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    • 7. 发明授权
    • Method for converting polygonal surfaces to levelsets
    • 将多边形表面转换为水平线的方法
    • US08264487B2
    • 2012-09-11
    • US12110963
    • 2008-04-28
    • Jonathan Cohen
    • Jonathan Cohen
    • G06T17/00
    • G06T13/40
    • A method for use in computer graphics includes receiving data defining an explicit surface representation of three-dimensional (3D) geometry and casting a ray into the explicit surface representation. For each point where the ray intersects the explicit surface, a direction of the ray is compared to a direction of a surface normal of the explicit surface at that point, and then a count is incremented or decremented based on a first rule that uses a result of the comparison at that point. Then, for one or more voxels corresponding to the ray, data is generated for each voxel that indicates the voxel is either inside or outside of the explicit surface based on a second rule that uses a value of the count at that voxel. Another method includes defining a narrow band of voxels near the explicit surface, and then for each voxel in the narrow band, approximating a distance between the voxel and a closest point on the explicit surface by assuming a set of two-dimensional (2D) distances associated with the voxel and a portion of the explicit surface form a triangle. For each voxel outside of the narrow band, a distance to a closest point on the explicit surface is approximated by interpolating the approximated distances in the narrow band.
    • 一种用于计算机图形学的方法包括接收定义三维(3D)几何的明确表面表示的数据,并将光线投射到显式表面表示中。 对于射线与显式表面相交的每个点,将光线的方向与该点处的显式表面的表面法线的方向进行比较,然后根据使用结果的第一条规则递增或递减计数 的比较。 然后,对于对应于射线的一个或多个体素,基于使用该体素的计数值的第二规则,为每个体素生成指示体素在显式表面的内部或外部的数据。 另一种方法包括在显式表面附近定义体素的窄带,然后对于窄带中的每个体素,通过假设一组二维(2D)距离来近似体素与显式表面上的最近点之间的距离 与体素相关联,并且显式表面的一部分形成三角形。 对于窄带外的每个体素,通过内插窄带中的近似距离来近似于显式表面上最接近点的距离。
    • 10. 发明授权
    • Method and system for assignment of fixed subscriber units in wireless local loop systems
    • 无线本地环路系统中固定用户单元的分配方法和系统
    • US06701152B1
    • 2004-03-02
    • US09415196
    • 1999-10-07
    • Jonathan CohenTanu AggarwalTadashi OhmoriMasahiro Mitsuzuka
    • Jonathan CohenTanu AggarwalTadashi OhmoriMasahiro Mitsuzuka
    • H04Q720
    • H04W48/20H04W84/14
    • Method of assigning a fixed subscriber unit (FSU) to communicate with a particular base station and a system including a plurality of wireless FSUs. The system includes a plurality of base stations, which are coupled to a telecommunications network. Each FSU is coupled to a subscriber communication device, and each FSU is configured to communicate wirelessly with at least a base station. The FSU measures signal strength of a set of base stations. The FSU sends a message with the measured signal strength of the set of base stations to a base station. Circuitry coupled to the base station determines at least a base station to which the FSU is to be assigned based on the message and additional information in the circuitry coupled to the base station. In response to the determining by the circuitry coupled to the base station, the base station sends to the FSU a message including the base station to which the FSU is to be assigned.
    • 分配固定用户单元(FSU)以与特定基站通信的方法和包括多个无线FSU的系统。 该系统包括耦合到电信网络的多个基站。 每个FSU耦合到订户通信设备,并且每个FSU被配置为与至少一个基站进行无线通信。 FSU测量一组基站的信号强度。 FSU向基站发送具有该组基站的测量信号强度的消息。 耦合到基站的电路基于消息以及耦合到基站的电路中的附加信息来确定至少要分配FSU的基站。 响应于耦合到基站的电路的确定,基站向FSU发送包括要分配FSU的基站的消息。