What is the name of the upscale without improvement?

Question

Raster graphics

What is the name of upscaling without quality improvement, whether it's a jpg or a video sequence?
There is a name for this effect, when a small image stretched to FHD looks creepy in the end.

Answer 1

upscaling without quality improvement

Sometimes it is not directly called in any way - "Interpolation: none" or "No interpolation" (in the picture below on the left). And somewhere they call it by the name of the corresponding simplest algorithm - Nearest neighbor :

PS
If you need the quality "***whose jackal" famous for memes , then in addition to scaling, you need to apply a high degree of jpeg compression:

Are you squeezing again?