Temporal and spatial scaleable coding for video object planes
    4.
    发明授权
    Temporal and spatial scaleable coding for video object planes 失效
    视频对象平面的时间和空间可缩放编码

    公开(公告)号:US06057884A

    公开(公告)日:2000-05-02

    申请号:US869493

    申请日:1997-06-05

    摘要: Temporal and spatial scaling of video images including video object planes (VOPs) in an input digital video sequence is provided. Coding efficiency is improved by adaptively compressing scaled field mode video. Upsampled VOPs in the enhancement layer are reordered to provide a greater correlation with the input video sequence based on a linear criteria. The resulting residue is coded using a spatial transformation such as the DCT. A motion compensation scheme is used for coding enhancement layer VOPs by scaling motion vectors which have already been determined for the base layer VOPs. A reduced search area whose center is defined by the scaled motion vectors is provided. The motion compensation scheme is suitable for use with scaled frame mode or field mode video. Various processor configurations achieve particular scaleable coding results. Applications of scaleable coding include stereoscopic video, picture-in-picture, preview access channels, and ATM communications.

    摘要翻译: 提供了包括输入数字视频序列中的视频对象平面(VOP)的视频图像的时间和空间缩放。 通过自适应压缩缩放的视野模式视频来提高编码效率。 增强层中的上采样VOP被重新排序以基于线性准则提供与输入视频序列更大的相关性。 所得残留物使用诸如DCT的空间变换进行编码。 运动补偿方案用于通过缩放已经为基本层VOP确定的运动矢量来对增强层VOP进行编码。 提供了由缩放运动矢量定义其中心的缩小搜索区域。 运动补偿方案适用于缩放帧模式或场模式视频。 各种处理器配置实现特定可扩展的编码结果。 可缩放编码的应用包括立体视频,画中画,预览访问频道和ATM通信。

    Method for performing stereo matching to recover depths, colors and
opacities of surface elements
    8.
    发明授权
    Method for performing stereo matching to recover depths, colors and opacities of surface elements 失效
    执行立体匹配以恢复表面元素的深度,颜色和不透明度的方法

    公开(公告)号:US5917937A

    公开(公告)日:1999-06-29

    申请号:US843326

    申请日:1997-04-15

    IPC分类号: G06T7/00 H04N13/00 G06K9/00

    摘要: A stereo matching method simultaneously recovers disparities, colors and opacities from input images to reconstruct 3-dimensional surfaces depicted in the input images. The method includes formulating a general disparity space by selecting a projective sampling of a 3D working volume, and then mapping the input images into cells in the general disparity space. After computing statistics on the color samples at each cell, the method computes initial estimates of color and opacity from the statistics (e.g., the mean and variance of the color samples). The method uses opacity to compute visibility and then uses this visibility information to make more accurate estimates by giving samples not visible from a given camera less or no weight. The method uses the initial estimates as input to refining process which tries to match re-projected image layers to the input images.

    摘要翻译: 立体匹配方法同时从输入图像中恢复差异,颜色和不透明度,以重建输入图像中描绘的三维表面。 该方法包括通过选择3D工作量的投影采样,然后将输入图像映射到一般视差空间中的单元格来制定一般的差异空间。 在计算每个单元格上的颜色样本的统计数据之后,该方法根据统计信息计算颜色和不透明度的初始估计值(例如,颜色样本的平均值和方差)。 该方法使用透明度来计算可见度,然后使用该可见性信息来通过给予从给定的相机更少或没有重量而不可见的样本来进行更准确的估计。 该方法使用初始估计作为精炼过程的输入,其尝试将重新投影的图像层与输入图像相匹配。

    Liquid crystal display system
    9.
    发明授权
    Liquid crystal display system 失效
    液晶显示系统

    公开(公告)号:US5896116A

    公开(公告)日:1999-04-20

    申请号:US149361

    申请日:1993-11-09

    摘要: An eyewear type viewer having left and right LCD panels for the left and right eyes is arranged so that both LCD panels are driven and controlled by a single LCD drive circuit and a single timing control circuit, to reduce the weight and cost of the viewer. The timing control circuit controls the timings of the left and right LCD panels synchronously by sending a common timing control signal to both of the left and right panels, or controls the left and right panels individually by producing a first timing control signal for the left panel and a second timing control signal for the right panel. The timing control circuit may include a comparator which receives a composite control signal composed of a first component representing a write/hold signal, and a second component representing a quasi vertical synchronizing signal, and which separates the write/hold signal from the quasi vertical synchronizing signal.

    摘要翻译: 布置具有用于左眼和右眼的左右LCD板的眼镜型观察器,使得两个LCD面板由单个LCD驱动电路和单个定时控制电路驱动和控制,以减轻观看者的重量和成本。 定时控制电路通过向左右面板发出公共定时控制信号同时控制左右液晶显示面板的定时,或者通过产生左面板的第一定时控制信号来分别控制左右面板 以及用于右面板的第二定时控制信号。 定时控制电路可以包括比较器,其接收由表示写/保持信号的第一分量组成的复合控制信号,以及表示准垂直同步信号的第二分量,并且将写/保持信号与准垂直同步 信号。

    Method and apparatus for three-dimensional ultrasound imaging using
transducer array having uniform elevation beamwidth
    10.
    发明授权
    Method and apparatus for three-dimensional ultrasound imaging using transducer array having uniform elevation beamwidth 失效
    使用具有均匀的仰角波束宽度的换能器阵列的三维超声成像的方法和装置

    公开(公告)号:US5840032A

    公开(公告)日:1998-11-24

    申请号:US852264

    申请日:1997-05-07

    摘要: A method and an apparatus for three-dimensional imaging of ultrasound data by constructing projections of data from a volume of interest. An ultrasound scanner collects B-mode or color flow images in a cine memory, i.e., for a multiplicity of slices. A multi-row transducer array having a uniform elevation beamwidth is used to provide reduced slice thickness. In particular, the multi-row transducer array has a central row made up of elements having an area smaller than the combined area of the paired elements of two outermost rows The data from a respective region of interest for each of a multiplicity of stored slices is sent to a master controller, such data forming a volume of interest. The master controller performs an algorithm that projects the data in the volume of interest onto a plurality of rotated image planes using a ray-casting technique. The data for each projection is stored in a separate frame in the cine memory. These reconstructed frames are then displayed selectively by the system operator.

    摘要翻译: 一种用于通过构建来自感兴趣体积的数据的投影的超声数据的三维成像的方法和装置。 超声波扫描仪在电影存储器中收集B模式或彩色流图像,即多个切片。 使用具有均匀的仰角波束宽度的多行换能器阵列来提供减小的切片厚度。 特别地,多行换能器阵列具有由具有小于两个最外面行的成对元件的组合面积的元素组成的中心行。来自对于多个存储的切片中的每一个的相关感兴趣区域的数据是 发送到主控制器,这样的数据形成一个感兴趣的体积。 主控制器执行使用光线投射技术将感兴趣体积中的数据投影到多个旋转图像平面上的算法。 每个投影的数据存储在电影存储器中的单独帧中。 这些重建的帧然后由系统操作员选择性地显示。