C. Ledig, L. Theis, F. Husz´ar, J. Caballero, A. Cunning- ham, A. Acosta, A. Aitken,
A. Tejani, J. Totz, Z. Wang, 2017, Photorealistic single image super-resolution using
a generative adversarial network, Proceedings of the IEEE conference on computer vision
and pattern recognition, pp. 4681-4690