YouTuber bycloud demonstrates how a deep face dictionary network (DFDNet) can be applied to degraded and low-quality images to create better quality facial restorations: "In this video I combined and compared colorization, upscaling, and image super-resolution." For those interested in the technical aspects, here is a paper on how it works.
This iconic image of Che Guevara gets significantly sharper when processed in black and white:
Below is a blurry low-res image of Marilyn Monroe, first AI colorized, then run through DFDNet:
Here is the same with Charlie Chaplin:
Image: YouTube / bycloud