Automate the detection of screen events from the Chart

I will order to write a script that will be able to correctly and without mistakes read from charts of this type (as from the image attached), the codes of the countries through which the driver passes. The script should detect PL for Poland and other codes for other countries. The script should return the days and times along with the country code through which the driver passed. The script should be written in Python or be supported by python, as it is part of a larger project. Note that country codes never occur in the same place. Drivers enter different countries at different times on different days. Country codes are also often not clear or partially covered in the chart. The most important feature of the script is the ability to distinguish between a PL-PL route in Poland and a route in which the driver went abroad.