Convolutional neural networks have recently demonstrated high-quality
reconstruction for single-image super-resolution. In this paper, we propose the
Laplacian Pyramid Super-Resolution Network (LapSRN) to progressively
reconstruct the sub-band residuals of high-resolution images. At each pyramid
level, our model takes coarse-resolution feature maps as input, predicts the
high-frequency residuals, and uses transposed convolutions for upsampling to
the finer level. Our method does not require the bicubic interpolation as the
pre-processing step and thus dramatically reduces the computational complexity.
We train the proposed LapSRN with deep supervision using a robust Charbonnier
loss function and achieve high-quality reconstruction. Furthermore, our network
generates multi-scale predictions in one feed-forward pass through the
progressive reconstruction, thereby facilitates resource-aware applications.
Extensive quantitative and qualitative evaluations on benchmark datasets show
that the proposed algorithm performs favorably against the state-of-the-art
methods in terms of speed and accuracy.

本文提出了 Laplacian Pyramid Super-Resolution Network 来逐步重建高分辨率图像的子带残差。我们的方法不需要双三次插值作为预处理步骤，从而大大减少了计算复杂度，并使用鲁棒的 Charbonnier 损失函数进行深度监督训练，取得了高质量的重建效果。我们的网络在一个前向传递过程中生成多尺度预测，从而有助于资源感知应用。在基准数据集上进行的广泛定量和定性评估表明，所提出的算法在速度和准确性方面优于现有技术方法。