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    Fast and efficient multiprocessor implementation for exact for an exact cone beam image reconstruction
    2.
    发明授权
    Fast and efficient multiprocessor implementation for exact for an exact cone beam image reconstruction 失效
    快速高效的多处理器实现，用于精确的锥形束图像重建

    公开(公告)号：US5970111A

    公开(公告)日：1999-10-19

    申请号：US109266

    申请日：1998-06-30

    申请人： Supun Samarasekera ,  Frank Sauer ,  Kwok Tam ,  Ali R. Bani-Hashemi

    发明人： Supun Samarasekera ,  Frank Sauer ,  Kwok Tam ,  Ali R. Bani-Hashemi

    IPC分类号： A61B6/03 ,  G01N23/04 ,  G06T1/00

    CPC分类号： G01N23/046 ,  A61B6/027 ,  G01N2223/419 ,  Y10S378/901

    摘要： 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.

    摘要翻译： 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。

    Method and apparatus for orientating a camera
    4.
    发明授权
    Method and apparatus for orientating a camera 失效
    摄像机定位方法和装置

    公开(公告)号：US5475584A

    公开(公告)日：1995-12-12

    申请号：US386603

    申请日：1995-02-10

    申请人： Ali R. Bani-Hashemi

    发明人： Ali R. Bani-Hashemi

    IPC分类号： G01B11/26 ,  G05B13/02 ,  G06T7/00 ,  G06T7/60 ,  H04N5/232 ,  H04N7/18 ,  G05B19/18

    CPC分类号： G06T7/004 ,  G06T7/0018 ,  G06T7/002

    摘要： A method for recovering orientation of a camera or other apparatus with respect to a coordinate system, where the orientation corresponds to a set of first, second, and third orientation vectors, comprises projecting onto an image plane respective first, second, and third images of first, second, and third gratings respectively formed on first, second, and third mutually orthogonal supporting planes and having respective first, second, and third wavelength vectors. The supporting planes are aligned with respective ones of the first, second, and third orientation vectors such that the wavelength vectors are in predetermined relationship with the orientation vectors. The first, second, and third images are associated with respective first, second, and third image wavelength vectors. Thereafter, the image wavelength vectors are measured; the wavelength vectors are derived therefrom; and the orientation vectors are thereby derived.

    摘要翻译： 一种用于恢复相机或其他装置相对于坐标系的取向的方法，其中所述取向对应于一组第一，第二和第三取向向量，包括将相应的第一，第二和第三图像的第一，第二和第三图像投影到图像平面上， 分别形成在第一，第二和第三相互正交的支撑平面上并具有相应的第一，第二和第三波长矢量的第一，第二和第三光栅。 支撑平面与第一，第二和第三取向矢量中的相应平面对准，使得波长矢量与取向矢量处于预定关系。 第一，第二和第三图像与相应的第一，第二和第三图像波长矢量相关联。 此后，测量图像波长矢量; 从其中导出波长矢量; 从而导出取向向量。