Key frame selection
    1.
    发明授权
    Key frame selection 失效
    关键帧选择

    公开(公告)号:US08107015B1

    公开(公告)日:2012-01-31

    申请号:US08870836

    申请日:1997-06-06

    IPC分类号: H04N7/18

    CPC分类号: G11B27/28 H04N5/147

    摘要: A system and method that processes video to extract a keyframe-based adequate visual representation. The method utilizes a hierarchical processing technique. The first stage in the hierarchy extracts a chromatic difference metric from a pair of video frames. An initial set of frames is chosen based on the chromatic metric and a threshold. A structural difference measurement is extracted from this initial set of frames. A second threshold is used to select key frames from the initial set. The first and second thresholds are user selectable. The output of this process is the visual representation. The method is extensible to any number of metrics and any number of levels.

    摘要翻译: 一种处理视频以提取基于关键帧的足够视觉表示的系统和方法。 该方法采用分层处理技术。 层次中的第一阶段从一对视频帧中提取色差度量。 基于色度度量和阈值来选择一组初始帧。 从该初始帧组提取结构差异测量。 第二个阈值用于从初始集合中选择关键帧。 第一和第二阈值是用户可选择的。 该过程的输出是视觉表示。 该方法可扩展到任何数量的度量和任意数量的级别。

    SYSTEM AND METHOD FOR DETECTING SCENE CHANGES IN A DIGITAL VIDEO STREAM
    3.
    发明申请
    SYSTEM AND METHOD FOR DETECTING SCENE CHANGES IN A DIGITAL VIDEO STREAM 有权
    用于检测数字视频流中场景变化的系统和方法

    公开(公告)号:US20120128242A1

    公开(公告)日:2012-05-24

    申请号:US13361903

    申请日:2012-01-30

    IPC分类号: G06K9/68 G06K9/00

    CPC分类号: G11B27/28 H04N5/147

    摘要: A system and method that processes video to extract a keyframe-based adequate visual representation is disclosed. Certain embodiments utilize a hierarchical processing technique. A first stage in the hierarchy extracts a chromatic difference metric from a pair of video frames. An initial set of frames is chosen based on the chromatic metric and a threshold. A structural difference measurement is extracted from this initial set of frames. A second threshold is used to select key frames from the initial set. The first and second thresholds can be user selectable. The output of this process is the visual representation. The method is extensible to any number of metrics and any number of levels.

    摘要翻译: 公开了一种处理视频以提取基于关键帧的充分视觉表示的系统和方法。 某些实施例利用分层处理技术。 层次中的第一阶段从一对视频帧中提取色差度量。 基于色度度量和阈值来选择一组初始帧。 从该初始帧组提取结构差异测量。 第二个阈值用于从初始集合中选择关键帧。 第一和第二阈值可以是用户可选择的。 该过程的输出是视觉表示。 该方法可扩展到任何数量的度量和任意数量的级别。

    Method for detecting scene changes in a digital video stream
    4.
    发明授权
    Method for detecting scene changes in a digital video stream 失效
    用于检测数字视频流中的场景变化的方法

    公开(公告)号:US06738100B2

    公开(公告)日:2004-05-18

    申请号:US09742937

    申请日:2000-12-20

    IPC分类号: H04N718

    CPC分类号: G11B27/28 H04N5/147

    摘要: A system and method that processes video to extract a keyframe-based adequate visual representation. The method utilizes a hierarchical processing technique. The first stage in the hierarchy extracts a chromatic difference metric from a pair of video frames. An initial set of frames is chosen based on the chromatic metric and a threshold. A structural difference measurement is extracted from this initial set of frames. A second threshold is used to select key frames from the initial set. The first and second thresholds are user selectable. The output of this process is the visual representation. The method is extensible to any number of metrics and any number of levels.

    摘要翻译: 一种处理视频以提取基于关键帧的足够视觉表示的系统和方法。 该方法采用分层处理技术。 层次中的第一阶段从一对视频帧中提取色差度量。 基于色度度量和阈值来选择一组初始帧。 从该初始帧组提取结构差异测量。 第二个阈值用于从初始集合中选择关键帧。 第一和第二阈值是用户可选择的。 该过程的输出是视觉表示。 该方法可扩展到任何数量的度量和任意数量的级别。

    System and method for detecting scene changes in a digital video stream
    7.
    发明授权
    System and method for detecting scene changes in a digital video stream 有权
    用于检测数字视频流中的场景变化的系统和方法

    公开(公告)号:US08576342B2

    公开(公告)日:2013-11-05

    申请号:US13361903

    申请日:2012-01-30

    IPC分类号: H04N7/18

    CPC分类号: G11B27/28 H04N5/147

    摘要: A system and method that processes video to extract a keyframe-based adequate visual representation is disclosed. Certain embodiments utilize a hierarchical processing technique. A first stage in the hierarchy extracts a chromatic difference metric from a pair of video frames. An initial set of frames is chosen based on the chromatic metric and a threshold. A structural difference measurement is extracted from this initial set of frames. A second threshold is used to select key frames from the initial set. The first and second thresholds can be user selectable. The output of this process is the visual representation. The method is extensible to any number of metrics and any number of levels.

    摘要翻译: 公开了一种处理视频以提取基于关键帧的充分视觉表示的系统和方法。 某些实施例利用分层处理技术。 层次中的第一阶段从一对视频帧中提取色差度量。 基于色度度量和阈值来选择一组初始帧。 从该初始帧组提取结构差异测量。 第二个阈值用于从初始集合中选择关键帧。 第一和第二阈值可以是用户可选择的。 该过程的输出是视觉表示。 该方法可扩展到任何数量的度量和任意数量的级别。