Useful links:

Source/databases of images:
* Standard test image: https://en.wikipedia.org/wiki/Standard_test_image
* Kodak standard images: http://r0k.us/graphics/kodak/
* The USC-SIPI Image Database: https://sipi.usc.edu/database/database.php
(University of South Carolina, Signal and Image Processing Institute)

Source of other data:
* weather data: https://www.meteoblue.com/en/weather/archive/export

Source/databases of other general data (not used in the selection):
* https://archive.ics.uci.edu/ml/index.php
* https://www.kaggle.com/datasets
* https://data-flair.training/



