会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Method for representing objects with concentric ring signature descriptors for detecting 3D objects in range images
    • 用于表示具有同心环签名描述符的对象的方法,用于检测范围图像中的3D对象
    • US08274508B2
    • 2012-09-25
    • US13026382
    • 2011-02-14
    • Fatih PorikliHien Nguyen
    • Fatih PorikliHien Nguyen
    • G06T15/00
    • G06K9/00214G06K9/6214
    • A 3D object is represented by a descriptor, wherein a model of the 3D object is a 3D point cloud. A local support for each point p in the 3D point cloud is located, and reference x, y, and z axes are generated for the local support. A polar grid is applied according to the references x, y, and z axes a along an azimuth and a radial directions on an xy plane centered on the point p such that each patch on the grid is a bin for a 2D histogram, wherein the 2D histogram is a 2D matrix F on the grid and each coefficient of the 2D matrix F corresponds to the patch on the grid. For each grid location (k, l), an elevation value F(k, l) is estimated by interpolating the elevation values of the 3D points within the patches to produce the descriptor for the point p.
    • 3D对象由描述符表示,其中3D对象的模型是3D点云。 定位在3D点云中的每个点p的本地支持,为本地支持生成参考x,y和z轴。 根据参考x,y和z轴a沿着位于点p上的xy平面上的方位角和径向方向施加极坐标网格,使得网格上的每个贴片是2D直方图的仓,其中, 2D直方图是网格上的2D矩阵F,2D矩阵F的每个系数对应于网格上的补丁。 对于每个网格位置(k,l),通过内插补片内的3D点的高程值来估计高程值F(k,l),以产生点p的描述符。
    • 10. 发明申请
    • Determining optimal access point locations for access points that perform automatic channel selection and automatic power adjustment
    • US20060094369A1
    • 2006-05-04
    • US11259864
    • 2005-10-27
    • Hien Nguyen
    • Hien Nguyen
    • H04B17/00
    • H04B17/382H04B17/345H04B17/354
    • An automatic channel selection (ACS) process enables an access point to determine a best channel available, i.e., the channel with a least amount of interference, for it operation. When ACS is enabled, the access point scans frequencies for all neighboring access points and their signal strengths. Based on this data, the access point then determines which frequency is least likely to be interfered with by these other access points. The access point switches itself to this frequency and begins operation. During normal operation, the access point may periodically rescan the air space and reevaluate its current operating channel. Preferably, every neighboring access point has its own channel, and the co-channel interference levels should be low enough so that there is a maximum coverage and high throughput for the network. If these characteristics cannot be achieved, the access point may then adjust its power automatically to reduce the interference level in the network. This automatic power adjustment (APA) feature preferably operates across a set of access points, each of which has the function. In this manner, the transmitting power of the neighboring access points in the wireless network is “cooperatively” adjusted to minimize the channel interference and maximize the coverage and throughput for the network. A method of determining optimal access point locations for access points that perform the ACS and APA functions is also described.