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1. 发明授权

US07444002B2 Vehicular target acquisition and tracking using a generalized hough transform for missile guidance 有权
标题翻译：导弹目标采集和跟踪采用广义霍夫变换进行导弹引导
公开(公告)号：US07444002B2
公开(公告)日：2008-10-28
申请号：US10858741
申请日：2004-06-02
申请人： Hagos Teku , Thomas K. Lo , Nikki J. Lawrence
发明人： Hagos Teku , Thomas K. Lo , Nikki J. Lawrence
IPC分类号： G06K9/00 , F41G7/00
CPC分类号： G06K9/6205 , F41G7/008 , F41G7/2253 , F41G7/226 , F41G7/2293 , F41G7/346 , F41G7/36
摘要： A generalized Hough transform is used to acquire and track vehicular targets for missile guidance. This is accomplished by recognizing that most vehicles have silhouettes that may be described as a “rounded rectangle”. The position and shape of such rounded rectangles is described in terms of 5 parameters (xc, yc, a, b, θ) where xc, yc are the center coordinates, a,b are the major and minor axis and Θ is the orientation. The computation of a five dimensional Hough transform on an image including such a target will produce the five parameters that provide the “best fit” rounded rectangle to the target. These parameters are then passed to a missile tracker. This capability can be used to improve track gate handoff from the automatic target recognizer (ATR) to the missile tracker, changing aspect ratios of maneuvering targets, limited lock-on after launch (LOAL), aimpoint designation and fire control system to missile seeker handover.
摘要翻译：广义霍夫变换用于获取和跟踪导弹引导的车辆目标。这是通过认识到大多数车辆具有可被描述为“圆形矩形”的轮廓来实现的。这种圆形矩形的位置和形状用5个参数（x，c，y，c，a，b，θ）进行描述，其中x c = SUB>，yC c 是中心坐标，a，b是主轴和短轴，Theta是方向。包含这样的目标的图像上的五维霍夫变换的计算将产生为目标提供“最佳拟合”圆角矩形的五个参数。然后将这些参数传递给导弹跟踪器。该功能可用于提高从自动目标识别器（ATR）到导弹跟踪器的轨道切换，改变机动目标的纵横比，发射后的限制锁定（LOAL），瞄准点指定和火力控制系统到导弹探测器切换。

2. 发明授权

US06799138B2 Breaklock detection system and method 有权
标题翻译：断路器检测系统和方法
公开(公告)号：US06799138B2
公开(公告)日：2004-09-28
申请号：US10135158
申请日：2002-04-30
申请人： Nikki J. Lawrence , Thomas K. Lo , Joshua A. Whorf , Mark S. Moellenhoff
发明人： Nikki J. Lawrence , Thomas K. Lo , Joshua A. Whorf , Mark S. Moellenhoff
IPC分类号： G01P1500
CPC分类号： G01S13/723
摘要： A tracking system controls an aimed device (32) to keep it aimed at a target (34). A control system (10) determines when the tracker has lost its lock on the target (34) by comparing the target's instantaneous acceleration with its median acceleration. When the difference exceeds a predetermined threshold, the system searches backwards through a chronological buffer until it finds position data which antedate the receipt of inaccurate position data from the tracker. A second-order filter such as a Kalman filter is used to provide estimated target states. The difference between a time updated output from the second-order filter (16) and the present measured state from the tracking device is low pass filtered to provide a measurement of the instantaneous acceleration of the target. The buffer (20) stores position, velocity, and median acceleration values covering a span of time at least about twice as long as the time required to determine that a breaklock has occurred.
摘要翻译：跟踪系统控制目标装置（32）以使其瞄准目标（34）。控制系统（10）通过将目标的瞬时加速度与其中间加速度进行比较来确定跟踪器何时已经失去对目标（34）的锁定。当差异超过预定阈值时，系统通过时间缓冲器向后搜索，直到找到从跟踪器接收到不准确的位置数据的位置数据。使用诸如卡尔曼滤波器的二阶滤波器来提供估计的目标状态。来自二阶滤波器（16）的时间更新输出与来自跟踪装置的当前测量状态之间的差异被低通滤波，以提供目标的瞬时加速度的测量。缓冲器（20）存储覆盖时间跨度的位置，速度和中值加速度值至少为确定发生断路所需的时间的两倍多。

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