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    • 92. 发明申请
    • AUTOMATIC CALIBRATION
    • 自动校准
    • US20130278779A1
    • 2013-10-24
    • US13451005
    • 2012-04-19
    • Wei Hong
    • Wei Hong
    • H04N17/00
    • H04N7/144H04N7/147H04N9/3179H04N9/3194
    • An automatic calibration method for a projector-camera system including a semi-transparent screen is disclosed herein. An image sequence is caused to be captured from the semi-transparent screen and through the semi-transparent screen while a calibration pattern having features is displayed and not displayed in an alternating succession on the semi-transparent screen. A temporal correlation image is created from the image sequence and a discrete binary signal. Peaks are identified in a spatial cross correlation image generated from the temporal correlation image, where a pattern of the identified peaks corresponds to a pattern of the features in the calibration pattern. The peaks are transformed to coordinates of corrected feature points. A comparison of the corrected feature points and a ground truth set of coordinates for the features is used to determine whether the projector-camera system is calibrated.
    • 本文公开了一种包括半透明屏幕的投影仪相机系统的自动校准方法。 使得在半透明屏幕上通过半透明屏幕捕获图像序列,同时显示具有特征的校准图案并且在半透明屏幕上不交替显示。 从图像序列和离散二进制信号创建时间相关图像。 在从时间相关图像生成的空间互相关图像中识别峰,其中所识别的峰的图案对应于校准图案中的特征的图案。 峰被转换为校正特征点的坐标。 使用校正的特征点和特征坐标的地面真值集的比较来确定投影仪 - 照相机系统是否被校准。
    • 93. 发明授权
    • Ghosting artifact reduction in temporal noise filtering
    • 时间噪声滤波中的鬼影神器减少
    • US08564724B2
    • 2013-10-22
    • US12753897
    • 2010-04-04
    • Wei HongHarmeet Singh
    • Wei HongHarmeet Singh
    • H04N5/00
    • H04N5/2176
    • A method of noise filtering of a digital video sequence to reduce ghosting artifacts, the method including computing motion values for pixels in a frame of the digital video sequence based on a reference frame, computing blending factors for the pixels based on the motion values, generating filtered output pixel values by applying the blending factors to corresponding pixel values in the reference frame and the frame, wherein selected filtered output pixel values are converged toward corresponding pixel values in the frame to reduce ghosting artifacts, and outputting the filtered frame.
    • 一种对数字视频序列进行噪声滤波以减少重影伪影的方法,所述方法包括基于参考帧计算数字视频序列的帧中的像素的运动值,基于运动值计算像素的混合因子,生成 通过将混合因子应用于参考帧和帧中的相应像素值,滤波后的输出像素值,其中选择的滤波输出像素值朝向帧中的相应像素值收敛以减少重影伪像,并输出滤波后的帧。
    • 95. 发明授权
    • Image-based path planning for automated virtual colonoscopy navigation
    • 基于图像的自动虚拟结肠镜检查导航路径规划
    • US08514218B2
    • 2013-08-20
    • US12190912
    • 2008-08-13
    • Wei HongGianluca Paladini
    • Wei HongGianluca Paladini
    • G06T15/00G06T15/40G06T17/00G06K9/00A61B5/05
    • A61B1/04
    • A method for automatic virtual endoscopy navigation, including: (a) using a fisheye camera to generate an endoscopic image and a depth image from a current position of the camera in lumen computed tomographic (CT) data; (b) segmenting a first region and a second region from the depth image, wherein the first region identifies a view direction of the camera and the second region is an area through which the camera can be moved without touching an inner surface of the lumen; (c) moving the camera from the current position, while pointing the camera in the view direction, to a next position in the second region; and (d) repeating steps (a-c) in sequence using the next position in step (c) as the current position in step (a).
