公开(公告)号：US11006148B2

公开(公告)日：2021-05-11

申请号：US16672546

申请日：2019-11-04

Applicant: Axis AB

Inventor： Song Yuan ,  Viktor Edpalm

IPC: G06K9/00 ,  H04N19/625 ,  H04N19/12 ,  H04N19/48

Abstract: The present invention relates to a method for adding a graphical object to image data of one or more image frames comprising a first image frame, the graphical object being added during encoding of the one or more image frames using an encoder, wherein the image data generator is converting the graphical object into a first set of discrete frequency transform, DFT, blocks each DFT block being associated with a position in the one or more image frames to which the DFT block corresponds. The encoder is performing DFT on a plurality of block of pixels of the first image frame, to output a second set of DFT blocks and then replacing a subset of DFT blocks of the second set of DFT blocks with the first set of DFT blocks according to the positions associated with the first set of DFT blocks.

公开(公告)号：US20200382699A1

公开(公告)日：2020-12-03

申请号：US16862913

申请日：2020-04-30

Applicant: Axis AB

Inventor： Johan Forberg ,  Hampus Linse ,  Song Yuan

IPC: H04N5/232 ,  H04N19/172 ,  H04N19/159 ,  H04N19/59

Abstract: A video processing comprises a video image processing pipeline and an encoder. The video image processing pipeline is processes images of captured video data and comprises: an image stream forming function which generates a first and second image streams each comprising a plurality of image frames, and an image stabilization function for image stabilizing the first image stream, thereby forming a stabilized image stream. The image stream forming function bypasses the second image stream from the image stabilization function, thereby forming an original image stream. The encoder encodes the stabilized image stream and the original image stream as a joint encoded image stream comprising encoded frames based on images frames from both the stabilized \the original image streams, wherein the joint encoded image stream comprises intra and inter frames, and wherein the intra frames are exclusively encoded based on image frames of the original image stream.

公开(公告)号：US10824872B2

公开(公告)日：2020-11-03

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 ,  G06K9/46 ,  G06N3/04 ,  H04N7/18 ,  G06N3/08

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：US10699377B2

公开(公告)日：2020-06-30

申请号：US16186188

申请日：2018-11-09

Applicant: Axis AB

Inventor： Song Yuan ,  Hampus Linse

IPC: G06K9/00 ,  G06T3/40 ,  H04N5/232 ,  H04N5/225

Abstract: There is provided a method for blending a first image and a second image having overlapping fields of view. The first and the second images are blended in a blending region. A width of the blending region is selected based on similarity between a first set of camera parameters used when capturing the first image and a second set of camera parameters used when capturing the second image such that the width decreases with increasing similarity.

公开(公告)号：US10674060B2

公开(公告)日：2020-06-02

申请号：US16178595

申请日：2018-11-02

Applicant: Axis AB

Inventor： Song Yuan

IPC: H04N7/18 ,  H04N5/232 ,  H04N5/272 ,  G08B29/04 ,  G08B13/196 ,  G08B25/08

Abstract: The present invention relates to allowing control of a monitoring camera, typically outside of what is supported by a video management system, to which the camera is connected. The camera overlays a pattern on the video stream representing a link to an action in a control interface for controlling the camera and an operator uses an operator controlled device, such as a mobile phone, to scan the pattern and perform the action to control the camera.

公开(公告)号：US10652523B2

公开(公告)日：2020-05-12

申请号：US16005128

申请日：2018-06-11

Applicant: Axis AB

Inventor： Toivo Henningsson ,  Song Yuan

IPC: H04N13/00 ,  H04N13/293 ,  G06T7/00 ,  G06T1/20 ,  H04N5/262 ,  H04N5/232 ,  H04N5/225

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：US10511769B2

公开(公告)日：2019-12-17

申请号：US15980392

申请日：2018-05-15

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Song Yuan ,  Alexandre Martins

IPC: H04N7/00 ,  H04N5/232 ,  H04N5/225

Abstract: A system comprising a video camera and a client device and a method performed therein. The video camera captures a plurality of images concurrently using a plurality of image sensors having partly overlapping fields of views. Overlapping portions of the images are identified, and the images are joined to generate a panorama image. When joining the images, image data is included from only one of the images in overlapping portions, and image data from the other images in the overlapping portions is ignored. The panorama image and the ignored image data is encoded and transmitted to the client device in an encoded video stream. The client device decodes the video stream and, if the client device is customized, it updates the panorama image in portions corresponding to overlapping portions of the plurality of images using the image data that was ignored by the video camera when generating the panorama image.

公开(公告)号：US20190340771A1

公开(公告)日：2019-11-07

申请号：US16351042

申请日：2019-03-12

Applicant: Axis AB

Inventor： Axel Keskikangas ,  Song Yuan

IPC: G06T7/246 ,  G06T3/40 ,  G06T5/00 ,  G06T5/50

Abstract: A method for detecting motion in a video sequence comprising distorted image frames is provided. The method comprises determining (101) a spatial resolution distribution for the distorted image frames; determining (102) a motion detection sensitivity map for the distorted image frames, the motion detection sensitivity map comprising areas having different motion detection sensitivity levels, wherein the motion detection sensitivity map is determined based on the spatial resolution distribution; and detecting (103) motion in the video sequence based on the motion detection sensitivity map. A motion detecting component and a camera including such a component is also disclosed.

公开(公告)号：US20190191105A1

公开(公告)日：2019-06-20

申请号：US16199790

申请日：2018-11-26

Applicant: Axis AB

Inventor： Song Yuan ,  Viktor Edpalm

IPC: H04N5/265 ,  H04N5/243 ,  H04N5/262 ,  H04N19/176 ,  H04N19/154 ,  H04N19/124

CPC classification number: H04N5/265 ,  H04N5/2258 ,  H04N5/243 ,  H04N5/2624 ,  H04N19/124 ,  H04N19/154 ,  H04N19/167 ,  H04N19/174 ,  H04N19/176 ,  H04N19/23 ,  H04N19/46 ,  H04N19/50 ,  H04N19/70 ,  H04N19/85

Abstract: A controller and method therein for controlling encoding of a set of images to enable blending of an overlapping area, where a first image and a second image overlap each other are disclosed. The controller encodes macroblocks of the non-overlapping area in the first image using a set of base quantization parameter values, QP-values, and adds the same set of base QP-values to a header of each macroblock. The controller encodes macroblocks of the overlapping area in the first image using a set of first QP values, and adds a modified set of the first QP-values to a header of each macroblock. The controller encodes macroblocks of the overlapping area in the second image using a set of second QP values, and adds a modified set of the second QP-values to a header of each macroblock.

公开(公告)号：US10142664B2

公开(公告)日：2018-11-27

申请号：US14958304

申请日：2015-12-03

Applicant: Axis AB

Inventor： Bjorn Ardo ,  Song Yuan

IPC: G06K9/46 ,  G06T7/20 ,  G06T7/73 ,  G06T7/90 ,  H04N21/234 ,  H04N21/431 ,  H04N21/24 ,  G06K9/62 ,  H04N21/61 ,  H04N21/242

Abstract: The present invention relates generally to video communication systems, and more specifically to a method and device for adjusting properties of a graphical overlay for a video stream, the adjusted properties being at least one of a position, a degree of animation and a color composition of the graphical overlay and the adjustment is based on a scene depicted by the time period of the video stream. The adjustment is performed if an estimated bitrate for transmitting an encoded bitstream comprising the time period of the video stream and the graphical overlay exceeds a predetermined upper threshold bitrate for transmitting an encoded single bitstream comprising the time period of the video stream and the graphical overlay.