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arXiv 1709.08321math.NAcs.NA
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有限差分在正反成像问题中的应用--MaxPol设计

Finite Differences in Forward and Inverse Imaging Problems--MaxPol Design

Mahdi S. Hosseini, Konstantinos N. Plataniotis

AI总结:

本文提出一种系统全面的有限脉冲响应(FIR)低通/全带导数核框架,通过最大平坦技术获得导数滤波器的闭式解,支持多种微分阶数、变量多项式精度及边界形式,通过分析导数矩阵的稳定性及在图像处理中的应用,验证其优越性。

摘要:

本文提出了一种系统且全面的有限脉冲响应(FIR)低通/全带导数核框架。通过最大平坦技术,获得了若干导数滤波器的闭式解,以调节未确定系数的傅里叶响应。该框架包括任意参数控制方法,可为多种微分阶数、变量多项式精度、集中/ staggered方案以及任意侧移节点的边界形式提供解决方案。利用所提出的框架,引入了四种不同的导数矩阵算子,并通过研究其在复平面中的特征值分布来分析其数值稳定性。通过考虑两个重要的图像处理问题,即梯度表面重建和图像拼接,研究了这些算子的实用性。实验表明,新的导数矩阵不仅优于常用方法,还为这两个应用中的数值问题提供了有用的见解。

英文摘要:

A systematic and comprehensive framework for finite impulse response (FIR) lowpass/fullband derivative kernels is introduced in this paper. Closed form solutions of a number of derivative filters are obtained using the maximally flat technique to regulate the Fourier response of undetermined coefficients. The framework includes arbitrary parameter control methods that afford solutions for numerous differential orders, variable polynomial accuracy, centralized/staggered schemes, and arbitrary side-shift nodes for boundary formulation. Using the proposed framework four different derivative matrix operators are introduced and their numerical stability is analyzed by studying their eigenvalues distribution in the complex plane. Their utility is studied by considering two important image processing problems, namely gradient surface reconstruction and image stitching. Experimentation indicates that the new derivative matrices not only outperform commonly used method but provide useful insights to the numerical issues in these two applications.

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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