Arrival of a Train at La Ciotat is one of the most famous films in cinema history. Shot by French filmmakers Auguste and Louis Lumière, it achieved an unprecedented level of quality for its time. Some people regard its commercial exhibition in 1896 as the birth of the film industry. An urban legend—likely apocryphal—says that viewers found the footage so realistic that they screamed and ran to the back of the room as the train approached.
The article below shows the original and the really stunning result from upscaling.
How did Shiryaev do it? He says he used commercial image-editing software called Gigapixel AI. Created by Topaz Labs, the package allows customers to upscale images by up to 600 percent. Using sophisticated neural networks, Gigapixel AI adds realistic details into an image to avoid making it look blurry as it's scaled up.
See Someone used neural networks to upscale a famous 1896 video to 4k quality
Machine-learning software fills in missing details to produce realistic images.