How to use: https://www.youtube.com/watch?v=sCJqmasct_c

This is a workflow that quickly Upscale images to 8K resolution; simply drag and drop your image and click to run. The red section contains parameters that can be adjusted according to your needs.

Thanks for ControlAltAI in youtube and Kijai in github. This workflow is bulit on top of them and I learned a lot form their work.

Models:

Checkpoint:

SUPIR-v0Q: https://huggingface.co/camenduru/SUPIR/tree/main

juggernaut xl v9rdphoto2 lightning: https://civitai.com/models/133005/juggernaut-xl

Upscale_models:

4x_foolhardy_Remacri: https://huggingface.co/FacehugmanIII/4x_foolhardy_Remacri

Instruction:

The red section contains parameters that can be adjusted according to your needs.

Supir Sampler:

Sampler: Choose "DPMPP2M" for more details, choose "EDM" to prevent excessive sharpening. The tile sampler  can give you a better result with longer time

s_noise: If you want it to be more similar to the original image, lower it (for example, set it to 1 or 1.001); if you want to make the original image clearer, increase it (for example, set it to 1.01). Do not enter too large a value here!!!!

ImpactInt:

I set this value to 2000 to get a 2K resolution image in the first step, you can chage it.

Tile Size/Tile Stride:

If your video memory is small, you can halve these two values to 512 and 256

Supir Conditioner:

You can enter more precise prompt words to enhance the effect.