Flux NF4 : Image Upscaler

ComfyUI Workflow: Flux NF4 – Image Upscaler

This ComfyUI workflow uses the Flux NF4 model for high-quality image upscaling, designed to enlarge images while preserving fine detail. NF4 quantization allows the workflow to run with reduced VRAM compared to full-precision Flux variants, making it practical for users with mid-range hardware.

Key features

• NF4 quantization: Lower memory footprint than full-precision Flux without major quality loss.
• Detail preservation: Maintains texture, edges, and facial features during upscale.
• Multi-stage scaling: Supports 2x to 4x upscale in a single pass.
• Tiling support: Handles large images that exceed available VRAM by processing in tiles.
• Format flexibility: Accepts common image formats and outputs matching the source.

Use cases

• Photo restoration: Upscale old or low-resolution photos for print or display.
• AI output enhancement: Enlarge Flux-generated images to print or production resolution.
• Web-to-print: Convert web-resolution assets to print-ready files.
• Archive digitization: Bring archival imagery up to modern resolution standards.