期刊
IEEE ACCESS
卷 9, 期 -, 页码 71406-71417出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3077611
关键词
Training; Image edge detection; Interpolation; Image reconstruction; Deep learning; Encoding; Dictionaries; Deep learning; edge-preservation; MR imaging; residual network; stationary wavelet decomposition; super-resolution
资金
- Taif University, Taif, Saudi Arabia, through Taif University Researchers Supporting [TURSP-2020/115]
The paper introduces a MR image Super-Resolution method using a Very Deep Residual network in the training phase, which decomposes LR-HR image pairs into low-frequency and high-frequency subbands to enhance resolution. Experimental results show that this method outperforms existing methods in terms of objective metrics and subjective quality.
In this correspondence, we present an accurate Magnetic Resonance (MR) image Super-Resolution (SR) method that uses a Very Deep Residual network (VDR-net) in the training phase. By applying 2D Stationary Wavelet Transform (SWT), we decompose each Low Resolution (LR)-High Resolution (HR) example image pair into its low-frequency and high-frequency subbands. These LR-HR subbands are used to train the VDR-net through the input and output channels. The trained parameters are then used to generate residual subbands of a given LR test image. The obtained residuals are added with their LR subbands to produce the SR subbands. Finally, we attempt to maintain the intrinsic structure of images by implementing the Gaussian edge-preservation step on the SR subbands. Our extensive experimental results show that the proposed MR-SR method outperforms the existing methods in terms of four different objective metrics and subjective quality.
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