That's a great question! My original plan that once I had extracted all the items from the plate, the app would then detect the average colour of the remaining regions and "fill" the gaps - that wouldn't work well with plates that have different patterns, but would probably be good enough for plates of a single colour.

Due to time constraints (and ultimately solving the majority of the problems I had originally aimed to with this project), the app replaces the cropped circular region with a plain white plate (a separate image contained in the app) before placing the extracted items.

Maybe I'll go for the more advanced implementation if/when I spend more time on this project!

It discards original plate and puts everything on image of an empty plate [0][1]. The effect is surely a bit more impressive when the plates match :)

[0] https://github.com/AaronRandall/Megabite/blob/b982d587677b93...

[1] https://github.com/AaronRandall/Megabite/blob/master/Megabit...