[janalsncm]

If there is a movie which is only shot in 1080p and I have a 4k TV, it seems like there’s three options. One, watch it in the original 1080p with 3/4 of the screen as black border. Two, stretch the image, making it blurry. Three, upscale the image. If you give me the choice, I’m choosing 3 every time.

Sorry if it sounds crass, but I feel the process of shooting the movie is less important than the story it is trying to tell.

[planede]

Upscaling exactly 2x is also an option.

[janalsncm]

That’s what I meant by option 3?

[planede]

How do you differentiate between "stretch" and "upscale"? Or how would "stretching" by exactly 2x would make the image blurry?

[tstrimple]

Upscaling algorithms vary from the extremely basic to the ML models we see today that straight up replaces or adds new details. Some of the more naive algorithms do indeed just look blurry.

https://en.wikipedia.org/wiki/Comparison_gallery_of_image_sc...