Request: Improving RealSR quality

[Dan64]

Recently I found the following spin-off of the project RealSR: https://github.com/xinntao/Real-ESRGAN

The project is called Real-ESRGAN, and there is not a specific Vapoursynth filter, but the models are "compatible" with the models used by RealSR.

The models are included in the distribution: https://github.com/xinntao/Real-ESRGAN/r...indows.zip

And are the following:

realesrgan-x4plus (for real-life video upscaling)
realesrgan-x4plus-anime (for anime video upscaling)
realesrnet-x4plus (model trained on DIV2K dataset)

the realesrgan-x4plus is probably the best model for upscaling videos (at cost of speed).

To test the model i renamed "realesrgan-x4plus" in "x4" and then I override the files in "Hybrid\64bit\vsfilters\ResizeFilter\RealSR\models\models-DF2K_JPEG".  Given the compatibility with RealSR this was the easiest solution to use hybrid to test the model.

To test the model I downsized a short movie (20s) to the resolution of 640x346 (ratio 1.85:1) and then I resized it to 1920x1040.

This is the image resized with Lanczos4



This is image is very near to the source (fake Blu-Ray) since I used for testing a clip of the movie "28 Days Later" that was filmed using a Canon XL-1s standard-definition camcorder at 720x576 resolution and probably the Blu-Ray was obtain by up-scaling with Lanczos (or something similar) the original movie.

The following picture was obtained using RealSR included in Hybrid



And finally this is the picture obtained using realesrgan-x4plus



As it is possible to see it is not necessary to perform 4x zoom to observe the details, the difference is very clear and the up-scaled image with realesrgan-x4plus contains more details than the original movie.

REQUEST

It would be nice if Hybrid will include in RealSR filters also the models described above:

• realesrgan-x4plus
  
• realesrgan-x4plus-anime
  
• realesrnet-x4plus
  

Thanks