Spoiler:
@BetterRed, @Terisa de morgan: I got nothing to do with olives, but I got 2 open eyes. That's why I feel justified and able to report.
There are quite different ways to get the stuff from the trees, manuale and more or less machine. And the fully automatic! This, however, may take years (olives don't fall as easy as apples from the tree) and is less interesting for the olive tree owner.
To get them from the floor, it's the same, see above. Only with a significant difference. The fully automatic version (leaving the olives rot) no longer interests anyone.
There are a kind of sweepers (about 1.50 to 2 m wide), quite a dusty matter, I am standing next to it, which gather the whole snot (ie olives, earth, dog shit, etc.). "Will get washed in the factory," said the Canuk. (Canuks are something like, in German, Kanaken?)
Can you imagine where or for what finally that oil is used?
Anyway, the olives for the better oil is always collected with manual laid out nets or with on tractors fixed frames, similar to a 180-degree turned around umbrella. It is not quite irrelevant that this, our good or 'virgin' olive oil, the life-prolonging, often contains a certain proportion of meat (olives are very gladly affected by worms, diameter about 1 mm, which got a good live for at least weeks inside the olive).
Enjoy your meal.
Concerning the issue 'how I would prefer software to be', I think about.