Quote:
Originally Posted by Hagar
I didn't see any real advantage in splitting the image into 3 colours, manipulating the recombining.
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I got into the habit of splitting channels because the very first times I used CCDStack I used to get color ringing around my stars. That was due to undersampling and doing the data rejection on color subs. After a chat with Stan Moore he advised me to process and stack every channel independently and in my case it did smooth out star edges. The problem was gone. I never had the problem with the C11 though because my image scale is 0.4 asp. Overtime I 've also found that processing separate channels allowed me to be more selective with noise reduction because I always seemed to attract more noise in green and blue pixels when the reds have always been relatively clean.