On the Order of Convergence of Natural Cubic Spline Interpolation

1968 ◽  
Vol 5 (1) ◽  
pp. 89-101 ◽  
Author(s):  
Kendall E. Atkinson
2002 ◽  
Vol 6 (4) ◽  
pp. 73-80 ◽  
Author(s):  
Marco Congedo ◽  
Cem Özen ◽  
Leslie Sherlin

Author(s):  
Alasdair C. Steven ◽  
Robert Stall ◽  
Peter M. Steinert ◽  
Benes L. Trus

Powerful methods based on Fourier analysis have been devised for deducing the helical symmetries of macromolecular filaments and reconstructing their 3-dimensional density maps from electron images of negatively stained specimens. However, their applicability is restricted by the requirement that the particles be precisely straight. Only a limited number of specimens are sufficiently rigid to meet this constraint. Filamentous particles that exhibit varying degrees of flexibility constitute a much wider class of specimens, but their curvature impairs the coherence of their diffraction patterns. A solution to this problem is afforded by computational a posteriori straightening, effected by interpolating the digitized images on to a curvilinear coordinate system defined by the curve described by the particle axis. Here, we describe an algorithm for this purpose based on natural cubic spline interpolation, and illustrate its operation with model data and as applied to a flexuous biological specimen.


2019 ◽  
Vol 8 (4) ◽  
pp. 4014-4017

A novel time frequency analysis method was proposed by N.E.Huang known as Hilbert Huang Transform which, can be used for analyzing and processing real world signals. The Intrinsic Mode Functions (IMF) is the key part of this algorithm, in this part the empirically decomposed signal data points uses the cubic spline interpolation for connecting maximum and minimum points to connect lower and upper envelope of the processed signal. This paper presents the real time architecture for hardware implementation of natural cubic spline interpolation. The architecture of proposed cubic spline is using the properties of continuous cubic and linear polynomials. The experimental results showed that our proposed architecture gets better result than previous proposal implemented on Spartan 6 based FPGA board.


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