[task #15786] Column to calculate half the total area

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/task/?15786>

                 Summary: Column to calculate half the total area
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Tue 06 Oct 2020 05:21:15 PM BST
         Should Start On: Tue 06 Oct 2020 12:00:00 AM BST
   Should be Finished on: Tue 06 Oct 2020 12:00:00 AM BST
                Category: MakeCatalog
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

One useful measure for the morphology of an object is the area that contains
half of the total flux over a label. For example we can use the square root of
this area as an approximation of its effective radius. So it would be useful
to have such a column.

In practice, because this will involve sorting a label's pixels, we do already
have the main components: in the same function that we calculate the object's
median. 




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