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    • 7. 发明申请
    • IDENTIFYING A KEY FRAME FROM A VIDEO SEQUENCE
    • 从视频序列识别关键帧
    • US20130182767A1
    • 2013-07-18
    • US13825185
    • 2010-09-20
    • Xiaohui XieLike ZhuKongqiao WangYingfei Liu
    • Xiaohui XieLike ZhuKongqiao WangYingfei Liu
    • H04N7/26
    • G11B27/102G11B27/28H04N19/44H04N21/44008
    • An example apparatus is caused to receive a video sequence of a plurality of frames, and activate one of a plurality of available decoding processes based on a comparison of a size of the frames to a predefined threshold. The apparatus is also caused to select some but not all of the frames of the video sequence as potential key frames of the video sequence. The selected frames are located at or close to predefined positions along a length of the video sequence. The apparatus is also caused to decode the potential key frames according to the activated decoding process, and cause output of at least some of the potential key frames as key frames of the video sequence. The apparatus may be caused to discard from the potential key frames, one or more plain frames and/or a frame identified as being similar to other potential key frames.
    • 使得示例性装置接收多个帧的视频序列,并且基于将帧的大小与预定阈值的比较来激活多个可用解码处理中的一个。 该设备还被导致选择视频序列的一些但不是全部的帧作为视频序列的潜在关键帧。 所选择的帧位于或靠近视频序列的长度的预定位置。 该装置还根据激活的解码处理对潜在的关键帧进行解码,并且使至少一些潜在的关键帧的输出作为视频序列的关键帧。 可以使该装置从潜在的关键帧,一个或多个明确的帧和/或被识别为类似于其他潜在的关键帧的帧丢弃。
    • 10. 发明授权
    • Camera gestures for user interface control
    • 相机手势用于用户界面控制
    • US08269842B2
    • 2012-09-18
    • US12137202
    • 2008-06-11
    • Kongqiao WangLiang ZhangYuanchun Shi
    • Kongqiao WangLiang ZhangYuanchun Shi
    • H04N5/228
    • G06F3/017G06F3/0304G06F3/0346
    • A system and method for using images captured from a digital camera to control navigation through a three-dimensional user interface. The sequence of images may be examined to identify feature points to be tracked through successive frames of the images captured by the camera. A plurality of classifiers may be used to discern shift from rotation gestures, based on expected behavior of feature points in the image when the camera is shifted or rotated in position. The various classifiers may generate voting values for shift and rotation gestures, and the system can use historical gesture information to assist in categorizing a current gesture.
    • 一种用于使用从数码相机捕获的图像来控制通过三维用户界面的导航的系统和方法。 可以检查图像序列以识别通过由相机捕获的图像的连续帧来跟踪的特征点。 当照相机在位置移动或旋转时,可以使用多个分类器来基于图像中的特征点的预期行为来辨别从旋转手势的偏移。 各种分类器可以产生移动和旋转手势的投票值,并且系统可以使用历史手势信息来辅助对当前手势进行分类。