Is there any way to improve the picture quality?

Question

Images

Good afternoon or evening, I read somewhere on Habré how a guy overtook a mule from full HD to 4k. First into pictures, and then the pictures themselves in 4k, and at the end I collected everything. I have a question I have N number of pictures I want to improve their quality. How can I improve this quality? below examples

Answer 1

Try letsenhance.io

Answer 2

The guy may have used some upscaling algorithms, but he initially had a picture of adequate resolution. You have pictures in 300-400p, also compressed by jpeg. There is no way to improve their quality.

Answer 3

Call miami, csi, the guys there have programs for this.