1) back projection
反投影
1.
The forward problem is solved by finite element method and the method of simple back projection is adopted to reconstruct the image.
本文给出了二维计算机模拟头模型；采用有限元方法进行正问题的求解，用简单反投影算法进行了图象的重建，成像结果与实际模型相近。
2.
In review of the "pseudo-lines" in direct projection image reconstructions, a new image reconstruction algorithm is proposed in the paper purporting to solve problems of ray back projections.
针对直接反投影重建的伪迹现象,提出了一种新型射线反投影重建算法,该方法基于反投影数据的“求交”运算,不同于常规反投影相叠加方法,可以较好地克服图像部分伪迹,仿真结果证明了该方法的有效性。
3.
It describes the finite element model of electrical capacitance tomography system for two phase flows and the numerical simulation method based on back projection algorithm.
描述了两相流成象电容层析系统的有限元模型和利用反投影法进行数值模拟的方法，对典型的层流状模型重建出流体成分分布图象。
2) backprojection
反投影
1.
When using filtered backprojection algorithm in the reconstruction, the choice of CT s Kernel is very important toimaging quality.
介绍X-CT滤波反投影重建算法中滤波核函数选择的简单原则,以及几种常用的滤波核函数,并对深圳安科公司ANOTOM-2000型CT重建算法中的滤波核函数进行了分析。
2.
To improve its reconstruction speed,a method combining symmetry with recursion technique to reduce backprojection calculation is presented.
为提高其重建速度,提出了一种利用对称性并结合递归技术的方法来减少该算法的反投影运算量。
3) back-projection
['bækprə,dʒekʃən]
反投影
1.
An improved back-projection algorithm for electrical impedance tomography
改进的电阻抗反投影成像算法
2.
In this thesis projection-address computation of reconstruction of 3D-cone beam CT has been studied, the reuse regularity of projection-address and back-projection weight has been found , a method of " 3D-cone beam CT fast reconstructioncomputation using cylinder coordination address mapping back-projection" has been realized, and the related data struct has been constructed.
本文对锥束3D-CT反投影过程的计算进行了深入研究。
4) back projection
反向投影
1.
Back Projection Imaging I、Q Realization of Impulse Signal SAR;
冲激信号SAR反向投影成像方法I、Q实现
2.
Wide-band synthetic aperture sonar data processing and image reconstruction with back projection algorithm;
采用反向投影算法进行宽带合成孔径声纳数据处理与图像重建
3.
A recursive back projection(BP) imaging algorithm is presented.
本文提出了一种冲激脉冲表层穿透雷达(Impulse Surface Penetrating Radar,简称ImpSPR)递归反向投影(Back Projection,简称BP)成像算法。
5) back projection
[自]反投影
6) Filter back-projection
滤波反投影
1.
The simulation results demonstrate that the boundary of an object,and the boundary and density of a flaw can be distinguished obviously by filter back-projection reconstruction using ρ-filter along the cone in the scanning mode of cone incidence of X-ray source.
对扁平构件的仿真结果表明:在射线源为锥束入射扫描方式下,通过分布在锥面上的ρ滤波器进行滤波反投影重建,得到的重建切片图像能够明显区分物体的边界及内部缺陷的边界和密度,空间分辨率可达到2 lp/mm,密度分辨率达到了1%,验证了该重建算法的可行性。
2.
Its projection data rebin pre-processing method and filter back-projection reconstruction algorithm were deduced.
为解决大尺寸构件快速ICT(Industrial Computed Tomography)成像问题,提出了一种通过检台2次偏置扩大扫描视场的ICT成像方法,并基于三代ICT投影数据存在的冗余特征,推导了它的投影数据重排预处理方法和滤波反投影(FBP,Filter Back-Projection)重建算法。
3.
The fan-beam filter back-projection algorithm is analyzed,and according to the characters of this algorithm,a method to accelerate the running speed of this algorithm is proposed.
介绍了由投影重建图像的基本原理,对扇束滤波反投影重建算法进行了分析,并针对该算法的特点提出了一种提高算法求解速度的方法。
补充资料：滤波反投影或卷积反投影
滤波反投影或卷积反投影
影像学术语。当代影像学设备进行影像重建的数学方法。在直接用扫描后所获得的投影轨迹剖面图反投影重建出的CT图像中，无法避免角度卷入条纹伪影(angular aliasing streaks)造成的模糊和失真。这种现象与被扫描层面的空间频率中高频信息的损失有关。使用一种精密的数学方法去除这种模糊。称为“展现”(unfolding)或去卷积(deconvolution)，即在反投影前使用一种数学的“滤器”或卷积函数对原始数据进行修正，然后再进行反投影。两步数学处理过程合称为滤波(修正后)反投影或卷积(后)反投影。这种方法的优点是处理过程简单，速度快，所得图像逼真、清晰。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条