They reference this paper: https://github.com/microsoft/Bringing-Old-Photos-Back-to-Life https://github.com/microsoft/Bringing-Old-Photos-Back-to-Lif... For wh

They reference this paper: https://github.com/microsoft/Bringing-Old-Photos-Back-to-Life https://github.com/microsoft/Bringing-Old-Photos-Back-to-Lif... For which the models are available online. No need to train in this case. If this was a new project and you were starting from scratch but already had a clean dataset, 0.5 to 3 days of work (excluding training time). The model is a VAE so I would approximate less than 2 days of training time on a modern GPU.