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    Tile-based graphics
    1.
    发明授权
    Tile-based graphics 有权

    公开(公告)号：US11551326B2

    公开(公告)日：2023-01-10

    申请号：US15895115

    申请日：2018-02-13

    Applicant: Imagination Technologies Limited

    Inventor： Steven John Fishwick ,  John Howson

    IPC: G06T1/20 ,  G06F12/0815 ,  G06F12/0811 ,  G06T15/00 ,  G06T1/60 ,  G06F12/0875 ,  G06F12/0891 ,  G06F12/126 ,  G06F12/12

    Abstract: A tile-based graphics system has a rendering space sub-divided into a plurality of tiles which are to be processed. Graphics data items, such as parameters or texels, are fetched into a cache for use in processing one of the tiles. Indicators are determined for the graphics data items, whereby the indicator for a graphics data item indicates the number of tiles with which that graphics data item is associated. The graphics data items are evicted from the cache in accordance with the indicators of the graphics data items. For example, the indicator for a graphics data item may be a count of the number of tiles with which that graphics data item is associated, whereby the graphics data item(s) with the lowest count(s) is (are) evicted from the cache.

    Object tracking using momentum and acceleration vectors in a motion estimation system
    4.
    发明申请
    Object tracking using momentum and acceleration vectors in a motion estimation system 审中-公开
    在运动估计系统中使用动量和加速度向量的对象跟踪

    公开(公告)号：US20150348279A1

    公开(公告)日：2015-12-03

    申请号：US14823629

    申请日：2015-08-11

    Applicant: Imagination Technologies Limited

    Inventor： Steven John Fishwick ,  Stephen Morphet

    IPC: G06T7/20

    CPC classification number: H04N5/145 ,  G06T7/238 ,  G06T2207/10016

    Abstract: There is provided a method and apparatus for motion estimation in a sequence of video images. The method comprises a) subdividing each field or frame of a sequence of video images into a plurality of blocks, b) assigning to each block in each video field or frame a respective set of candidate motion vectors, c) determining for each block in a current video field or frame, which of its respective candidate motion vectors produces a best match to a block in a previous video field or frame, d) forming a motion vector field for the current video field or frame using the thus determined best match vectors for each block, and e) forming a further motion vector field by storing a candidate motion vector derived from the best match vector at a block location offset by a distance derived from the candidate motion vector. Finally, steps a) to e) are repeated for a video field or frame following the current video field or frame. The set of candidate motion vectors assigned at step b) to a block in the following video field or frame includes the candidates stored at that block location at step e) during the current video field or frame The method enables a block or tile based motion estimator to improve its accuracy by introducing true motion vector candidates derived from the physical behaviour of real world objects.

    Abstract translation: 提供了一种用于在视频图像序列中进行运动估计的方法和装置。 该方法包括：a）将视频图像序列的每个场或帧细分为多个块，b）向每个视频场或帧中的每个块分配相应的候选运动矢量集合，c）确定一个 当前视频场或帧，其相应的候选运动矢量中的哪一个产生与先前视频场或帧中的块最佳匹配，d）使用由此确定的最佳匹配向量为当前视频场或帧形成运动矢量场， 并且e）通过将从最佳匹配向量导出的候选运动矢量存储在偏移距离从候选运动矢量得到的距离的块位置处，形成另外的运动矢量场。 最后，针对当前视频场或帧之后的视频场或帧重复步骤a）至e）。 在步骤b）中分配给下一视频场或帧中的块的候选运动矢量集合包括在当前视频场或帧期间在步骤e）存储在该块位置处的候选。该方法启用基于块或块的运动估计器 通过引入从真实世界物体的物理行为导出的真实运动矢量候选来提高其精度。

    Object tracking using momentum and acceleration vectors in a motion estimation system
    5.
    发明授权
    Object tracking using momentum and acceleration vectors in a motion estimation system 有权

    公开(公告)号：US11240406B2

    公开(公告)日：2022-02-01

    申请号：US14823629

    申请日：2015-08-11

    Applicant: Imagination Technologies Limited

    Inventor： Steven John Fishwick ,  Stephen Morphet

    IPC: H04N5/14 ,  G06T7/238

    Abstract: There is provided a method and apparatus for motion estimation in a sequence of video images. The method comprises a) subdividing each field or frame of a sequence of video images into a plurality of blocks, b) assigning to each block in each video field or frame a respective set of candidate motion vectors, c) determining for each block in a current video field or frame, which of its respective candidate motion vectors produces a best match to a block in a previous video field or frame, d) forming a motion vector field for the current video field or frame using the thus determined best match vectors for each block, and e) forming a further motion vector field by storing a candidate motion vector derived from the best match vector at a block location offset by a distance derived from the candidate motion vector. Finally, steps a) to e) are repeated for a video field or frame following the current video field or frame. The set of candidate motion vectors assigned at step b) to a block in the following video field or frame includes the candidates stored at that block location at step e) during the current video field or frame The method enables a block or tile based motion estimator to improve its accuracy by introducing true motion vector candidates derived from the physical behaviour of real world objects.

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