Abstract
Face hallucination is of great importance in many applications. In this paper, a novel two-stage framework is proposed for hallucinating high-resolution (HR) face image from the given low-resolution (LR) one. In contrast to the existing methods, where the finer details are ignored, our framework pays more attention to the further local details enhancement. In the first stage, the local position-patch-based method with locality constraint is introduced to obtain the initial estimate image. In order to generate more reasonable face image and reduce noise, our method only represents the input LR patches over the similar training patches in the same position. In the second stage, the initial estimate image rather than residual image is directly used as the input to obtain the final HR image via local position-patch-based method. Besides, contextual information of position-patch is taken into consideration to generate more precise details in the second stage. Extensive experiments on the open face database illustrate that the proposed method achieves superior performance in comparison with state-of-the-art methods.
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Acknowledgements
This work has been supported by National Natural Science Foundation of China (61203261; 61876099), China Postdoctoral Science Foundation funded project (2012M521335), Research Fund of Guangxi Key Lab of Multi-source Information Mining & Security (MIMS16-02), Shenzhen science and technology research and development funds (JCYJ20170307093018753) and The Fundamental Research Funds of Shandong University (2017JC043).
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Zhao, D., Chen, Z., Wu, Q.M.J. et al. Two-stage local details restoration framework for face hallucination. Machine Vision and Applications 30, 153–162 (2019). https://doi.org/10.1007/s00138-018-0983-2
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DOI: https://doi.org/10.1007/s00138-018-0983-2