[bug #64138] Arithmetic's mknoise-poisson only using first pixel value

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?64138>

                 Summary: Arithmetic's mknoise-poisson only using first pixel
value
                   Group: GNU Astronomy Utilities
               Submitter: makhlaghi
               Submitted: Wed 03 May 2023 02:49:42 PM BST
                Category: Arithmetic
                Severity: 3 - Normal
              Item Group: Output not reasonable
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any


    _______________________________________________________

Follow-up Comments:


-------------------------------------------------------
Date: Wed 03 May 2023 02:49:42 PM BST By: Mohammad Akhlaghi <makhlaghi>
As of version 0.20, when Arithmetic is called with the 'mknoise-poisson'
operator, it will only use the first pixel to define the noisy scatter (while
it should use each pixel's value separately).

This bug was reported by Irene Pintos-Castro when using it on an image with a
NaN value on its first pixel (where the resulting image would be fully NaN).

The problem can be reproduced with this command:


$ cat img.txt 
nan 1 2
1   2 3
1   2 3

$ astconvertt img.txt -o img.fits

$ astarithmetic img.fits 5 mknoise-poisson -onoisy.fits

$ aststatistics noisy.fits --number
aststatistics: noisy.fits (hdu: 1): all elements are blank









    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?64138>

_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/