AI models used by PDFPixo (downloaded only when the tool is used, then cached)

u2netp.onnx — background removal ("Remove photo background", "Make background white")
  Model: U-2-Net small (U2NETP), Apache-2.0 — https://github.com/xuebinqin/U-2-Net
  ONNX file from rembg releases: https://github.com/danielgatis/rembg/releases/download/v0.0.0/u2netp.onnx
  SHA-256: 309c8469258dda742793dce0ebea8e6dd393174f89934733ecc8b14c76f4ddd8

realesr-general-x4v3.onnx — "AI photo enlarger"
  Model: Real-ESRGAN general x4 v3 (SRVGGNetCompact), BSD-3-Clause — https://github.com/xinntao/Real-ESRGAN
  Weights: https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-general-x4v3.pth
  Converted to ONNX (opset 17, dynamic height/width) for this site.

Runtime: onnxruntime-web (MIT), files in /ort.
