Debayering pattern-how does it work with Red's 1/2,1/4 etc. debayer?

[Philip Powell]

I've been looking at the info on bayer sensors, as viewed here on wikipedia.

But by looking at the images of the Red, Green, Blue photosensors patterns, how they are arranged that is, I'm having trouble figuring out, what is "skipped" when a half (or further on down the line) de-bayer is done?

They only pattern that I can get to work is if pairs of lines are skipped, not alternating ones.

Is it done in quadrants? Or some other way?

I'm sure this is quite simple but I can't seem to grasp it, would someone be so kind as to enlighten me.

 

[Graeme Nattress]

Nothing, specifically, is skipped - the properties of the wavelet encode is to work like a downsample.

Graeme