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arXiv · 2511.17232

Two kinds of parametric piecewise rational interpolation kernels for image magnification

Bing Guo·Wanfeng Qi
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Abstract

We study the constructions of piecewise rational interpolation kernels that are supported on the interval $[-2,2]$, and present one novel rational cubic/linear and five quartic/linear interpolation kernels. All proposed kernels are symmetric, $C^1$ continuous, and possess certain degrees of approximation order. The proposed quartic/linear interpolation kernels include the cubic and the cubic/linear interpolation kernel as special cases. Our numerical results show that one of the quartic/linear interpolation kernels can outperform the cubic interpolation kernel in terms of PSNR, SSIM, and FSIM.

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Bing Guo, Wanfeng Qi. 2025-11-21. Two kinds of parametric piecewise rational interpolation kernels for image magnification. https://arxiv.org/abs/2511.17232

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