[bug #58833] Segment crashes when detetion map has blank pixels

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?58833>

                 Summary: Segment crashes when detetion map has blank pixels
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Sun 26 Jul 2020 09:59:18 PM BST
                Category: Segment
                Severity: 3 - Normal
              Item Group: Crash
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The input detection map in Segment is interpreted as a signed 32-bit integer
type. So when it has blank values, they are stored as the smallest possible
number in this format (a huge negative number).

However, the checks at the start of Segment don't account for this, so when
there are blank elements in the detection map, Segment crashes, by saying that
there are negative pixel values in the detection map (which should be only
positive).

This bug was reported by Zahra Sharbaf.




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