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arXiv 1809.09673math.FA
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基于矩的改进Radon变换反演

Modified Radon transform inversion using moments

H. Choi, V. Ginting, F. Jafari, R. Mnatsakanov

摘要:

矩方法从Radon变换重建图像是自然和有用的。它们可以用来抑制噪声或其他虚假效应,并可以从相对较少的投影中获得高效的重建。本文利用卷积方法建立了一种修正Radon变换(MRT),并得到了它的反演公式。推导了Radon变换的矩与其修正Radon变换的矩之间的关系,并利用MRT数据对原密度函数进行了一致逼近。实现了重建算法,并从其修正Radon变换的矩重建了一个简单的密度函数。这种重建的数值收敛性示出同意推导的理论结果。

英文摘要:

Moment methods to reconstruct images from their Radon transforms are both natural and useful. They can be used to suppress noise or other spurious effects and can lead to highly efficient reconstructions from relatively few projections. We establish a modified Radon transform (MRT) via convolution with a mollifier and obtain its inversion formula. The relationship of the moments of the Radon transform and the moments of its modified Radon transform is derived and MRT data is used to provide a uniform approximation to the original density function. The reconstruction algorithm is implemented, and a simple density function is reconstructed from moments of its modified Radon transform. Numerical convergence of this reconstruction is shown to agree with the derived theoretical results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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