FLUX.2 Klein 9B One-Click HD Upscale

This is a high-definition image upscaling application based on the FLUX.2 Klein 9B + Dual-Stage Upscaling Chain. After users upload an original image, the system first performs a base pixel resize, enhances details through a first-stage redraw, integrates an AI Super-Resolution Model Upscale, applies a second low-strength refinement, and finally outputs a high-definition image with higher clarity, richer details, while closely maintaining the original color and exposure consistency. The file structure clearly shows the complete "upscale + rollback + refinement" chain: ImageScaleToTotalPixels → KSampler → ImageUpscaleWithModel → ImageScaleBy → KSampler. Therefore, this is not just a simple super-resolution, but a production-grade high-definition reconstruction.

It is especially suitable for scenarios such as: turning low-res images into high-res, restoring old photos, generating large cover images, upscaling e-commerce assets, and high-definition poster remaking. Compared with ordinary upscaling, the advantages of this workflow are: It doesn't just make things bigger; it adds details, controls colors, and performs further refinement, making the result closer to the original image yet much clearer. By default, users are recommended to adjust only the Original Image + Base Clarity + Prompt; if you want it sharper or more natural, you can then adjust the two Upscale Strengths.

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