XPixel Team: The architecture of the proposed efficient separable residual blocks (ESDB).

XPixel Team: The architecture of the proposed efficient separable residual blocks (ESDB).

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This paper reviews the NTIRE 2022 challenge on efficient single image super-resolution with focus on the proposed solutions and results. The task of the challenge was to super-resolve an input image with a magnification factor of $\times$4 based on pairs of low and corresponding high resolution images. The aim was to design a network for single ima...

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... block description. For further optimization, the blueprint separable convolution is adopted, which is an extremely efficient decomposition of the convolution, to replace the regular convolution in the proposed blueprint separable residual block (BSRB), as shown in Fig. 9. RFDN replaces the contrast-aware channel attention (CCA) layer with the enhanced spatial attention (ESA) block for better performance. Yet, it has been found that the channel-wise feature rescaling is effective for shallow SR models to boost reconstruction accuracy. Therefore, a channel weighting layer is involved in each ESDB for ...