number: G06T7/20 ,  G06V20/52 ,  G06F21/6245 ,  G06T2207/10016

Abstract: A method of masking in an output image stream includes receiving an input image stream capturing a scene, processing the input image stream to generate the output image stream, including using a detector to detect objects in the scene and a tracker to track objects in the scene based on information provided by the detector, and further including to generate a particular output image of the output image stream by checking whether there exists a particular area in the scene in which an evaluation of a historical performance of the detector and/or tracker fulfills at least one condition, and to, if confirming that such a particular area exists, mask the particular area of the scene in the particular output image. A corresponding device, computer program, and computer program product are also provided.