Bernard,
Yes, I have Pixinsight and actually tried doing Star removal, which seems to be
necessary when swapping stars. I found two sites about using PI for this, but
had trouble doing it. One site, (Trapped Photons.com) says that multiple
masks for different size stars should be combined (in a rather complicated
way). Another,
(https://barrywilson.smugmug.com/PixInsight-Tutorials/Starless-technique-for-Hubble-Palette-narrowband-images)
is also about star removal. I really need advice on this.
Unfortunately, I still don't have good RGB star images because of bad weather
recently. There may be one more chance after Dec 16 when the moon is far
enough East and before the Elephant Trunk gets too far West. Or, swapping
stars may have to wait a few months.
I left this reply on AZ-Observing because it may help others in making star
masks.
Paul
----- Original Message -----
From: Bernard Miller <bgmiller011@xxxxxxx>
To: az-observing@xxxxxxxxxxxxx
Sent: Wed, 04 Dec 2019 18:20:42 -0500 (EST)
Subject: [AZ-Observing] Re: 2nd send attempt - narrowband image
Paul,
Do you have access to Pixinsight?
Bernard
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx On Behalf Of Paul Lind
Sent: Tuesday, November 26, 2019 9:02 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: 2nd send attempt - narrowband image
Bernard,
I made a feeble attempt at swapping out stars to get better star color in the
Elephant Trunk image as you suggested, but ended up just subtracting magenta.
That improved star color by making stars whiter. The image lost some magenta
shading toward the lower right but overall color is still pretty good. The
modified image at https://pbase.com/paullind/image/169967495
Thanks again for your advice,
Paul Lind
----- Original Message -----
From: Bernard Miller <bgmiller011@xxxxxxx>
To: az-observing@xxxxxxxxxxxxx
Sent: Wed, 30 Oct 2019 19:20:10 -0400 (EDT)
Subject: [AZ-Observing] Re: 2nd send attempt - narrowband image
Paul,
Beautiful colors. If you could get about an hour each of RGB and add RGB stars
it would be even better.
Bernard
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx On Behalf Of Paul Lind
Sent: Tuesday, October 29, 2019 9:45 PM
To: az-observing <az-observing@xxxxxxxxxxxxx>
Subject: [AZ-Observing] 2nd send attempt - narrowband image
Didn't look like this was sent but my computer says it was! sorry if you
received this twice.
Here is an image of IC 1396, the Elephant Trunk Nebula in SII, Ha, and OIII
Hubble Palette -> RGB. It was taken on Friday and Saturday at the All
Arizona Star Party and is my first attempt at a Hubble Palette image.
See: https://pbase.com/image/169967495
Paul Lind
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