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    • 2. 发明申请
    • CAMERA AUTO-FOCUS BASED ON EYE GAZE
    • 基于眼睛大眼睛的摄像机自动对焦
    • US20150003819A1
    • 2015-01-01
    • US13931527
    • 2013-06-28
    • Nathan AckermanAndrew C. GorisBruno Silva
    • Nathan AckermanAndrew C. GorisBruno Silva
    • G03B13/02
    • H04N5/23212G02B7/287G02B27/017G02B2027/0178G03B13/36H04N5/23219
    • Technology disclosed herein automatically focus a camera based on eye tracking. Techniques include tracking an eye gaze of eyes to determine a location at which the user is focusing. Then, a camera lens may be focused on that location. In one aspect, a first vector that corresponds to a first direction in which a first eye of a user is gazing at a point in time is determined. A second vector that corresponds to a second direction in which a second eye of the user is gazing at the point in time is determined. A location of an intersection of the first vector and the second vector is determined. A distance between the location of intersection and a location of a lens of the camera is determined. The lens is focused based on the distance. The lens could be focused based on a single eye vector and a depth image.
    • 本文所公开的技术基于眼睛跟踪自动对焦摄像机。 技术包括跟踪眼睛的目光凝视,以确定用户聚焦的位置。 然后,相机镜头可能会聚焦在该位置。 一方面,确定对应于使用者的第一只眼睛凝视时间点的第一方向的第一矢量。 确定对应于使用者的第二只眼睛注视时间点的第二方向的第二矢量。 确定第一矢量和第二矢量的交点的位置。 确定相交位置与照相机镜头位置之间的距离。 镜头根据距离进行聚焦。 镜头可以基于单个眼睛矢量和深度图像进行聚焦。
    • 10. 发明授权
    • Graphics frame buffer with RGB pixel cache
    • 具有RGB像素缓存的图形帧缓冲区
    • US5131080A
    • 1992-07-14
    • US632582
    • 1990-12-20
    • Robert W. FredricksonAndrew C. Goris
    • Robert W. FredricksonAndrew C. Goris
    • G09G5/02G09G5/06G09G5/36G09G5/39G09G5/397
    • G09G5/026G06F12/0875G09G5/06G09G5/363G09G5/397G09G2360/121G09G2360/122G09G2360/127
    • A graphics system uses a programmable tile size shape supported by a frame buffer memory organization wherein (X, Y) pixel addresses map into regularly offset permutations on groups of RAM address and data line assignments. This allows one RAM in each group to be accessed with a memory cycle in unison with one RAM in each other group, up to the number of groups. During such a memory cycle each RAM can receive a different address. A tile is the collection of pixel locations associated with a collection of addresses sent to the RAM's. Because of the regular nature of the permutations these locations may be regions bounded by a single boundary that may be rectangular and of varying size and shape. Changing the mapping of (X, Y) pixel addresses to RAM addresses for the groups changes the size and shape of the tiles. Tiles are cached. Tiles for RGB pixel are cached in an RGB cache, while Z values are cached in a separate cache. Caching allows the principle of locality to substitute shorter bit-cycles to the cache for memory cycles to the frame buffer, resulting in improved memory throughput.
    • 图形系统使用由帧缓冲存储器组织支持的可编程块大小形状,其中(X,Y)像素地址映射到RAM地址和数据线分配组上的定期偏移置换。 这允许每个组中的一个RAM与每个其他组中的一个RAM一致地与存储器周期一起访问,直到组的数量。 在这样的存储循环期间,每个RAM可以接收不同的地址。 瓦片是与发送到RAM的地址集合相关联的像素位置的集合。 由于排列的规则性质,这些位置可以是由单个边界限定的区域,该边界可以是矩形且具有变化的尺寸和形状。 将(X,Y)像素地址更改为组的RAM地址会更改图块的大小和形状。 瓷砖被缓存。 RGB像素的瓷砖缓存在RGB缓存中,而Z值则缓存在单独的高速缓存中。 缓存允许局部性的原理将较短的位周期替换到高速缓存用于帧缓冲器的存储器周期,从而提高存储器吞吐量。