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    EDITABLE VIDEO DATA SIGNED ON DECOMPRESSED DATA
    1.
    发明公开
    EDITABLE VIDEO DATA SIGNED ON DECOMPRESSED DATA 审中-公开

    公开(公告)号：US20240205426A1

    公开(公告)日：2024-06-20

    申请号：US18510996

    申请日：2023-11-16

    申请人： Axis AB

    发明人： Björn VÖLCKER ,  Stefan Lundberg

    IPC分类号： H04N19/176 ,  H04L9/32

    CPC分类号： H04N19/176 ,  H04L9/3247

    摘要： A signed video bitstream obtained by prediction coding of a video sequence includes data units and associated signature units, wherein each data unit represents one macroblock in a video frame. Each signature unit includes a digital signature of a bitstring derived from fingerprints, and each fingerprint has been computed from a macroblock reconstructed from one data unit associated with the signature unit. The bitstream is edited by: receiving a request to substitute a region; reconstructing a first set of macroblocks, in which said region is contained, and a second set of macroblocks referring to macroblocks in the first set; adding an archive object that includes fingerprints of the first set of macroblocks; editing the first set of data units and encoding them; re-encoding the second set of macroblocks; and adding the new data units to the signed video bitstream.

    Method and device for image analysis
    2.
    发明授权
    Method and device for image analysis 有权

    公开(公告)号：US11514582B2

    公开(公告)日：2022-11-29

    申请号：US17026321

    申请日：2020-09-21

    申请人： Axis AB

    发明人： Stefan Lundberg ,  Song Yuan

    IPC分类号： G06K9/00 ,  G06T7/20 ,  G06T7/194 ,  G06T7/70 ,  G06T5/20

    摘要： 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.

    METHOD FOR SEQUENTIAL CONTROL OF IR-FILTER, AND AN ASSEMBLY PERFORMING SUCH METHOD
    5.
    发明申请
    METHOD FOR SEQUENTIAL CONTROL OF IR-FILTER, AND AN ASSEMBLY PERFORMING SUCH METHOD 审中-公开

    公开(公告)号：US20180188634A1

    公开(公告)日：2018-07-05

    申请号：US15857077

    申请日：2017-12-28

    申请人： AXIS AB

    发明人： Stefan Lundberg ,  Jonas Hjelmström

    IPC分类号： G03B7/091 ,  G03B9/06

    CPC分类号： G03B7/091 ,  G03B7/095 ,  G03B9/06 ,  G03B11/00

    摘要： 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.

    CAMERA AND METHOD OF PRODUCING COLOR IMAGES
    6.
    发明申请
    CAMERA AND METHOD OF PRODUCING COLOR IMAGES 审中-公开

    公开(公告)号：US20180184054A1

    公开(公告)日：2018-06-28

    申请号：US15857127

    申请日：2017-12-28

    申请人： Axis AB

    发明人： Stefan Lundberg ,  Jonas Hjelmström

    IPC分类号： H04N9/07 ,  H04N5/33 ,  G02B5/20 ,  G02B7/00

    CPC分类号： H04N9/07 ,  G02B5/201 ,  G02B5/208 ,  G02B7/006 ,  G03B7/00 ,  G03B11/00 ,  H04N5/2254 ,  H04N5/332 ,  H04N5/3696

    摘要： 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.

    BIT RATE CONTROLLER AND A METHOD FOR LIMITING OUTPUT BIT RATE
    8.
    发明申请
    BIT RATE CONTROLLER AND A METHOD FOR LIMITING OUTPUT BIT RATE 审中-公开

    公开(公告)号：US20170169797A1

    公开(公告)日：2017-06-15

    申请号：US15374532

    申请日：2016-12-09

    申请人： Axis AB

    发明人： Stefan Lundberg

    IPC分类号： G09G5/10

    CPC分类号： G09G5/10 ,  G09G2320/0626 ,  H04N19/115 ,  H04N19/136 ,  H04N19/167 ,  H04N19/179 ,  H04N19/23 ,  H04N19/86

    摘要： 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.

