Real-ESRGAN x4

4x super-resolution on a native-resolution crop, split against plain bicubic interpolation — left half free, right half the model. Heaviest of the five demos. The reference tiles a whole photo and stitches the results back together; this page upscales a single centre tile, so you see a patch rather than the full image and the compare view's timing stays directly comparable to every other demo. Sample image: Wikimedia Commons