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    • 5. 发明授权
    • Systems and methods for indexing presentation videos
    • 用于索引演示视频的系统和方法
    • US08280158B2
    • 2012-10-02
    • US12687790
    • 2010-01-14
    • John AdcockMatthew CooperLaurent DenoueHamed Pirsiavash
    • John AdcockMatthew CooperLaurent DenoueHamed Pirsiavash
    • G06K9/00
    • G06K9/00751
    • A system and method for identifying key frames of a presentation video that include stationary informational content. A sequence of frames is obtained from a presentation video and differences of pixel values between consecutive frames of the sequence of frames are computed. Sets of consecutive frames that are stationary are identified, wherein consecutive frames that are stationary have a proportion of changed pixel values below a first predetermined threshold, and wherein pixel values are deemed to be changed when the difference between the pixel values for corresponding pixels in consecutive frames exceeds a second predetermined threshold. Next, a set of key frames that include stationary informational content is retained. The set of key frames that include stationary informational content is then displayed for user interaction.
    • 一种用于识别包括固定信息内容的演示视频的关键帧的系统和方法。 从呈现视频获得帧序列,并且计算帧序列的连续帧之间的像素值的差异。 识别静止的连续帧的集合,其中静止的连续帧具有低于第一预定阈值的改变的像素值的比例,并且当连续的相应像素的像素值之间的差被认为改变像素值 帧超过第二预定阈值。 接下来,保留包括固定信息内容的一组关键帧。 然后显示包括固定信息内容的关键帧的集合以供用户交互。
    • 8. 发明申请
    • Systems and Methods for Instructional Video Navigation and Note Taking
    • 教学视频导航系统与方法及注意事项
    • US20140099071A1
    • 2014-04-10
    • US13647248
    • 2012-10-08
    • John AdcockScott CarterMatthew CooperLaurent Denoue
    • John AdcockScott CarterMatthew CooperLaurent Denoue
    • H04N9/87
    • H04N9/87H04N5/76H04N5/783H04N21/4334H04N21/44218H04N21/47217H04N21/8455H04N21/8456
    • A method for navigating instructional video presentations is disclosed. The method includes determining a pause mode of a video presentation, and playing the video presentation on a display device. The video presentation has one or more predetermined pause positions. The method also includes, while playing the video presentation, determining that the video presentation has reached one of the one or more pause positions. The method further includes, in accordance with a determination that the video presentation is in a first pause mode, pausing the video presentation at the one of the one or more pause positions and maintaining a display of a paused frame of the video presentation, and, in accordance with a determination that the video presentation is in a second pause mode distinct from the first pause mode, continuing to play the video presentation through the one of the one or more pause positions.
    • 公开了用于导航教学视频演示的方法。 该方法包括确定视频呈现的暂停模式,以及在显示装置上播放视频呈现。 视频呈现具有一个或多个预定的暂停位置。 该方法还包括在播放视频呈现时确定视频呈现已经达到一个或多个暂停位置中的一个。 所述方法还包括:根据所述视频呈现处于第一暂停模式的确定,暂停所述一个或多个暂停位置中的所述一个或多个暂停位置中的所述一个处的所述视频呈现,并且保持所述视频呈现的暂停帧的显示, 根据与第一暂停模式不同的第二暂停模式的确定,继续通过一个或多个暂停位置中的一个播放视频呈现。