I understand how a one shot color camera has an effective lower resolution compared to an equivalent monochrome camera due to the Bayer Matrix. The total number of pixels is the same after interpolation but does the interpolation have a similar effect to binning? I'm wondering whether it should somehow factor into calculating your pixel scale for a given OSC/Scope vs Mono/Scope combination?
The standard way to process OSC images is to Bayer interpolate each exposure to make it RGB - then align and stack the frames. That involves Bayer interpolation, where a number of neighboring pixels of different colors combine information to determine the color at a given pixel. That will inherently have some blurring and loss of detail involved.
But some software nowadays allows a form of "Bayer drizzle" - where the individual pixels are mapped directly into separate color channels - and no Bayer interpolation is involved. The exposures are aligned - and all the red pixels get added into a red frame, green into green, and blue into blue.
If the original exposures were dithered somewhat you will end up with full detail in each of the channels - just like mono. There is only slight loss of efficiency compared to mono because there is a doubling of the green pixels in a Bayer matrix.
Here are some examples using Hyperstar:
And here is using OSC with an Ha filter and only drizzling the red pixels. Again you end up with full resolution and no loss of detail even though it is OSC. But for Ha imaging it is less efficient because only 1 of 4 pixels is gathering light for the image.