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    • 25. 发明授权
    • Method and apparatus for motion estimation using block matching
    • 使用块匹配的运动估计的方法和装置
    • US5822007A
    • 1998-10-13
    • US591597
    • 1996-06-21
    • Michael KneeAndrew HackettMichael KerdranvatNadine Bolender
    • Michael KneeAndrew HackettMichael KerdranvatNadine Bolender
    • H04N7/01H04N5/14H04N7/26H04N7/36H04N7/46H04N7/12
    • H04N5/145H04N19/51H04N19/577
    • Block matching is well known as a robust and intuitively simple method of motion estimation for television pictures. However, when the purpose of the motion estimation is to provide accurate interpolation between images, conventional block matching suffers from the problem that the blocks are situated in the original fields rather than in the fields to be interpolated, leading to possible errors in the calculated motion field. The invention uses two-sided block matching. The search window is shared between the two input fields so that the candidate motion vectors related to be candidate pixel blocks all pass through the same points in the field to be interpolated. Thus, the "current block" becomes a notional area in the field to be interpolated, and each of the two search windows extends to half the maximum motion vector in each direction. Each motion vector points forward to the forward field by half its value and backward to the backward field by half its value. Two-sided block matching solves the positional error problem because the current blocks cover the interpolated field and are correctly placed in the interpolated field, and it solves the problem of gaps and conflicts because every point in the interpolated field has one motion vector assigned to it.
    • PCT No.PCT / EP94 / 02870 Sec。 371日期1996年2月9日 102(e)日期1996年2月9日PCT 1994年8月30日PCT PCT。 公开号WO95 / 07591 日期1995年3月16日嵌套匹配是众所周知的,用于电视图像的运动估计的鲁棒且直观简单的方法。 然而,当运动估计的目的是提供图像之间的精确插值时,传统的块匹配存在这样的问题:块位于原始场而不是待内插的场中,导致计算运动中的可能误差 领域。 本发明使用双面块匹配。 搜索窗口在两个输入字段之间共享,使得与候选像素块相关的候选运动矢量全部通过要插值的字段中的相同点。 因此,“当前块”成为要插值的字段中的概念区域,并且两个搜索窗口中的每一个延伸到每个方向上的最大运动矢量的一半。 每个运动矢量向前指向正向场的一半值,并向后指向后向域的一半值。 双面块匹配解决了位置误差问题,因为当前块覆盖内插场并被正确地放置在内插场中,并且解决了间隙和冲突的问题,因为内插场中的每个点都有一个分配给它的运动矢量 。