Re: [APML] OT: DSS image processed: Barnard 142/143Complex ("E"Nebula)

[Vicent Peris <vicent@cepheusastrophoto.com>]

Hi Steve,

usually, making a different SGBNR for each channel can cause chromatic 
deviation,
you must be very carefull!

I can't help you much more without viewing the image. Can you email me the 
processing
icon to view the parameters you are putting into the SGBNR tool?

Write me to vicent@DELETETHIScepheusastrophoto.com

Regards,
Vicent.



At 18:14 13/10/2004 -0700, you wrote:
>Hi Vicent--a quick question.
>I've just downloaded PixInsight LE, and am experimenting with it.
>
>I have 3 R G B images of NGC7000 I want to combine to make a color picture.
>I want to apply a small amount of blur to just the red channel to reduce 
>noise in the nebulosity.
>
>It seems when I try to apply  SGBNR to just the Red channel in PixInsight 
>the contrast level changes drastically,
>and the color balance of the resulting combined RGB is almost entirely red.
>I admit, I haven't read all the help files, but is there a simple step I'm 
>overlooking?
>
>Steve
>(ps the images come from the "Dark Side", but the application should be 
>the same in either case)
>
>Vicent Peris wrote:
>
>>Well, all you must do is to know what are you doing with the image. It's 
>>essential to have a good dosis of auto-criticism to know if you are 
>>generating artifacts, as well as knowing how your eyes perceive the photo.
>>
>>Vicent.
>>
>
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Vicent Peris
http://www.cepheusastrophoto.com/Index.html

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