Key points to note: It is recommended to set the controlnet weight value between 0.6 and 0.9. For photos that are too blurry, it is advisable to repair them several times with a slightly higher weight to avoid a significant difference between the final image and the reference image. The Flux model has very high requirements for GPU memory configuration!!!
Below is the online version https://huggingface.co/spaces/jasperai/Flux.1-dev-Controlnet-Upscaler