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1. 发明公开

EP2846548A1 MULTI-LEVEL BIDIRECTIONAL MOTION ESTIMATION METHOD AND DEVICE 审中-公开
标题翻译：多级双向运动估计方法和装置
公开(公告)号：EP2846548A1
公开(公告)日：2015-03-11
申请号：EP13834320.7
申请日：2013-09-25
申请人： Huawei Technologies Co., Ltd
发明人： WU, Xiaojun , YI, Benshun , XIAO, Jinsheng
IPC分类号： H04N19/00
CPC分类号： H04N7/014 , G06T7/238 , G06T2207/10016 , G06T2207/20021 , H04N5/145 , H04N19/132 , H04N19/142 , H04N19/176 , H04N19/194 , H04N19/55 , H04N19/553 , H04N19/577 , H04N19/587
摘要： Embodiments of the present invention provide a multi-level bidirectional motion estimation method and device. The method includes: searching for matched blocks in a current frame and a previous frame respectively by using M1×M1 blocks of a to-be-interpolated frame as a mirror center, where a algorithm for the search includes a three-dimensional recursive search algorithm or a hexagon search algorithm; determining a first to-be-determined matched block pair, where the first to-be-determined matched block pair is a pair of matched blocks with a minimum sum of binary absolute difference SBAD value among all pairs of matched blocks searched out in the current frame and the previous frame; and if it is determined that the SBAD value of the first to-be-determined matched block pair is greater than or equal to an SBAD threshold, splitting the M1×M1 blocks of the to-be-interpolated frame into M2×M2 blocks, and searching for matched blocks again in the current frame and the previous frame respectively by using the M2×M2 blocks of the to-be-interpolated frame as a mirror center, where an SBAD threshold for searching for the matched blocks again is 1/4 of the SBAD threshold applied in the previous time of searching for the matched blocks. Therefore, accuracy of motion estimation can be improved effectively, and image quality can be improved.
摘要翻译：本发明的实施例提供了一种多级双向运动估计方法和装置。该方法包括：以待插补帧的M1×M1个块为镜像中心，分别搜索当前帧和前一帧的匹配块，其中，搜索算法包括三维递归搜索算法或六边形搜索算法; 确定第一待确定匹配块对，其中第一待确定匹配块对是在当前搜索到的所有匹配块对中具有最小二元绝对差和SBAD值的匹配块对帧和前一帧; 若确定所述第一待判断匹配块对的SBAD值大于或等于SBAD阈值，则将所述待插值帧的M1×M1个块拆分为M2×M2个块，以待插补帧的M2×M2块为镜像中心分别在当前帧和前一帧中再次搜索匹配块，再次搜索匹配块的SBAD阈值为1/4 在上一次搜索匹配的块时应用的SBAD阈值。因此，可以有效地改善运动估计的准确性，并且可以改善图像质量。

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