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    • 3. 发明授权
    • Auto-triggered fast frame rate digital video recording
    • 自动触发快速帧速数字录像
    • US08830339B2
    • 2014-09-09
    • US12424309
    • 2009-04-15
    • Ruben M. VelardeSzepo Robert Hung
    • Ruben M. VelardeSzepo Robert Hung
    • H04N5/225H04N5/228H04N5/76H04N5/783H04N5/232H04N9/804
    • H04N5/232H04N5/783H04N9/8042
    • This disclosure describes techniques for triggering recording of digital video in a fast frame rate mode. In one example, a digital video recording apparatus includes a video sensor that captures digital video data at a fast frame rate in a fast frame rate mode, a video buffer that buffers the captured digital video data according to a first-in-first-out storage schema, a video storage that stores digital video data, and a motion detection unit that detects fast motion in the buffered digital video data, that stores digital video data from the video sensor in the video storage after detecting the fast motion, and that copies the contents of the video buffer to the video storage prepended to the stored video data. The digital video recording apparatus may be incorporated in a wireless communication device, such as a cellular phone.
    • 本公开描述了以快速帧速率模式触发数字视频记录的技术。 在一个示例中,数字视频记录设备包括以快速帧速率模式以快速帧速率捕获数字视频数据的视频传感器,根据先进先出缓冲所捕获的数字视频数据的视频缓冲器 存储模式,存储数字视频数据的视频存储器,以及检测缓冲数字视频数据中的快速运动的运动检测单元,其在检测到快速运动之后将来自视频传感器的数字视频数据存储在视频存储器中, 将视频缓冲器的内容提前到存储的视频数据。 数字视频记录装置可以结合在诸如蜂窝电话的无线通信装置中。
    • 6. 发明申请
    • Estimation of lighting conditions based on near-gray pixel detection using cylindrical boundaries
    • 基于使用圆柱边界的近灰度像素检测的照明条件的估计
    • US20070297011A1
    • 2007-12-27
    • US11473353
    • 2006-06-22
    • Szepo Robert HungYing Xie Noyes
    • Szepo Robert HungYing Xie Noyes
    • G06F15/00
    • H04N9/735H04N1/6027H04N1/6086
    • This disclosure describes image processing techniques that facilitate the determination of the lighting condition associated with an image. Once the lighting condition is determined, white balance can be performed on the image such as by applying white balance gains defined for the lighting condition. According to the techniques of this disclosure, gray point lines are defined and plotted for the different lighting conditions, and cylindrical bounding volumes are defined around the gray point lines, e.g., in a three-dimensional color space. The image is then analyzed with respect to each of the cylindrical bounding volumes to determine how many pixels of the image fall within the respective cylindrical bounding volumes formed around the gray point lines for the different lighting conditions. Based on this analysis, the actual lighting condition can be determined. The use of cylindrical bounding volumes can significantly improve the process of determining lighting conditions relative to conventional techniques.
    • 本公开描述了有助于确定与图像相关联的照明条件的图像处理技术。 一旦确定了照明条件,可以对图像执行白平衡,例如通过应用为照明条件定义的白平衡增益。 根据本公开的技术,为不同的照明条件定义和绘制灰点线,并且例如在三维颜色空间中围绕灰点线限定圆柱形界限体积。 然后相对于每个圆柱形界限体积分析图像,以确定图像的多少像素落在形成在不同照明条件下的灰点线周围的相应圆柱形界限体积内。 基于此分析,可以确定实际的照明条件。 与常规技术相比,使用圆柱形包围体积可显着改善确定照明条件的过程。
    • 10. 发明授权
    • Surface mesh matching for lens roll-off correction
    • 表面网格匹配用于镜头滚降校正
    • US08023758B2
    • 2011-09-20
    • US11835220
    • 2007-08-07
    • Szepo Robert HungJingqiang LiHsiang-Tsun LiXin Zhong
    • Szepo Robert HungJingqiang LiHsiang-Tsun LiXin Zhong
    • G06K9/40
    • G06T5/006G06T3/4007
    • A two-dimensional (2D) mesh is applied over a distortion surface to approximate a lens roll-off distortion pattern. The process to apply the 2D mesh distributes a plurality of grid points among the distortion pattern and sub-samples the distortion pattern to derive corrected digital gains at each grid location. Non-grid pixels underlying grid blocks having a grid point at each corner are adjusted based on the approximation of the lens roll-off for the grid points of the grid block. In one example, bilinear interpolation is used. The techniques universally correct lens roll-off distortion irregardless of the distortion pattern shape or type. The technique may also correct for green channel imbalance.
    • 将二维(2D)网格施加在失真表面上以近似透镜滚降失真图案。 应用2D网格的过程在失真模式中分配多个网格点,并对失真模式进行子采样,以在每个网格位置导出校正的数字增益。 基于网格块的网格点的镜头滚降的近似来调整在每个角上具有网格点的网格块下方的非网格像素。 在一个示例中,使用双线性插值。 这些技术无损于失真图案的形状或类型,普遍地校正镜头滚降。 该技术也可能纠正绿色通道不平衡。