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    • 1. 发明授权
    • Motion vector searching method using plural search areas
    • 使用多个搜索区域的运动矢量搜索方法
    • US08073056B2
    • 2011-12-06
    • US11485362
    • 2006-07-13
    • Sung Deuk Kim
    • Sung Deuk Kim
    • H04B1/66
    • H04N5/145G06T7/207H04N19/53H04N19/57
    • A motion vector searching system and method estimates a motion vector during image compression by acquiring a present image frame and at least one previous image frame, generating low-resolution images of the present and previous frames in multiple stages, determining areas in one of the stages in which pixel searches are to be performed, locating at least two areas which overlap, and then merging the overlapping areas if a merge condition is satisfied. The search areas are determined by identifying candidate points in the low-resolution image which have low pixel absolute difference values, and the merge condition may correspond to a certain minimum distance between centers of the overlapping areas. A motion vector estimator is used to perform additional searching in the merged and non-merged areas to generate a motion vector associated with the present and previous image frames. Through at least the merging step, the motion vector searching system and method are able to achieve improved performance in terms of computational efficiency.
    • 运动矢量搜索系统和方法通过获取当前图像帧和至少一个先前图像帧来估计图像压缩期间的运动矢量,生成多个阶段的当前帧和先前帧的低分辨率图像,确定其中一个阶段中的区域 其中将执行像素搜索,定位至少两个重叠的区域,然后如果满足合并条件则合并重叠区域。 通过识别具有低像素绝对差值的低分辨率图像中的候选点来确定搜索区域,并且合并条件可以对应于重叠区域的中心之间的特定最小距离。 使用运动矢量估计器在合并和非合并区域中进行附加搜索以产生与当前和先前图像帧相关联的运动矢量。 通过至少合并步骤,运动矢量搜索系统和方法能够在计算效率方面实现改进的性能。