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    • 5. 发明授权
    • System and method for accuracy verification for image based surgical navigation
    • 基于图像的手术导航的准确性验证系统和方法
    • US09468412B2
    • 2016-10-18
    • US11767281
    • 2007-06-22
    • Mohamed Ali Hamadeh
    • Mohamed Ali Hamadeh
    • A61B5/05A61B6/12G06T7/60A61B5/06
    • A61B6/12A61B5/06A61B5/062G06T7/60
    • Certain embodiments of the present invention provide for a system and method for assessing the accuracy of a surgical navigation system. The method may include acquiring an X-ray image that captures a surgical instrument. The method may also include segmenting the surgical instrument in the X-ray image. In an embodiment, the segmenting may be performed using edge detection or pattern recognition. The distance between the predicted location of the surgical instrument tip and the actual location of the surgical instrument tip may be computed. The distance between the predicted location of the surgical instrument tip and the actual location of the surgical instrument tip may be compared with a threshold value. If the distance between the predicted location of the surgical instrument tip and the actual location of the surgical instrument tip is greater than the threshold value, the user may be alerted.
    • 本发明的某些实施例提供了用于评估外科导航系统的准确性的系统和方法。 该方法可以包括获取捕获外科器械的X射线图像。 该方法还可以包括在X射线图像中分割外科器械。 在一个实施例中,可以使用边缘检测或模式识别来执行分割。 可以计算手术器械尖端的预测位置与外科器械尖端的实际位置之间的距离。 手术器械尖端的预测位置与外科器械尖端的实际位置之间的距离可以与阈值进行比较。 如果手术器械尖端的预测位置与手术器械尖端的实际位置之间的距离大于阈值,则可以警告用户。
    • 9. 发明申请
    • Method and System for Adaptive Interpolation in Digital Video Coding
    • 数字视频编码中自适应插值的方法与系统
    • US20120134425A1
    • 2012-05-31
    • US13286828
    • 2011-11-01
    • Faouzi KossentiniNader MahdiMohamed-Ali Ben AyedHassen GuermaziMichael Horowitz
    • Faouzi KossentiniNader MahdiMohamed-Ali Ben AyedHassen GuermaziMichael Horowitz
    • H04N7/26
    • H04N19/523H04N19/117H04N19/137H04N19/186H04N19/463
    • Disclosed are techniques for adaptive interpolation filtering of luminance and chrominance samples in the context of motion compensation in video encoding or decoding. A two-dimensional interpolation filter of n×m coefficients may be separable, i.e., it may be separated into two one-dimensional filters with m and n coefficients, respectively. The bitstream may include, per video unit and sub-sample position, information indicating whether to use a newly-generated, a cached, or a default filter that may be a separable two-dimensional filter. The information may be structured in a way that takes advantage of the two-dimensional filter being separable. When a newly-generated filter is signalled, the bitstream may contain information pertaining to the characteristics of the newly-generated filter, such as its coefficients. A decoder may fetch this information from the bitstream to create the filters which are applied to samples of the video unit. An encoder may create a bitstream as described.
    • 公开了用于在视频编码或解码中的运动补偿的上下文中的亮度和色度样本的自适应插值滤波的技术。 n×m个系数的二维内插滤波器可以是可分离的,即它可以分别分成具有m和n个系数的两个一维滤波器。 比特流可以包括每个视频单元和子样本位置,指示是否使用可能是可分离二维滤波器的新生成的,高速缓存的或默认滤波器的信息。 信息可以以利用二维过滤器可分离的方式构造。 当新产生的滤波器被通知时,比特流可以包含与新生成的滤波器的特性有关的信息,例如其系数。 解码器可以从比特流获取该信息以创建应用于视频单元的采样的滤波器。 编码器可以创建如所描述的比特流。