    • 一种用于自动虚拟内窥镜导航的方法,包括:(a)使用鱼眼照相机在流明计算机断层摄影(CT)数据中从相机的当前位置产生内窥镜图像和深度图像; (b)从所述深度图像分割第一区域和第二区域,其中所述第一区域识别所述照相机的视图方向,并且所述第二区域是可以移动所述照相机而不接触所述内腔的内表面的区域; (c)在将相机指向视图方向的同时将相机从当前位置移动到第二区域中的下一个位置; 和(d)使用步骤(c)中的下一位置依次重复步骤(a-c)作为步骤(a)中的当前位置。
    • 97. 发明申请
    • EFFICIENT NETWORK DISCOVERY IN FREQUENCY HOPPING NETWORKS
    • 频繁搜索网络中有效的网络发现
    • US20130094536A1
    • 2013-04-18
    • US13272841
    • 2011-10-13
    • Jonathan W. HuiLik Chuen Alec WooWei Hong
    • Jonathan W. HuiLik Chuen Alec WooWei Hong
    • H04B1/713
    • H04B1/713
    • In one embodiment, a device in a frequency hopping communication network transmits responsive beacon messages based on adaptive types of responsive beacon message transmission based on a number of received beacon requests within a given time period: the number below a threshold results in synchronized unicast messages; the number above the threshold results in unsynchronized broadcast messages. In another embodiment, the device suppresses unsolicited beacon message transmission based on a density-aware redundancy count of other unsolicited beacon message transmissions from neighboring devices. In another embodiment, the device may transmit unsolicited beacon messages according to an adaptive interval based on stability of the network. In another embodiment, the device may suppress transmission of a beacon request to join the communication network based on a density-aware redundancy count of other beacon requests from neighboring devices, and transmits beacon requests at an adaptive interval that increases in response to each unanswered beacon request.
    • 在一个实施例中,跳频​​通信网络中的设备基于在给定时间段内的接收到的信标请求的数量,基于自适应类型的响应信标消息传输来发送响应信标消息:低于阈值的数量导致同步的单播消息; 超过阈值的数字导致不同步的广播消息。 在另一实施例中,设备基于来自相邻设备的其他未经请求的信标消息传输的密度感知冗余计数来抑制主动信标消息传输。 在另一个实施例中,设备可以基于网络的稳定性,根据自适应间隔发送未经请求的信标消息。 在另一个实施例中,设备可以基于来自相邻设备的其他信标请求的密度感知冗余计数来抑制加入通信网络的信标请求的传输,并以响应于每个未​​应答信标而增加的自适应间隔发送信标请求 请求。
    • 99. 发明申请
    • LINK RELIABILITY METRICS IN COMMUNICATION NETWORKS
    • 链路在通信网络中的可靠性度量
    • US20130028103A1
    • 2013-01-31
    • US13190859
    • 2011-07-26
    • Jonathan W. HuiLik Chuen Alec WooWei Hong
    • Jonathan W. HuiLik Chuen Alec WooWei Hong
    • H04L12/26
    • H04W74/0808H04W4/38H04W74/085H04W74/0891H04W84/18
    • In one embodiment, a transmitter in a communication network receives an indication of active transmission times of a receiver to which the transmitter attempts to reach with first transmissions, the active transmission times indicating respective times of second transmissions initiated by the receiver. Based on determining when the first transmissions occur, the transmitter may then compute a link reliability metric for a link from the transmitter to the receiver by excluding one or more of the first transmissions from the indicated active transmission times of the second transmissions. In one embodiment, the active transmission times are in the past and the reliability metric excludes any first transmissions in the past during those times, while in another embodiment the active transmission times are scheduled in the future and the reliability metric does not include any first transmissions since the first transmissions may be scheduled to avoid the active transmission times.
    • 在一个实施例中,通信网络中的发射机接收发射机尝试通过第一次传输到达接收机的主动传输时间的指示,主动传输时间指示由接收机发起的第二传输的相应时间。 基于确定何时发生第一传输,然后发射机可以通过从指示的第二传输的主动传输时间排除一个或多个第一传输来计算从发射机到接收机的链路的链路可靠性度量。 在一个实施例中,主动传输时间是过去的,并且可靠性度量在那些时间期间排除过去的任何第一传输,而在另一个实施例中,将来调度有效传输时间,并且可靠性度量不包括任何第一传输 因为可以调度第一传输以避免主动传输时间。