Real-ESRGAN x2plus / x4plus — ONNX export

ONNX re-exports of Real-ESRGAN (xinntao — BSD-3-Clause): 2× and 4× image super-resolution. All credit for the original weights goes to xinntao.

Exported for QtMeshEditor (issue #405), powering qtmesh material --texture <low> --upscale {2|4}, the Material Editor's "Upscale 2× / 4×" buttons, the upscale_texture MCP tool, and the optional texture-upscale stage of the image-to-3D pipeline — local inference via ONNX Runtime.

The files QtMeshEditor downloads at runtime live in the shared fernandotonon/QtMeshEditor-models repo (top level). This repo is the standalone model card + mirror.

Files & I/O

file	scale
`RealESRGAN_x2plus.onnx`	2×
`RealESRGAN_x4plus.onnx`	4×

1×3×H×W float NCHW in [0,1] → 1×3×(s·H)×(s·W). Dynamic H/W — tile large inputs with overlapping tiles and composite in OUTPUT space with a feathered seam blend (detect the scale factor from the output/input ratio at runtime rather than hardcoding it).

Reproducing

scripts/export-realesrgan-onnx.py in the QtMeshEditor repo (one-time, offline).

License

BSD-3-Clause (the upstream repo LICENSE has no code/weights carve-out and OpenModelDB classifies the released weights as BSD-3). Credit: xinntao.

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