    METHOD AND SYSTEM FOR GENERATING AN EVENT VIDEO SEQUENCE, AND CAMERA COMPRISING SUCH SYSTEM
    9.
    发明申请
    METHOD AND SYSTEM FOR GENERATING AN EVENT VIDEO SEQUENCE, AND CAMERA COMPRISING SUCH SYSTEM 审中-公开
    用于生成事件视频序列的方法和系统，以及包含该系统的摄像机

    公开(公告)号：US20160277759A1

    公开(公告)日：2016-09-22

    申请号：US15071654

    申请日：2016-03-16

    申请人： Axis AB

    发明人： Viktor Edpalm ,  Bjarne Rosengren ,  Jonas Holmberg ,  Stefan Lundberg

    IPC分类号： H04N19/57 ,  H04N5/917 ,  H04N19/107 ,  H04N19/114 ,  H04N19/593 ,  H04N19/177 ,  H04N19/433 ,  H04N19/44 ,  H04N19/46 ,  H04N19/162 ,  H04N19/137

    摘要： A method of generating an event video sequence is disclosed. 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. A system for generating an event video sequence is also disclosed, as well as a camera comprising such a system, and a computer program product with instructions adapted to carry out the method when executed by a processor.

    摘要翻译： 公开了一种产生事件视频序列的方法。 该方法包括接收编码成以图像组排列的图像帧序列的输入图像帧，每组图像具有GOP结构。 该方法还包括在先入先出缓冲器中存储图像帧的事件前序列，所述事件前序列具有第一预定GOP结构，在接收到事件通知时，从事件序列中检索事件序列 并且通过组合所述事件前序列和图像帧的事后序列来生成所述事件视频序列，所述后事件序列具有与所述第一GOP结构不同的第二GOP结构。 还公开了一种用于生成事件视频序列的系统，以及包括这种系统的照相机，以及具有适于在由处理器执行时执行该方法的指令的计算机程序产品。

    SYSTEM AND METHOD FOR ENCODING VIDEO CONTENT USING VIRTUAL INTRA-FRAMES
    10.
    发明申请
    SYSTEM AND METHOD FOR ENCODING VIDEO CONTENT USING VIRTUAL INTRA-FRAMES 有权
    使用虚拟框架编码视频内容的系统和方法

    公开(公告)号：US20150156511A1

    公开(公告)日：2015-06-04

    申请号：US14411324

    申请日：2013-06-26

    申请人： AXIS AB

    发明人： Stefan Lundberg

    IPC分类号： H04N19/593 ,  H04N19/587 ,  H04N19/59

    CPC分类号： H04N19/593 ,  G11B27/034 ,  H04N19/114 ,  H04N19/146 ,  H04N19/156 ,  H04N19/164 ,  H04N19/177 ,  H04N19/30 ,  H04N19/40 ,  H04N19/423 ,  H04N19/44 ,  H04N19/587 ,  H04N19/59 ,  H04N21/23406 ,  H04N21/23424 ,  H04N21/23439

    摘要： Systems and methods are provided for encoding raw image content encoded using one or more virtual intra-frames. In an exemplary method, a stream of video content may be encoded to generate compressed video data that includes an intra-frame and a plurality of corresponding inter-frames. The compressed video data may be stored within a buffer, and when the amount of data in the buffer exceeds a threshold value, a virtual intra-frame may be computed based on decoded inter-frame data. The virtual intra-frame may be output for storage in the buffer.

    摘要翻译： 提供了用于编码使用一个或多个虚拟帧内编码的原始图像内容的系统和方法。 在示例性方法中，视频内容流可以被编码以产生包括帧内和多个相应帧间的压缩视频数据。 压缩视频数据可以存储在缓冲器中，并且当缓冲器中的数据量超过阈值时，可以基于解码的帧间数据来计算虚拟帧内帧。 可以输出虚拟帧内以存储在缓冲器中。