access icon free Single Image Interpolation Using Texture-Aware Low-Rank Regularization

A new image interpolation method is proposed by using the image priors of nonlocal self-similarity and low rank approximation. Here the traditional cubicspline interpolation is conducted to obtain an initial High resolution (HR) image. The nonlocal similar image patches are vectorized to form data matrices with low rank prior, and thus a low rank regularization term is embedded into the reconstruction model. The texture information measured by entropy of the data matrix is extracted and used to achieve adaptive low rank approximation for retaining the latent fine details of image. The Split bregman iteration (SBI) algorithm and weighted Partial singular values thresholding (PSVT) method are adopted to obtain the optimum solution of the reconstruction model. Experimental results demonstrate the effectiveness of the proposed method in improving image quality in terms of Peak signal to noise ratio (PSNR) and/or Structural similarity (SSIM).

Inspec keywords: image texture; entropy; splines (mathematics); image reconstruction; iterative methods; approximation theory; image denoising; matrix algebra; image resolution; interpolation

Other keywords: SBI algorithm; Split Bregman iteration algorithm; nonlocal similar image patches; PSVT method; HR image; nonlocal self-similarity; texture-aware low-rank regularization; SSIM; texture information; image quality; weighted partial singular values thresholding method; reconstruction model; initial high resolution image; structural similarity; image priors; data matrix entropy; adaptive low rank approximation; PSNR; single image interpolation method; traditional cubic-spline interpolation; peak signal to noise ratio

Subjects: Linear algebra (numerical analysis); Computer vision and image processing techniques; Interpolation and function approximation (numerical analysis); Interpolation and function approximation (numerical analysis); Linear algebra (numerical analysis); Optical, image and video signal processing

http://iet.metastore.ingenta.com/content/journals/10.1049/cje.2017.08.025
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content/journals/10.1049/cje.2017.08.025
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