The super resolution of a very low resolution face image is a challenge task in computer vision, because it is difficult to learn a non-linear mapping of input-to-target space by deep neural network in one step upsampling. In this paper, we propose an asymptotic Residual Back-Projection Network (RBPNet) to gradually learn residual between the reconstructed face image and the ground truth by self-supervision mechanism. We map the reconstructed high-resolution feature map back to the original low-resolution feature space, use the original low-resolution feature map as a reference to self-supervising the learning of the various layers. The real high-resolution feature maps are approached gradually by iterative residual learning. Meanwhile, we explicitly reconstruct the edge map of face image and embed it into the reconstruction of high-resolution face image to reduce distortion of super-resolution results. Extensive experiments demonstrate the effectiveness and advantages of our proposed RBPNet qualitatively and quantitatively.
CITATION STYLE
Wang, X., Lu, Y., Chen, X., Li, W., & Wang, Z. (2019). RBPNET: An Asymptotic Residual Back-Projection Network for Super Resolution of Very Low Resolution Face Image. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 11954 LNCS, pp. 175–186). Springer. https://doi.org/10.1007/978-3-030-36711-4_16
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