Comment by anfractuosity

I didn't think a single photosite was directly converted to a single pixel, there's quite a number of different demosaicing algorithms.

Edit: Upon doing some more reading it sounds like a photosite or sensel, isn't a group of sensors, but a single sensor, which can pick up r,g,b,.. light - "each individual photosite, remember, records only one colour – red, green or blue" - https://www.canon-europe.com/pro/infobank/image-sensors-expl...

I couldn't seem to find a particular name for the RGGB/.. pattern that a bayer filter consists of an array of.