[lcrs]

I'm actually not sure much ML was involved here - depends where you draw the line I guess, but denoising and interpolation for restoration typically use more traditional wavelet and optical flow algorithms. The work for this was done by Park Road Post and StereoD, which are established post-production facilities using fairly off-the-shelf image processing software. The colorisation likely leant heavily on manual rotoscoping, in the same way that post-conversion to stereo 3D does.

I'd love to hear otherwise but I'm not aware of any commercial "machine learning" for post-production aside from the Nvidia Optix denoiser and one early beta of an image segmentation plugin.

[nkoren]

Huh, I recall seeing an article at one point (can't find the link) where it said or suggested that ML was involved. Of course this could have just been a journalist failing to make the distinction; I've seen everything from linear regression on up naively lumped into the ML bucket.

In any case the results are damned impressive -- can't say I've seen anything like it before.