PixInsight Forum (historical)

PixInsight => Tutorials and Processing Examples => Topic started by: retret66 on 2018 November 16 06:42:44

Title: Stacking in Different focal lengths
Post by: retret66 on 2018 November 16 06:42:44

I am searching and can't find any tutorial or instructions. I have a 714mm and a 400mm light frames and I would like to add the 714mm detail to 400mm but there is a hard line. Is there a setting or reprocessing that will help me merge and get rid of those lines? Thanks
(http://funkyimg.com/i/2NcLL.jpg)

Title: Re: Stacking in Different focal lengths
Post by: Enzo De Bernardini on 2018 November 16 07:35:15

Hi,

I'm not totally sure, but you can try checking Frame adaptation option in StarAlignment process (if you are using BatchPreprocessing script, check Calibrate only, and align with StarAlignment the calibrated frames, after that, stack with ImageIntegration)

Best regards,

Enzo.

Title: Re: Stacking in Different focal lengths
Post by: retret66 on 2018 November 16 09:39:14

Thanks!! will try this workflow...

Title: Re: Stacking in Different focal lengths
Post by: retret66 on 2018 November 16 11:43:48

That did not go well,, I dont have dark frames and bias.. I did however select below in ImageIntegration..

Combination: Minimum
Normalization: Multiplicative With Scaling

and I get this:
(http://funkyimg.com/i/2NdeC.jpg)

Title: Re: Stacking in Different focal lengths
Post by: MikeOates on 2019 January 29 04:13:38

Try using drizzle integration after the normal integration. If you don't want it larger just set it to 1x. Drizzle integrations tend to blend in the edges a lot better.

Mike

Title: Re: Stacking in Different focal lengths
Post by: kolec on 2019 January 30 02:39:27

It is easy  - You must use another program . No PIXI . With Pixi  is it possible, but very difficult

If You want know more - try  The "Astro Imaging Channel" - I think 2-3 month ago - (presentation   )

kolec

Title: Re: Stacking in Different focal lengths
Post by: Juan Conejero on 2019 January 30 03:34:43

Kolec, very considerate and polite. I hope you are not like that in your daily life, but only to despise a man who works hard trying to do his job as best as he can every day. Don't worry nothing happens. I'm quite used to this.

Quote

I dont have dark frames and bias.

The original problem here seems to be lack of proper calibration. With accurately calibrated data, frame adaptation in StarAlignment should fix these differences. That said, it is clear that some of our tools should be improved to make this type of image combinations easier. I'll try to work more and better on this.

Title: Re: Stacking in Different focal lengths
Post by: kolec on 2019 February 03 14:48:48

Twenty times I red Your replay. I understand You.  OK. 

Kolec