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    • 34. 发明申请
    • Moving Target Detection in the Presence of Parallax
    • 在视差存在下移动目标检测
    • US20080089556A1
    • 2008-04-17
    • US11763559
    • 2007-06-15
    • Garbis SalgianSupun SamarasekeraJiangjian XiaoJames BergenRakesh KumarFeng Han
    • Garbis SalgianSupun SamarasekeraJiangjian XiaoJames BergenRakesh KumarFeng Han
    • G06K9/00
    • G06K9/3241G06K9/209G06T7/285G06T2207/10021G06T2207/30212G06T2207/30252
    • A method for detecting a moving target is disclosed that receives a plurality of images from at least one camera; receives a measurement of scale from one of a measurement device and a second camera; calculates the pose of the at least one camera over time based on the plurality of images and the measurement of scale; selects a reference image and an inspection image from the plurality of images of the at least one camera; and detects a moving target from the reference image and the inspection image based on the orientation of corresponding portions in the reference image and the inspection image relative to a location of an epipolar direction common to the reference image and the inspection image; and displays any detected moving target on a display. The measurement of scale can derived from a second camera or, for example, a wheel odometer. The method can also detect moving targets by combining the above epipolar method with a method based on changes in depth between the inspection image and the reference image and based on changes in flow between the inspection image and the reference image.
    • 公开了一种用于检测移动目标的方法,其从至少一个相机接收多个图像; 从测量装置和第二相机中的一个接收刻度的测量; 基于多个图像和尺度的测量来计算随时间的至少一个相机的姿态; 从所述至少一个照相机的多个图像中选择参考图像和检查图像; 并且基于所述参考图像和所述检查图像中的对应部分相对于所述参考图像和所述检查图像共同的核极方向的位置的取向,从所述参考图像和所述检查图像中检测移动目标; 并在显示器上显示任何检测到的移动目标。 刻度的测量可以从第二相机或例如车轮里程表得到。 该方法还可以通过将上述对极方法与基于检查图像和参考图像之间的深度变化的方法并基于检查图像与参考图像之间的流动变化组合来检测移动目标。
    • 39. 发明授权
    • Fast and efficient multiprocessor implementation for exact for an exact
cone beam image reconstruction
    • 快速高效的多处理器实现,用于精确的锥形束图像重建
    • US5970111A
    • 1999-10-19
    • US109266
    • 1998-06-30
    • Supun SamarasekeraFrank SauerKwok TamAli R. Bani-Hashemi
    • Supun SamarasekeraFrank SauerKwok TamAli R. Bani-Hashemi
    • A61B6/03G01N23/04G06T1/00
    • G01N23/046A61B6/027G01N2223/419Y10S378/901
    • A computed tomographic imaging apparatus performs three-dimensional (3D) image reconstruction of a region of interest of an object using a plurality of processors for processing successive sets of cone beam measurement data that are acquired by scanning about the object with a cone beam radiation source and an area detector. A central memory has stored therein a plurality of subsets of pre-calculated image processing information, and the plurality of processors are responsive to a given sequence of successive ones of the subsets of pre-calculated image processing information for converting the cone beam measurement data to Radon derivative data on a plurality of Radon .phi.-planes. In a preferred embodiment each of the processors has a first input coupled for receiving in a broadcast manner the successive sets of cone beam measurement data, and a second input coupled for receiving the subsets of pre-calculated image processing information in a given sequence so that each one of the plurality of processors converts the cone beam measurement data broadcast to its second input into Radon derivative data for a respective subset of the Radon .phi.-planes.
    • 计算机断层成像装置使用多个处理器来执行对象的感兴趣区域的三维(3D)图像重构,以处理通过用锥束辐射源扫描关于物体的连续的锥束测量数据集合 和区域检测器。 中央存储器在其中存储有多个预先计算的图像处理信息的子集,并且多个处理器响应于预先计算的图像处理信息的子集中的连续的子集的给定序列,用于将锥形束测量数据转换为 氡衍生数据在多个氡气平面上。 在优选实施例中,每个处理器具有耦合的第一输入,用于以广播方式接收连续的锥形束测量数据集合,以及耦合用于以给定序列接收预先计算的图像处理信息的子集的第二输入,使得 多个处理器中的每个处理器将锥形束测量数据广播转换成其第二输入,用于Radon扇形板的相应子集的Radon导数数据。
    • 40. 发明授权
    • Two-step radon inversion processing for .phi.-planes having local radon
origins
    • 具有局部氡起源的电极的两步骤氡反演处理
    • US5901195A
    • 1999-05-04
    • US940324
    • 1997-09-30
    • Frank SauerSupun SamarasekeraKwok Tam
    • Frank SauerSupun SamarasekeraKwok Tam
    • G01N23/04A61B6/03G06F17/14G06T1/00G06T11/00
    • G06T11/006A61B6/027G06T2211/421Y10S378/901
    • A two-step 3D Radon inversion processor for processing Radon data on a set of vertically oriented co-axial .phi.-planes that partition Radon space, wherein each of the .phi.-planes is sampled during the processing so as to have its own independent local Radon origin. In accordance with further principles of the present invention, a 3D Radon data generator generates Radon data on a set of vertically oriented co-axial .phi.-planes that partition Radon space, wherein each of the .phi.-planes is sampled so as to have its own independent local Radon origin, and a two-step 3D Radon inversion processor independently processes each of the .phi.-planes. Any shift of the local Radon origins with respect to a global coordinate system is compensated for during the 3D Radon inversion processing. Compensation for the origin shift may be made during or after a first step of the Radon inversion processing.
    • 一种两步3D氡反演处理器,用于处理一组垂直定向的同轴电极上的Radon数据,分配Radon空间,其中每个phi-plane在处理期间被采样,以便拥有自己的独立的本地Radon 起源。 根据本发明的进一步原理,3D氡数据发生器在分配氡空间的一组垂直取向的同轴电极上产生氡数据,其中每个电极被采样以具有其自己的 独立的本地Radon起源,并且两步骤3D Radon倒置处理器独立地处理每个phi-plane。 相对于全局坐标系的本地氡原点的任何偏移在3D氡反演处理期间被补偿。 原点偏移的补偿可以在Radon反转处理的第一步骤期间或之后进行。