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The Nonlocal p-Laplacian Evolution for Image Interpolation

机译:用于图像插值的非局部p-Laplacian演化

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摘要

This paper presents an image interpolation model with nonlocal p-Laplacian regularization. The nonlocal p-Laplacian regularization overcomes the drawback of the partial differential equation (PDE) proposed by Belahmidi and Guichard (2004) that image density diffuses in the directions pointed by local gradient. The grey values of images diffuse along image feature direction not gradient direction under the control of the proposed model, that is, minimal smoothing in the directions across the image features and maximal smoothing in the directions along the image features. The total regularizer combines the advantages of nonlocal p-Laplacian regularization and total variation (TV) regularization (preserving discontinuities and 1D image structures). The derived model efficiently reconstructs the real image, leading to a natural interpolation, with reduced blurring and staircase artifacts. We present experimental results that prove the potential and efficacy of the method.
机译:本文提出了具有非局部p-Laplacian正则化的图像插值模型。非局部p-Laplacian正则化克服了Belahmidi和Guichard(2004)提出的偏微分方程(PDE)的缺点,即图像密度沿局部梯度指向的方向扩散。在所提出的模型的控制下,图像的灰度值沿图像特征方向而不是梯度方向扩散,即,沿图像特征方向的最小平滑和沿图像特征方向的最大平滑。总正则化器结合了非局部p-Laplacian正则化和总变化(TV)正则化的优点(保留不连续性和一维图像结构)。派生的模型有效地重建了真实图像,从而导致了自然插值,同时减少了模糊和阶梯伪影。我们目前的实验结果证明了该方法的潜力和有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2011年第3期|p.1-11|共11页
  • 作者

    Yi Zhan;

  • 作者单位

    College of Mathematics and Statistics, Chongqing Technology and Business University, Chongqing 400067, China;

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  • 正文语种 eng
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