Deepskystacker -- Bayer Drizzle vs Non-Bayer Drizzle

The following images are acquired by:
Modified 350D, 135F2L @ F2
Exposure: 5x4min @ ISO400 + 5x4min @ ISO800
Registering and stacking: Deepskystacker

There is a feature in the software called Bayer Drizzle which I haven't noticed before. According to the name of teh feature itself, its function seems to be performing a calculation which allows the Bayer grid of a DSLR to maximize its resolution so that it can perform on par with mono colour CCD. (I'm a total idiot on this kind of stuff.... for the detailed explanation on how it is done please refer to the help manual.. or if i have time I will try to understand it and talk about it later)

To activate the feature you can go to the Raw and DDP settings and check the box "Bayer Drizzle"

So this is what it is like:


Original:



Bayer Drizzled

It seems that I had a problem with the little blue and red squares after the stacking... and Wei-Hao Wang explained to me the reason of the problem is the brightness difference of the raw frames. Then I stacked the ISO 400 and 800 frames seperately and then combined them together and got the following result.

Bayer Drizzle version 2

The square pattern is gone and the stars are much tighter than the original... nice!