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    • 4. 发明授权
    • Total variational blind image restoration from image sequences
    • 图像序列的全变分盲图像恢复
    • US06470097B1
    • 2002-10-22
    • US09235998
    • 1999-01-22
    • Shang-Hong LaiYuntao Cui
    • Shang-Hong LaiYuntao Cui
    • G06K936
    • G06T5/003
    • A blind image restoration system uses total variational (TV) regularization to allow discontinuities in a true image function. The system first updates image blur parameters to minimize the energy function with the motion parameters and restored image. The motion parameters between subsequent frames in the image sequence are then updated to minimize the energy function with the blur parameters and restored image. The restored image is then updated by using a preconditioned conjugate gradient algorithm to minimize the energy function derived from the TV regularization formulation. The TV-based energy function is then computed by using the currently updated parameter values. If the relative difference between the current energy function value and the energy value computed in the previous iteration is within a threshold, then it is converged and the restored image is outputted. If it has not converged, the signal flows back to update the parameters.
    • 盲图像恢复系统使用全变分(TV)正则化来允许真实图像功能的不连续性。 系统首先更新图像模糊参数,以最小化运动参数和恢复图像的能量函数。 然后更新图像序列中后续帧之间的运动参数,以最小化具有模糊参数和恢复图像的能量函数。 然后通过使用预条件共轭梯度算法来更新恢复的图像,以使从TV正则化公式得出的能量函数最小化。 然后通过使用当前更新的参数值来计算基于TV的能量函数。 如果当前能量函数值与前一次迭代中计算出的能量值之间的相对差在阈值以内,则会被收敛并输出恢复的图像。 如果没有收敛,则信号流回来更新参数。
    • 5. 发明授权
    • Extracting textual information from a video sequence
    • 从视频序列中提取文本信息
    • US06587586B1
    • 2003-07-01
    • US08999903
    • 1997-06-12
    • Yuntao CuiQian Huang
    • Yuntao CuiQian Huang
    • G06K934
    • G06K9/325G06K9/6297G06K2209/15
    • A method for extracting an image representing textual information from a video sequence includes the following steps. First, receiving a sequence of video frames, each including an image of textual information. Then, locating the textual information in each frame of the video sequence to form a stack of text arrays, each array containing data representing substantially only the textual information. Finally, extracting a single textual image array representing the image of the textual information from the stack of text arrays. Apparatus for extracting an image representing textual information from a video sequence includes a source of a video sequence having a plurality of frames, each containing an image of the textual information; and a processor, coupled to the video sequence source, responsive to all of the plurality of frames, for generating a single array representing an image of the textual information.
    • 从视频序列提取表示文本信息的图像的方法包括以下步骤。 首先,接收一系列视频帧,每个视频帧包括文本信息的图像。 然后,将文本信息定位在视频序列的每个帧中以形成一组文本数组,每个数组包含基本上仅表示文本信息的数据。 最后,从文本堆栈中提取表示文本信息图像的单个文本图像数组。 用于从视频序列提取表示文本信息的图像的装置包括具有多个帧的视频序列的源,每个帧包含文本信息的图像; 以及处理器,耦合到所述视频序列源,响应于所述多个帧,用于生成表示所述文本信息的图像的单个阵列。