Parallel touch point detection using processor graphics
    12.
    发明授权
    Parallel touch point detection using processor graphics 有权
    使用处理器图形的并行触摸点检测

    公开(公告)号:US09448663B2

    公开(公告)日:2016-09-20

    申请号:US14129427

    申请日:2013-06-28

    Abstract: Technologies for touch point detection include a computing device configured to receive input frames from a touch screen, identify touch point centroids and cluster boundaries, and track touch points. The computing device may group cells of the input frame into blocks. Using a processor graphics, the computing device may dispatch one thread per block to identify local maxima of the input frame and merge centroids within a touch distance threshold. The computing device may dispatch one thread per centroid to detect cluster boundaries. The computing device may dispatch one thread per previously identified touch point to assign an identifier of a previously tracked touch point to a touch point within a tracking distance threshold, remove duplicate identifiers, and assign unassigned identifiers to closest touch points. The computing device may dispatch one thread per block to assign unique identifiers to each unassigned touch point. Other embodiments are described and claimed.

    Abstract translation: 用于触摸点检测的技术包括被配置为从触摸屏接收输入帧,识别触摸点中心和群集边界以及跟踪触摸点的计算设备。 计算设备可以将输入帧的单元分组成块。 使用处理器图形,计算设备可以每个块分派一个线程以识别输入帧的局部最大值,并在触摸距离阈值内合并质心。 计算设备可以调度每个质心一个线程来检测群集边界。 计算设备可以调度每个先前识别的触摸点的一个线程,以将跟踪的触摸点的标识符分配给跟踪距离阈值内的触摸点,去除重复的标识符,并将未分配的标识符分配给最接近的接触点。 计算设备可以每个块分派一个线程,以向每个未分配的触摸点分配唯一的标识符。 描述和要求保护其他实施例。

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