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DOI: 10.14569/IJACSA.2022.0130337
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A Cubic B-Splines Approximation Method Combined with DWT and IBP for Single Image Super-resolution

Author 1: Victor Kipkoech Mutai
Author 2: Elijah Mwangi
Author 3: Ciira wa Maina

International Journal of Advanced Computer Science and Applications(IJACSA), Volume 13 Issue 3, 2022.

  • Abstract and Keywords
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Abstract: The process of converting low-resolution images into high-resolution images by removing noise and estimating high-frequency information is known as image super-resolution. Aliased and decimated versions of the actual scenes are considered low-resolution images. The edges of high-resolution images produced by super-resolution from a single image are typically blurred. This paper proposes an approach to generate high-resolution image with sharp edges by combining a cubic B-Splines approximation, a discrete wavelet transform (DWT), and an iterative back-projection (IBP) edge-preserving weighted guided filter. A two-stage cubic B-Splines approximation, which includes pre-filtering and interpolation, is employed to up-sample the low-resolution image. The pre-filtering approach is used to transform pixel values to B-Splines coefficients. This approach minimizes blurring in the up-sampled image. The lost high-frequency information is then estimated using a one-level discrete wavelet transform based on the db1 wavelet. Finally, using a weighted guided filter, the resulting image is subjected to back-projection to obtain a high-resolution image. The proposed single-image super-resolution approach is applied on RGB colour images. The proposed method outperforms other selected approaches for comparison objectively in terms of PSNR and SSIM and also in visual quality.

Keywords: Single-image super-resolution; pre-filtering; cubic B-Splines approximation; discrete wavelet transform (DWT); iterative back-projection (IBP); B-Splines coefficients

Victor Kipkoech Mutai, Elijah Mwangi and Ciira wa Maina, “A Cubic B-Splines Approximation Method Combined with DWT and IBP for Single Image Super-resolution” International Journal of Advanced Computer Science and Applications(IJACSA), 13(3), 2022. http://dx.doi.org/10.14569/IJACSA.2022.0130337

@article{Mutai2022,
title = {A Cubic B-Splines Approximation Method Combined with DWT and IBP for Single Image Super-resolution},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2022.0130337},
url = {http://dx.doi.org/10.14569/IJACSA.2022.0130337},
year = {2022},
publisher = {The Science and Information Organization},
volume = {13},
number = {3},
author = {Victor Kipkoech Mutai and Elijah Mwangi and Ciira wa Maina}
}



Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

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