Re: [APML] M33, my first combine

[Alan Voetsch <alanv12952@yahoo.com>]

Hey Wei-Hao,

--- Wei-Hao Wang <whwang@gmail.com> wrote:
> Very nice image.

I appreciate that, thanks.  

> I wonder if the image quality can be further improved.   In Registar,
> do you calibrate the brightness and color of the two images before 
> you average them?  If not, and if the brightness of each image is not
> 
> changed after being scanned (with identical scanner setting), 
> perhaps 1:1 weighting will give you the best final S/N. 

I did not do calibrating in RS. I found the instructions rarher vague
an dnon-committal about this and many other issues. I simple registered
and combined using 'average. As I requested, I would love to hear any
advice and other suggestions regarding this feature and others. Anybody
have a RS tutorial that makes sense?

>  If the images 
> are calibrated, perhaps 2:1 weighting will work the best.  Your 
> exposure time ratio is 2:1 but weighting ratio is 4:1.  This may over
>  emphasize the long exposure one.  

Is that the way 'weighting' is supposed to be setup. I tried several
variations and 80/20 gave me the smoothest result. I wanted to
over-emphasize the longer shot, the shorter one was very grainy.

TRhank you for your comments,
Alan



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