Add image comet

[beta63]

Hello.
I photographed the comet Lovejoy and want to get a picture with the stars still.
I created 2 stacks, one with the stars and the comet still move and one with the comet stops and the stars move.
How can I steal the stars moved and paste the stars still?
I apologize for the text ..... I hope you understand.
greetings
Paul

[oldwexi]

Hi Paul!
a) register images to stars.
b) use the Script CometAlign to register the images on the comet.
c) integrate these images with process ImageIntegration (Windsorized Sigma clipping or LinearFit)
   this gets you the comet only with stars mostly removed.
d) mix the last image of your cometaligned images with starmask into the result from before by using PixelMath.

Thats one way - the way i do it usually.

Gerald

[diurnal]

i know what you mean, the only way i did it was in photoshop. i don't know how you do it in pixinsight. i can let you know how to do it if you got photoshop.

[beta63]

Hello Gerald!
I'm not very expert in PixInsight, I'll try to follow your step by step guide, thanks anyway for the suggestion.
If I have problems call you back.
Greetings.
Paul

[beta63]

Hello Diurno!
I would be very grateful for the procedure with Photoshop.
I tried several times but without success.
thanks
Paul

[Juan Conejero]

i can let you know how to do it if you got photoshop.

I would be very grateful for the procedure with Photoshop.

Nice, but please use another forum to talk about that. We are not sponsored by Adobe Systems Incorporated.

[beta63]

i can let you know how to do it if you got photoshop.

I would be very grateful for the procedure with Photoshop.

Nice, but please use another forum to talk about that. We are not sponsored by Adobe Systems Incorporated.

I'm sorry, I did not think......
Paul

[Carlos Milovic]

Another way to do it is by just adding the stars:

If the image identifier of the image with the stars is "im_stars", and the one with the comet "im_comet", just put the following expression in PixelMath (and check the Rescale option if you want, to avoid clipping in the cores of the most brilliant stars):
im_comet + im_stars-Med(im_stars)

Replace the identifiers with the actual ones, or rename your images.

[beta63]

Hallo Carlos!
Thanks for the hint.
I will try to do as you told me.
Another question: But where do I find the script "Comet align" for PI 1.8 RC7?
Thank you.
Paul

[dzso.bacsi]

Hi,

Process->ImageRegistration->CometAlignment

[beta63]

Hi,

Process->ImageRegistration->CometAlignment

Sorry I meant where to download it?
Thank you.

[dzso.bacsi]

Sorry, I cannot tell you that.  It is/was an automatically built-in process of the PI 1.8 RC7 I use...

[Harry page]

Another way to do it is by just adding the stars:

If the image identifier of the image with the stars is "im_stars", and the one with the comet "im_comet", just put the following expression in PixelMath (and check the Rescale option if you want, to avoid clipping in the cores of the most brilliant stars):
im_comet + im_stars-Med(im_stars)

Replace the identifiers with the actual ones, or rename your images.

Hi if you do this there are still parts of the bright comet still inc as well , do you any further suggestions please

Harry