ESPCN pretrained x2 model from TF-ESPCN, https://github.com/fannymonori/TF-ESPCN
Apache License 2.0. Weights extracted from the frozen TensorFlow graph; WebGPU inference implementation added by this project. Input: normalized BT.601 luminance. Layers: Conv5x5+ReLU, Conv3x3+ReLU, Conv3x3, pixel shuffle x2, tanh.
