bugGNU Astronomy Utilities - Bugs: bug #65780, Not resonable output in psf-stamp...

 
 

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bug #65780: Not resonable output in psf-stamp with warp

Submitter:  Sepideh Eskandarlou <sepideh>
Submitted:  Thu 23 May 2024 12:01:47 PM UTC
   
 
Category:  Installed scripts Severity:  3 - Normal
Item Group:  Output not reasonable Status:  Confirmed
Privacy:  Public Assigned to:  infantesainz
Open/Closed:  Open

Mon 27 May 2024 06:58:20 PM UTC, comment #2: 

Thanks for reporting these problems Sepideh.

Until we have time to debug these problems, in Commit e985712d4f, I just revered these scripts and their corresponding documentation to their state before that branch was merged.

Hopefully later, when we find a good solution to these problems, we will re-implement them in the 'master' branch.

Mohammad Akhlaghi <makhlaghi>
Group administrator
Thu 23 May 2024 12:13:28 PM UTC, comment #1: 

FYI: all the left hand images are the original image and the right hand one is the output of `astscript-psf-stamp`.

  • First problem is the bleeding area shape. If you see the below image you can see the shape of the bleeding area is changed.




  • Second problem is when we are using the warp the image will flip. As you can see all the regions which are marked with different colors are flipped.




  • Last problem is MoirĂ© patterns which are created due to the warp and are illustrated with red arrows in the image below.




Due to all of these problems we should not use warp in `astscript-psf-stamp` and bring it to the previous version or find the better solution for it.

Sepideh Eskandarlou <sepideh>
Group Member
Thu 23 May 2024 12:01:47 PM UTC, original submission:  

Until now, we used the translate to put the coordinate exactly in the center of the pixel and then we masked the extra objects and it worked properly.


Recently, in a new version of the Gnuastro for putting the coordinate exactly in the central coordinate of the pixel, we are using warp. But it causes a lot of problems which will be reported in the following comments.

Sepideh Eskandarlou <sepideh>
Group Member

 

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Attached Files
file #56092:  sav-bleeding.png added by sepideh (16KiB - image/png)
file #56093:  sav-moare-pattern.png added by sepideh (759KiB - image/png)
file #56094:  sav-flip.png added by sepideh (764KiB - image/png)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2024-05-23 sepideh Attached File- Added sav-bleeding.png, #56092
        Attached File- Added sav-moare-pattern.png, #56093
        Attached File- Added sav-flip.png, #56094

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