IMI GDM2 WS24 - Explaining The Scalar Quantising

This semester is a bit different, as are all the exercises. Here I attempt to explain how to go on about writing programs in Java, asuming one has never done anything similar before.
So, writing a main method, identifying classes, looking them up and even some basic implementation.

PS: when writing pixels back, remember that you need to add the alpha channel (if there is one) back too!