realesr-general-x4v3-fp32.onnx: the picture-enlarging model used by the "Upscale an image for print" tool.

Real-ESRGAN, realesr-general-x4v3 (Xintao Wang, Liangbin Xie, Chao Dong, Ying Shan),
https://github.com/xinntao/Real-ESRGAN, weights from release v0.2.5.0 (realesr-general-x4v3.pth, BSD-3-Clause).
The ONNX file was written by hand from those official weights (the network is SRVGGNetCompact: 32 convolution
layers, PReLU, a pixel shuffle and the input enlarged by nearest neighbour, added to the output). The weights are
stored in float32 and are not changed. It matches a separate quantized conversion of the same model to within
0.02 of an 8-bit level on average.

The model guesses detail from the pixels it is given. It does not restore detail that was never in the picture.

The licence of the Real-ESRGAN code and weights follows.

BSD 3-Clause License

Copyright (c) 2021, Xintao Wang
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