反投影

Super resolution, image reconstruction, iterative back projection algorithm, frequency domain motion estimation

超分辨率，图像重建，迭代反投影算法，频域运动估计

Key words: windows function; image reconstruction; convention back projection; fan beam scan model

通过实验，验证了基于窗函数的卷积反投影图像重建算法可以有效地提高重建图像的质量。

In order to improve the precision of registration algorithm and the quality of reconstructed image, an image registration method with sub-pixel precision is proposed, and super-resolution reconstruction is performed through iterative back projection algorithm.

提出了一种具有子像素级精度的图像配准方法，并通过迭代反投影算法进行超分辨率重建。

Finally, according to the movement information with sub-pixel precision gained by registration algorithms, super-resolution reconstruction is performed with iterative back projection algorithm.

最后，根据配准算法所得到的子像素级运动信息，用迭代反投影算法进行超分辨率重建。

In the experimentation, the circular measurement configuration combined with the filtered back projection algorithm,very high signal-to-noise ratio tomography images can be obtained.

实验中，通过旋转超声探测器进行数据采集，并利用滤波反投影算法重建图像，可得到高信噪比的光声层析图像。

The difference schema of the initial boundary value problem was converted to the step-by-step form,which was similar to the difference schema of the initial value problem.It is concluded that the difference schema satisfying the Von Neumann condition is a stable schema,and that,under the consistency condition,such stable schema is convergent.Moreover,with error estimate expression for the difference approximation to the classical solution,the linearity condition is unnecessary.

引入反投影算子将发展方程初边值问题的差分格式转化为与初值问题差分格式类似的逐步推进的形式，从而得出：满足Von Neumann条件的差分格式是稳定的格式；在相容条件下，差分格式若稳定(或满足VonNeumann条件)则格式收敛，且对古典解的差分逼近有误差估计式，不再需要线性的条件。

In this paper, a reconstruction method of Electrical Impedance Tomography which based on the method of equipotential back-projection is analyzed in detail.

本文分析了一种基于等位线反投影算法的电阻抗成像方法，并用虚拟仪器LabVIEW软件构建一个虚拟平台，实现了电阻抗成像的图像重建。

In this paper we studied filter backprojection algorithm and algebra iteractive algorithm of industrial CT image reconstruction.

本文研究了CT成像的常用算法：滤波反投影算法和代数迭代算法。

As the Jacobi Matrix of Fast One-Step Newton Error Reconstructor algorithm can be calculated previously t, the same imaging speed as back-projection algorithm can be made. The study results show that the FNOSER algorithm can obtain static image with a character of high space resolution, accurate orientation, fast imaging, and so on.

2基于牛顿法的一步误差重构算法对静态电阻抗成像技术进行了详细研究，推导出FNOSER 静态算法，快速牛顿一步误差重构算法其雅可比矩阵等可以事先计算好，从而可以获得和反投影算法类似的成像速度。

A final image is reconstructed by the filtered back-projection from appropriately combination of original sinogram and artifacts-tissue sinogram.

最后，通过融合&伪组织&图像的sinogram和原始CT图像的sinogram，得到校正的sinogram并采用滤波反投影重建算法完成金属伪影的CT校正图像。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。