Edge-directed image upsampling for Digital Elevation Models (DEM).
Have a look at https://opendem.info/dcci.html for detailed information.
The implementation is based on Organa HQX implementation on GitHub.
An implementation of Directional Cubic Convolution Interpolation (DCCI) proposed in: D. Zhou1, X. Shen & W. Dong. "Image zooming using directional cubic convolution interpolation. 2012.
The Notebook is running on Google Colab with data storage on Google Drive. Of course this could be adapted to local resources
Download the training, test and validation data of the Austrian DTM here. License: Data by - Geoland.at (2019) - CC BY 4.0 (CC BY 4.0)